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Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Browse Source 
Pull sched.h split-up from Ingo Molnar:
 "The point of these changes is to significantly reduce the
  <linux/sched.h> header footprint, to speed up the kernel build and to
  have a cleaner header structure.

  After these changes the new <linux/sched.h>'s typical preprocessed
  size goes down from a previous ~0.68 MB (~22K lines) to ~0.45 MB (~15K
  lines), which is around 40% faster to build on typical configs.

  Not much changed from the last version (-v2) posted three weeks ago: I
  eliminated quirks, backmerged fixes plus I rebased it to an upstream
  SHA1 from yesterday that includes most changes queued up in -next plus
  all sched.h changes that were pending from Andrew.

  I've re-tested the series both on x86 and on cross-arch defconfigs,
  and did a bisectability test at a number of random points.

  I tried to test as many build configurations as possible, but some
  build breakage is probably still left - but it should be mostly
  limited to architectures that have no cross-compiler binaries
  available on kernel.org, and non-default configurations"

* 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (146 commits)
  sched/headers: Clean up <linux/sched.h>
  sched/headers: Remove #ifdefs from <linux/sched.h>
  sched/headers: Remove the <linux/topology.h> include from <linux/sched.h>
  sched/headers, hrtimer: Remove the <linux/wait.h> include from <linux/hrtimer.h>
  sched/headers, x86/apic: Remove the <linux/pm.h> header inclusion from <asm/apic.h>
  sched/headers, timers: Remove the <linux/sysctl.h> include from <linux/timer.h>
  sched/headers: Remove <linux/magic.h> from <linux/sched/task_stack.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/init.h>
  sched/core: Remove unused prefetch_stack()
  sched/headers: Remove <linux/rculist.h> from <linux/sched.h>
  sched/headers: Remove the 'init_pid_ns' prototype from <linux/sched.h>
  sched/headers: Remove <linux/signal.h> from <linux/sched.h>
  sched/headers: Remove <linux/rwsem.h> from <linux/sched.h>
  sched/headers: Remove the runqueue_is_locked() prototype
  sched/headers: Remove <linux/sched.h> from <linux/sched/hotplug.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/debug.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/nohz.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/stat.h>
  sched/headers: Remove the <linux/gfp.h> include from <linux/sched.h>
  sched/headers: Remove <linux/rtmutex.h> from <linux/sched.h>
  ...
This commit is contained in:
Linus Torvalds
2017-03-03 10:16:38 -08:00
parent 78769912f6 5eca1c10cb
commit 1827adb11a
1218 changed files with 5222 additions and 3571 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
include/linux/binfmts.h
View File

@@ -6,6 +6,8 @@
#include <asm/exec.h>
#include <uapi/linux/binfmts.h>
struct filename;
#define CORENAME_MAX_SIZE 128
/*
@@ -123,4 +125,12 @@ extern void install_exec_creds(struct linux_binprm *bprm);
extern void set_binfmt(struct linux_binfmt *new);
extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);
extern int do_execve(struct filename *,
const char __user * const __user *,
const char __user * const __user *);
extern int do_execveat(int, struct filename *,
const char __user * const __user *,
const char __user * const __user *,
int);
#endif /* _LINUX_BINFMTS_H */

1
include/linux/blkdev.h
View File

@@ -2,6 +2,7 @@
#define _LINUX_BLKDEV_H
#include <linux/sched.h>
#include <linux/sched/clock.h>
#ifdef CONFIG_BLOCK

13
include/linux/cgroup-defs.h
View File

@@ -531,8 +531,8 @@ extern struct percpu_rw_semaphore cgroup_threadgroup_rwsem;
* cgroup_threadgroup_change_begin - threadgroup exclusion for cgroups
* @tsk: target task
*
* Called from threadgroup_change_begin() and allows cgroup operations to
* synchronize against threadgroup changes using a percpu_rw_semaphore.
* Allows cgroup operations to synchronize against threadgroup changes
* using a percpu_rw_semaphore.
*/
static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
{
@@ -543,8 +543,7 @@ static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
* cgroup_threadgroup_change_end - threadgroup exclusion for cgroups
* @tsk: target task
*
* Called from threadgroup_change_end(). Counterpart of
* cgroup_threadcgroup_change_begin().
* Counterpart of cgroup_threadcgroup_change_begin().
*/
static inline void cgroup_threadgroup_change_end(struct task_struct *tsk)
{
@@ -555,7 +554,11 @@ static inline void cgroup_threadgroup_change_end(struct task_struct *tsk)
#define CGROUP_SUBSYS_COUNT 0
static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk) {}
static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
{
might_sleep();
}
static inline void cgroup_threadgroup_change_end(struct task_struct *tsk) {}
#endif /* CONFIG_CGROUPS */

2
include/linux/cpu.h
View File

@@ -30,6 +30,8 @@ struct cpu {
extern void boot_cpu_init(void);
extern void boot_cpu_state_init(void);
extern void cpu_init(void);
extern void trap_init(void);
extern int register_cpu(struct cpu *cpu, int num);
extern struct device *get_cpu_device(unsigned cpu);

2
include/linux/cpuset.h
View File

@@ -9,6 +9,8 @@
*/
#include <linux/sched.h>
#include <linux/sched/topology.h>
#include <linux/sched/task.h>
#include <linux/cpumask.h>
#include <linux/nodemask.h>
#include <linux/mm.h>

13
include/linux/cputime.h
View File

@@ -1,13 +0,0 @@
#ifndef __LINUX_CPUTIME_H
#define __LINUX_CPUTIME_H
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
#include <asm/cputime.h>
#ifndef cputime_to_nsecs
# define cputime_to_nsecs(__ct) \
(cputime_to_usecs(__ct) * NSEC_PER_USEC)
#endif
#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
#endif /* __LINUX_CPUTIME_H */

3
include/linux/cred.h
View File

@@ -18,8 +18,9 @@
#include <linux/selinux.h>
#include <linux/atomic.h>
#include <linux/uidgid.h>
#include <linux/sched.h>
#include <linux/sched/user.h>
struct user_struct;
struct cred;
struct inode;

1
include/linux/dcache.h
View File

@@ -11,6 +11,7 @@
#include <linux/rcupdate.h>
#include <linux/lockref.h>
#include <linux/stringhash.h>
#include <linux/wait.h>
struct path;
struct vfsmount;

38
include/linux/delayacct.h
View File

@@ -18,8 +18,6 @@
#define _LINUX_DELAYACCT_H
#include <uapi/linux/taskstats.h>
#include <linux/sched.h>
#include <linux/slab.h>
/*
* Per-task flags relevant to delay accounting
@@ -30,7 +28,43 @@
#define DELAYACCT_PF_BLKIO 0x00000002 /* I am waiting on IO */
#ifdef CONFIG_TASK_DELAY_ACCT
struct task_delay_info {
spinlock_t lock;
unsigned int flags; /* Private per-task flags */
/* For each stat XXX, add following, aligned appropriately
*
* struct timespec XXX_start, XXX_end;
* u64 XXX_delay;
* u32 XXX_count;
*
* Atomicity of updates to XXX_delay, XXX_count protected by
* single lock above (split into XXX_lock if contention is an issue).
*/
/*
* XXX_count is incremented on every XXX operation, the delay
* associated with the operation is added to XXX_delay.
* XXX_delay contains the accumulated delay time in nanoseconds.
*/
u64 blkio_start; /* Shared by blkio, swapin */
u64 blkio_delay; /* wait for sync block io completion */
u64 swapin_delay; /* wait for swapin block io completion */
u32 blkio_count; /* total count of the number of sync block */
/* io operations performed */
u32 swapin_count; /* total count of the number of swapin block */
/* io operations performed */
u64 freepages_start;
u64 freepages_delay; /* wait for memory reclaim */
u32 freepages_count; /* total count of memory reclaim */
};
#endif
#include <linux/sched.h>
#include <linux/slab.h>
#ifdef CONFIG_TASK_DELAY_ACCT
extern int delayacct_on; /* Delay accounting turned on/off */
extern struct kmem_cache *delayacct_cache;
extern void delayacct_init(void);

2
include/linux/dmar.h
View File

@@ -26,7 +26,7 @@
#include <linux/msi.h>
#include <linux/irqreturn.h>
#include <linux/rwsem.h>
#include <linux/rcupdate.h>
#include <linux/rculist.h>
struct acpi_dmar_header;

2
include/linux/elfcore.h
View File

@@ -3,6 +3,8 @@
#include <linux/user.h>
#include <linux/bug.h>
#include <linux/sched/task_stack.h>
#include <asm/elf.h>
#include <uapi/linux/elfcore.h>

2
include/linux/fault-inject.h
View File

@@ -61,6 +61,8 @@ static inline struct dentry *fault_create_debugfs_attr(const char *name,
#endif /* CONFIG_FAULT_INJECTION */
struct kmem_cache;
#ifdef CONFIG_FAILSLAB
extern bool should_failslab(struct kmem_cache *s, gfp_t gfpflags);
#else

1
include/linux/hrtimer.h
View File

@@ -19,7 +19,6 @@
#include <linux/ktime.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/wait.h>
#include <linux/percpu.h>
#include <linux/timer.h>
#include <linux/timerqueue.h>

1
include/linux/i2c.h
View File

@@ -30,6 +30,7 @@
#include <linux/device.h> /* for struct device */
#include <linux/sched.h> /* for completion */
#include <linux/mutex.h>
#include <linux/rtmutex.h>
#include <linux/irqdomain.h> /* for Host Notify IRQ */
#include <linux/of.h> /* for struct device_node */
#include <linux/swab.h> /* for swab16 */

4
include/linux/init_task.h
View File

@@ -12,8 +12,10 @@
#include <linux/securebits.h>
#include <linux/seqlock.h>
#include <linux/rbtree.h>
#include <linux/sched/autogroup.h>
#include <net/net_namespace.h>
#include <linux/sched/rt.h>
#include <linux/mm_types.h>
#include <asm/thread_info.h>
@@ -149,8 +151,6 @@ extern struct group_info init_groups;
extern struct cred init_cred;
extern struct task_group root_task_group;
#ifdef CONFIG_CGROUP_SCHED
# define INIT_CGROUP_SCHED(tsk) \
.sched_task_group = &root_task_group,

11
include/linux/kasan.h
View File

@@ -1,7 +1,6 @@
#ifndef _LINUX_KASAN_H
#define _LINUX_KASAN_H
#include <linux/sched.h>
#include <linux/types.h>
struct kmem_cache;
@@ -30,16 +29,10 @@ static inline void *kasan_mem_to_shadow(const void *addr)
}
/* Enable reporting bugs after kasan_disable_current() */
static inline void kasan_enable_current(void)
{
current->kasan_depth++;
}
extern void kasan_enable_current(void);
/* Disable reporting bugs for current task */
static inline void kasan_disable_current(void)
{
current->kasan_depth--;
}
extern void kasan_disable_current(void);
void kasan_unpoison_shadow(const void *address, size_t size);

3
include/linux/khugepaged.h
View File

@@ -1,7 +1,8 @@
#ifndef _LINUX_KHUGEPAGED_H
#define _LINUX_KHUGEPAGED_H
#include <linux/sched.h> /* MMF_VM_HUGEPAGE */
#include <linux/sched/coredump.h> /* MMF_VM_HUGEPAGE */
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
extern struct attribute_group khugepaged_attr_group;

1
include/linux/ksm.h
View File

@@ -12,6 +12,7 @@
#include <linux/pagemap.h>
#include <linux/rmap.h>
#include <linux/sched.h>
#include <linux/sched/coredump.h>
struct stable_node;
struct mem_cgroup;

45
include/linux/mm_types.h
View File

@@ -1,9 +1,9 @@
#ifndef _LINUX_MM_TYPES_H
#define _LINUX_MM_TYPES_H
#include <linux/mm_types_task.h>
#include <linux/auxvec.h>
#include <linux/types.h>
#include <linux/threads.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/rbtree.h>
@@ -13,7 +13,7 @@
#include <linux/uprobes.h>
#include <linux/page-flags-layout.h>
#include <linux/workqueue.h>
#include <asm/page.h>
#include <asm/mmu.h>
#ifndef AT_VECTOR_SIZE_ARCH
@@ -24,11 +24,6 @@
struct address_space;
struct mem_cgroup;
#define USE_SPLIT_PTE_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS)
#define USE_SPLIT_PMD_PTLOCKS (USE_SPLIT_PTE_PTLOCKS && \
IS_ENABLED(CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK))
#define ALLOC_SPLIT_PTLOCKS (SPINLOCK_SIZE > BITS_PER_LONG/8)
/*
* Each physical page in the system has a struct page associated with
* it to keep track of whatever it is we are using the page for at the
@@ -231,17 +226,6 @@ struct page {
#endif
;
struct page_frag {
struct page *page;
#if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536)
__u32 offset;
__u32 size;
#else
__u16 offset;
__u16 size;
#endif
};
#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK)
#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE)
@@ -371,27 +355,6 @@ struct core_state {
struct completion startup;
};
enum {
MM_FILEPAGES, /* Resident file mapping pages */
MM_ANONPAGES, /* Resident anonymous pages */
MM_SWAPENTS, /* Anonymous swap entries */
MM_SHMEMPAGES, /* Resident shared memory pages */
NR_MM_COUNTERS
};
#if USE_SPLIT_PTE_PTLOCKS && defined(CONFIG_MMU)
#define SPLIT_RSS_COUNTING
/* per-thread cached information, */
struct task_rss_stat {
int events; /* for synchronization threshold */
int count[NR_MM_COUNTERS];
};
#endif /* USE_SPLIT_PTE_PTLOCKS */
struct mm_rss_stat {
atomic_long_t count[NR_MM_COUNTERS];
};
struct kioctx_table;
struct mm_struct {
struct vm_area_struct *mmap; /* list of VMAs */
@@ -534,6 +497,8 @@ struct mm_struct {
struct work_struct async_put_work;
};
extern struct mm_struct init_mm;
static inline void mm_init_cpumask(struct mm_struct *mm)
{
#ifdef CONFIG_CPUMASK_OFFSTACK

87
include/linux/mm_types_task.h Normal file
View File

@@ -0,0 +1,87 @@
#ifndef _LINUX_MM_TYPES_TASK_H
#define _LINUX_MM_TYPES_TASK_H
/*
* Here are the definitions of the MM data types that are embedded in 'struct task_struct'.
*
* (These are defined separately to decouple sched.h from mm_types.h as much as possible.)
*/
#include <linux/types.h>
#include <linux/threads.h>
#include <linux/atomic.h>
#include <linux/cpumask.h>
#include <asm/page.h>
#define USE_SPLIT_PTE_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS)
#define USE_SPLIT_PMD_PTLOCKS (USE_SPLIT_PTE_PTLOCKS && \
IS_ENABLED(CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK))
#define ALLOC_SPLIT_PTLOCKS (SPINLOCK_SIZE > BITS_PER_LONG/8)
/*
* The per task VMA cache array:
*/
#define VMACACHE_BITS 2
#define VMACACHE_SIZE (1U << VMACACHE_BITS)
#define VMACACHE_MASK (VMACACHE_SIZE - 1)
struct vmacache {
u32 seqnum;
struct vm_area_struct *vmas[VMACACHE_SIZE];
};
enum {
MM_FILEPAGES, /* Resident file mapping pages */
MM_ANONPAGES, /* Resident anonymous pages */
MM_SWAPENTS, /* Anonymous swap entries */
MM_SHMEMPAGES, /* Resident shared memory pages */
NR_MM_COUNTERS
};
#if USE_SPLIT_PTE_PTLOCKS && defined(CONFIG_MMU)
#define SPLIT_RSS_COUNTING
/* per-thread cached information, */
struct task_rss_stat {
int events; /* for synchronization threshold */
int count[NR_MM_COUNTERS];
};
#endif /* USE_SPLIT_PTE_PTLOCKS */
struct mm_rss_stat {
atomic_long_t count[NR_MM_COUNTERS];
};
struct page_frag {
struct page *page;
#if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536)
__u32 offset;
__u32 size;
#else
__u16 offset;
__u16 size;
#endif
};
/* Track pages that require TLB flushes */
struct tlbflush_unmap_batch {
#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
/*
* Each bit set is a CPU that potentially has a TLB entry for one of
* the PFNs being flushed. See set_tlb_ubc_flush_pending().
*/
struct cpumask cpumask;
/* True if any bit in cpumask is set */
bool flush_required;
/*
* If true then the PTE was dirty when unmapped. The entry must be
* flushed before IO is initiated or a stale TLB entry potentially
* allows an update without redirtying the page.
*/
bool writable;
#endif
};
#endif /* _LINUX_MM_TYPES_TASK_H */

37
include/linux/nmi.h
View File

@@ -7,6 +7,43 @@
#include <linux/sched.h>
#include <asm/irq.h>
#ifdef CONFIG_LOCKUP_DETECTOR
extern void touch_softlockup_watchdog_sched(void);
extern void touch_softlockup_watchdog(void);
extern void touch_softlockup_watchdog_sync(void);
extern void touch_all_softlockup_watchdogs(void);
extern int proc_dowatchdog_thresh(struct ctl_table *table, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos);
extern unsigned int softlockup_panic;
extern unsigned int hardlockup_panic;
void lockup_detector_init(void);
#else
static inline void touch_softlockup_watchdog_sched(void)
{
}
static inline void touch_softlockup_watchdog(void)
{
}
static inline void touch_softlockup_watchdog_sync(void)
{
}
static inline void touch_all_softlockup_watchdogs(void)
{
}
static inline void lockup_detector_init(void)
{
}
#endif
#ifdef CONFIG_DETECT_HUNG_TASK
void reset_hung_task_detector(void);
#else
static inline void reset_hung_task_detector(void)
{
}
#endif
/*
* The run state of the lockup detectors is controlled by the content of the
* 'watchdog_enabled' variable. Each lockup detector has its dedicated bit -

2
include/linux/oom.h
View File

@@ -2,7 +2,7 @@
#define __INCLUDE_LINUX_OOM_H
#include <linux/sched.h>
#include <linux/sched/signal.h>
#include <linux/types.h>
#include <linux/nodemask.h>
#include <uapi/linux/oom.h>

2
include/linux/perf_regs.h
View File

@@ -1,6 +1,8 @@
#ifndef _LINUX_PERF_REGS_H
#define _LINUX_PERF_REGS_H
#include <linux/sched/task_stack.h>
struct perf_regs {
__u64 abi;
struct pt_regs *regs;

2
include/linux/pid.h
View File

@@ -1,7 +1,7 @@
#ifndef _LINUX_PID_H
#define _LINUX_PID_H
#include <linux/rcupdate.h>
#include <linux/rculist.h>
enum pid_type
{

21
include/linux/preempt.h
View File

@@ -55,6 +55,27 @@
/* We use the MSB mostly because its available */
#define PREEMPT_NEED_RESCHED 0x80000000
#define PREEMPT_DISABLED (PREEMPT_DISABLE_OFFSET + PREEMPT_ENABLED)
/*
* Disable preemption until the scheduler is running -- use an unconditional
* value so that it also works on !PREEMPT_COUNT kernels.
*
* Reset by start_kernel()->sched_init()->init_idle()->init_idle_preempt_count().
*/
#define INIT_PREEMPT_COUNT PREEMPT_OFFSET
/*
* Initial preempt_count value; reflects the preempt_count schedule invariant
* which states that during context switches:
*
* preempt_count() == 2*PREEMPT_DISABLE_OFFSET
*
* Note: PREEMPT_DISABLE_OFFSET is 0 for !PREEMPT_COUNT kernels.
* Note: See finish_task_switch().
*/
#define FORK_PREEMPT_COUNT (2*PREEMPT_DISABLE_OFFSET + PREEMPT_ENABLED)
/* preempt_count() and related functions, depends on PREEMPT_NEED_RESCHED */
#include <asm/preempt.h>

1
include/linux/ptrace.h
View File

@@ -3,6 +3,7 @@
#include <linux/compiler.h> /* For unlikely. */
#include <linux/sched.h> /* For struct task_struct. */
#include <linux/sched/signal.h> /* For send_sig(), same_thread_group(), etc. */
#include <linux/err.h> /* for IS_ERR_VALUE */
#include <linux/bug.h> /* For BUG_ON. */
#include <linux/pid_namespace.h> /* For task_active_pid_ns. */

40
include/linux/rcupdate.h
View File

@@ -40,7 +40,6 @@
#include <linux/cpumask.h>
#include <linux/seqlock.h>
#include <linux/lockdep.h>
#include <linux/completion.h>
#include <linux/debugobjects.h>
#include <linux/bug.h>
#include <linux/compiler.h>
@@ -226,45 +225,6 @@ void call_rcu_sched(struct rcu_head *head,
void synchronize_sched(void);
/*
* Structure allowing asynchronous waiting on RCU.
*/
struct rcu_synchronize {
struct rcu_head head;
struct completion completion;
};
void wakeme_after_rcu(struct rcu_head *head);
void __wait_rcu_gp(bool checktiny, int n, call_rcu_func_t *crcu_array,
struct rcu_synchronize *rs_array);
#define _wait_rcu_gp(checktiny, ...) \
do { \
call_rcu_func_t __crcu_array[] = { __VA_ARGS__ }; \
struct rcu_synchronize __rs_array[ARRAY_SIZE(__crcu_array)]; \
__wait_rcu_gp(checktiny, ARRAY_SIZE(__crcu_array), \
__crcu_array, __rs_array); \
} while (0)
#define wait_rcu_gp(...) _wait_rcu_gp(false, __VA_ARGS__)
/**
* synchronize_rcu_mult - Wait concurrently for multiple grace periods
* @...: List of call_rcu() functions for the flavors to wait on.
*
* This macro waits concurrently for multiple flavors of RCU grace periods.
* For example, synchronize_rcu_mult(call_rcu, call_rcu_bh) would wait
* on concurrent RCU and RCU-bh grace periods. Waiting on a give SRCU
* domain requires you to write a wrapper function for that SRCU domain's
* call_srcu() function, supplying the corresponding srcu_struct.
*
* If Tiny RCU, tell _wait_rcu_gp() not to bother waiting for RCU
* or RCU-bh, given that anywhere synchronize_rcu_mult() can be called
* is automatically a grace period.
*/
#define synchronize_rcu_mult(...) \
_wait_rcu_gp(IS_ENABLED(CONFIG_TINY_RCU), __VA_ARGS__)
/**
* call_rcu_tasks() - Queue an RCU for invocation task-based grace period
* @head: structure to be used for queueing the RCU updates.

50
include/linux/rcupdate_wait.h Normal file
View File

@@ -0,0 +1,50 @@
#ifndef _LINUX_SCHED_RCUPDATE_WAIT_H
#define _LINUX_SCHED_RCUPDATE_WAIT_H
/*
* RCU synchronization types and methods:
*/
#include <linux/rcupdate.h>
#include <linux/completion.h>
/*
* Structure allowing asynchronous waiting on RCU.
*/
struct rcu_synchronize {
struct rcu_head head;
struct completion completion;
};
void wakeme_after_rcu(struct rcu_head *head);
void __wait_rcu_gp(bool checktiny, int n, call_rcu_func_t *crcu_array,
struct rcu_synchronize *rs_array);
#define _wait_rcu_gp(checktiny, ...) \
do { \
call_rcu_func_t __crcu_array[] = { __VA_ARGS__ }; \
struct rcu_synchronize __rs_array[ARRAY_SIZE(__crcu_array)]; \
__wait_rcu_gp(checktiny, ARRAY_SIZE(__crcu_array), \
__crcu_array, __rs_array); \
} while (0)
#define wait_rcu_gp(...) _wait_rcu_gp(false, __VA_ARGS__)
/**
* synchronize_rcu_mult - Wait concurrently for multiple grace periods
* @...: List of call_rcu() functions for the flavors to wait on.
*
* This macro waits concurrently for multiple flavors of RCU grace periods.
* For example, synchronize_rcu_mult(call_rcu, call_rcu_bh) would wait
* on concurrent RCU and RCU-bh grace periods. Waiting on a give SRCU
* domain requires you to write a wrapper function for that SRCU domain's
* call_srcu() function, supplying the corresponding srcu_struct.
*
* If Tiny RCU, tell _wait_rcu_gp() not to bother waiting for RCU
* or RCU-bh, given that anywhere synchronize_rcu_mult() can be called
* is automatically a grace period.
*/
#define synchronize_rcu_mult(...) \
_wait_rcu_gp(IS_ENABLED(CONFIG_TINY_RCU), __VA_ARGS__)
#endif /* _LINUX_SCHED_RCUPDATE_WAIT_H */

11
include/linux/rcutiny.h
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@@ -53,15 +53,8 @@ static inline void cond_synchronize_sched(unsigned long oldstate)
might_sleep();
}
static inline void rcu_barrier_bh(void)
{
wait_rcu_gp(call_rcu_bh);
}
static inline void rcu_barrier_sched(void)
{
wait_rcu_gp(call_rcu_sched);
}
extern void rcu_barrier_bh(void);
extern void rcu_barrier_sched(void);
static inline void synchronize_rcu_expedited(void)
{

2
include/linux/rhashtable.h
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@@ -25,7 +25,7 @@
#include <linux/list_nulls.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
#include <linux/rcupdate.h>
#include <linux/rculist.h>
/*
* The end of the chain is marked with a special nulls marks which has

3475
include/linux/sched.h
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File diff suppressed because it is too large Load Diff

31
include/linux/sched/autogroup.h Normal file
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@@ -0,0 +1,31 @@
#ifndef _LINUX_SCHED_AUTOGROUP_H
#define _LINUX_SCHED_AUTOGROUP_H
struct signal_struct;
struct task_struct;
struct task_group;
struct seq_file;
#ifdef CONFIG_SCHED_AUTOGROUP
extern void sched_autogroup_create_attach(struct task_struct *p);
extern void sched_autogroup_detach(struct task_struct *p);
extern void sched_autogroup_fork(struct signal_struct *sig);
extern void sched_autogroup_exit(struct signal_struct *sig);
extern void sched_autogroup_exit_task(struct task_struct *p);
#ifdef CONFIG_PROC_FS
extern void proc_sched_autogroup_show_task(struct task_struct *p, struct seq_file *m);
extern int proc_sched_autogroup_set_nice(struct task_struct *p, int nice);
#endif
#else
static inline void sched_autogroup_create_attach(struct task_struct *p) { }
static inline void sched_autogroup_detach(struct task_struct *p) { }
static inline void sched_autogroup_fork(struct signal_struct *sig) { }
static inline void sched_autogroup_exit(struct signal_struct *sig) { }
static inline void sched_autogroup_exit_task(struct task_struct *p) { }
#endif
#ifdef CONFIG_CGROUP_SCHED
extern struct task_group root_task_group;
#endif /* CONFIG_CGROUP_SCHED */
#endif /* _LINUX_SCHED_AUTOGROUP_H */

104
include/linux/sched/clock.h Normal file
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@@ -0,0 +1,104 @@
#ifndef _LINUX_SCHED_CLOCK_H
#define _LINUX_SCHED_CLOCK_H
#include <linux/smp.h>
/*
* Do not use outside of architecture code which knows its limitations.
*
* sched_clock() has no promise of monotonicity or bounded drift between
* CPUs, use (which you should not) requires disabling IRQs.
*
* Please use one of the three interfaces below.
*/
extern unsigned long long notrace sched_clock(void);
/*
* See the comment in kernel/sched/clock.c
*/
extern u64 running_clock(void);
extern u64 sched_clock_cpu(int cpu);
extern void sched_clock_init(void);
#ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
static inline void sched_clock_init_late(void)
{
}
static inline void sched_clock_tick(void)
{
}
static inline void clear_sched_clock_stable(void)
{
}
static inline void sched_clock_idle_sleep_event(void)
{
}
static inline void sched_clock_idle_wakeup_event(u64 delta_ns)
{
}
static inline u64 cpu_clock(int cpu)
{
return sched_clock();
}
static inline u64 local_clock(void)
{
return sched_clock();
}
#else
extern void sched_clock_init_late(void);
/*
* Architectures can set this to 1 if they have specified
* CONFIG_HAVE_UNSTABLE_SCHED_CLOCK in their arch Kconfig,
* but then during bootup it turns out that sched_clock()
* is reliable after all:
*/
extern int sched_clock_stable(void);
extern void clear_sched_clock_stable(void);
extern void sched_clock_tick(void);
extern void sched_clock_idle_sleep_event(void);
extern void sched_clock_idle_wakeup_event(u64 delta_ns);
/*
* As outlined in clock.c, provides a fast, high resolution, nanosecond
* time source that is monotonic per cpu argument and has bounded drift
* between cpus.
*
* ######################### BIG FAT WARNING ##########################
* # when comparing cpu_clock(i) to cpu_clock(j) for i != j, time can #
* # go backwards !! #
* ####################################################################
*/
static inline u64 cpu_clock(int cpu)
{
return sched_clock_cpu(cpu);
}
static inline u64 local_clock(void)
{
return sched_clock_cpu(raw_smp_processor_id());
}
#endif
#ifdef CONFIG_IRQ_TIME_ACCOUNTING
/*
* An i/f to runtime opt-in for irq time accounting based off of sched_clock.
* The reason for this explicit opt-in is not to have perf penalty with
* slow sched_clocks.
*/
extern void enable_sched_clock_irqtime(void);
extern void disable_sched_clock_irqtime(void);
#else
static inline void enable_sched_clock_irqtime(void) {}
static inline void disable_sched_clock_irqtime(void) {}
#endif
#endif /* _LINUX_SCHED_CLOCK_H */

74
include/linux/sched/coredump.h Normal file
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@@ -0,0 +1,74 @@
#ifndef _LINUX_SCHED_COREDUMP_H
#define _LINUX_SCHED_COREDUMP_H
#include <linux/mm_types.h>
#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
#define SUID_DUMP_USER 1 /* Dump as user of process */
#define SUID_DUMP_ROOT 2 /* Dump as root */
/* mm flags */
/* for SUID_DUMP_* above */
#define MMF_DUMPABLE_BITS 2
#define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)
extern void set_dumpable(struct mm_struct *mm, int value);
/*
* This returns the actual value of the suid_dumpable flag. For things
* that are using this for checking for privilege transitions, it must
* test against SUID_DUMP_USER rather than treating it as a boolean
* value.
*/
static inline int __get_dumpable(unsigned long mm_flags)
{
return mm_flags & MMF_DUMPABLE_MASK;
}
static inline int get_dumpable(struct mm_struct *mm)
{
return __get_dumpable(mm->flags);
}
/* coredump filter bits */
#define MMF_DUMP_ANON_PRIVATE 2
#define MMF_DUMP_ANON_SHARED 3
#define MMF_DUMP_MAPPED_PRIVATE 4
#define MMF_DUMP_MAPPED_SHARED 5
#define MMF_DUMP_ELF_HEADERS 6
#define MMF_DUMP_HUGETLB_PRIVATE 7
#define MMF_DUMP_HUGETLB_SHARED 8
#define MMF_DUMP_DAX_PRIVATE 9
#define MMF_DUMP_DAX_SHARED 10
#define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS
#define MMF_DUMP_FILTER_BITS 9
#define MMF_DUMP_FILTER_MASK \
(((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
#define MMF_DUMP_FILTER_DEFAULT \
((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\
(1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF)
#ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
# define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS)
#else
# define MMF_DUMP_MASK_DEFAULT_ELF 0
#endif
/* leave room for more dump flags */
#define MMF_VM_MERGEABLE 16 /* KSM may merge identical pages */
#define MMF_VM_HUGEPAGE 17 /* set when VM_HUGEPAGE is set on vma */
/*
* This one-shot flag is dropped due to necessity of changing exe once again
* on NFS restore
*/
//#define MMF_EXE_FILE_CHANGED 18 /* see prctl_set_mm_exe_file() */
#define MMF_HAS_UPROBES 19 /* has uprobes */
#define MMF_RECALC_UPROBES 20 /* MMF_HAS_UPROBES can be wrong */
#define MMF_OOM_SKIP 21 /* mm is of no interest for the OOM killer */
#define MMF_UNSTABLE 22 /* mm is unstable for copy_from_user */
#define MMF_HUGE_ZERO_PAGE 23 /* mm has ever used the global huge zero page */
#define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK)
#endif /* _LINUX_SCHED_COREDUMP_H */

27
include/linux/sched/cpufreq.h Normal file
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@@ -0,0 +1,27 @@
#ifndef _LINUX_SCHED_CPUFREQ_H
#define _LINUX_SCHED_CPUFREQ_H
#include <linux/types.h>
/*
* Interface between cpufreq drivers and the scheduler:
*/
#define SCHED_CPUFREQ_RT (1U << 0)
#define SCHED_CPUFREQ_DL (1U << 1)
#define SCHED_CPUFREQ_IOWAIT (1U << 2)
#define SCHED_CPUFREQ_RT_DL (SCHED_CPUFREQ_RT | SCHED_CPUFREQ_DL)
#ifdef CONFIG_CPU_FREQ
struct update_util_data {
void (*func)(struct update_util_data *data, u64 time, unsigned int flags);
};
void cpufreq_add_update_util_hook(int cpu, struct update_util_data *data,
void (*func)(struct update_util_data *data, u64 time,
unsigned int flags));
void cpufreq_remove_update_util_hook(int cpu);
#endif /* CONFIG_CPU_FREQ */
#endif /* _LINUX_SCHED_CPUFREQ_H */

187
include/linux/sched/cputime.h Normal file
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@@ -0,0 +1,187 @@
#ifndef _LINUX_SCHED_CPUTIME_H
#define _LINUX_SCHED_CPUTIME_H
#include <linux/sched/signal.h>
/*
* cputime accounting APIs:
*/
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
#include <asm/cputime.h>
#ifndef cputime_to_nsecs
# define cputime_to_nsecs(__ct) \
(cputime_to_usecs(__ct) * NSEC_PER_USEC)
#endif
#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
extern void task_cputime(struct task_struct *t,
u64 *utime, u64 *stime);
extern u64 task_gtime(struct task_struct *t);
#else
static inline void task_cputime(struct task_struct *t,
u64 *utime, u64 *stime)
{
*utime = t->utime;
*stime = t->stime;
}
static inline u64 task_gtime(struct task_struct *t)
{
return t->gtime;
}
#endif
#ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME
static inline void task_cputime_scaled(struct task_struct *t,
u64 *utimescaled,
u64 *stimescaled)
{
*utimescaled = t->utimescaled;
*stimescaled = t->stimescaled;
}
#else
static inline void task_cputime_scaled(struct task_struct *t,
u64 *utimescaled,
u64 *stimescaled)
{
task_cputime(t, utimescaled, stimescaled);
}
#endif
extern void task_cputime_adjusted(struct task_struct *p, u64 *ut, u64 *st);
extern void thread_group_cputime_adjusted(struct task_struct *p, u64 *ut, u64 *st);
/*
* Thread group CPU time accounting.
*/
void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times);
void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times);
/*
* The following are functions that support scheduler-internal time accounting.
* These functions are generally called at the timer tick. None of this depends
* on CONFIG_SCHEDSTATS.
*/
/**
* get_running_cputimer - return &tsk->signal->cputimer if cputimer is running
*
* @tsk: Pointer to target task.
*/
#ifdef CONFIG_POSIX_TIMERS
static inline
struct thread_group_cputimer *get_running_cputimer(struct task_struct *tsk)
{
struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;
/* Check if cputimer isn't running. This is accessed without locking. */
if (!READ_ONCE(cputimer->running))
return NULL;
/*
* After we flush the task's sum_exec_runtime to sig->sum_sched_runtime
* in __exit_signal(), we won't account to the signal struct further
* cputime consumed by that task, even though the task can still be
* ticking after __exit_signal().
*
* In order to keep a consistent behaviour between thread group cputime
* and thread group cputimer accounting, lets also ignore the cputime
* elapsing after __exit_signal() in any thread group timer running.
*
* This makes sure that POSIX CPU clocks and timers are synchronized, so
* that a POSIX CPU timer won't expire while the corresponding POSIX CPU
* clock delta is behind the expiring timer value.
*/
if (unlikely(!tsk->sighand))
return NULL;
return cputimer;
}
#else
static inline
struct thread_group_cputimer *get_running_cputimer(struct task_struct *tsk)
{
return NULL;
}
#endif
/**
* account_group_user_time - Maintain utime for a thread group.
*
* @tsk: Pointer to task structure.
* @cputime: Time value by which to increment the utime field of the
* thread_group_cputime structure.
*
* If thread group time is being maintained, get the structure for the
* running CPU and update the utime field there.
*/
static inline void account_group_user_time(struct task_struct *tsk,
u64 cputime)
{
struct thread_group_cputimer *cputimer = get_running_cputimer(tsk);
if (!cputimer)
return;
atomic64_add(cputime, &cputimer->cputime_atomic.utime);
}
/**
* account_group_system_time - Maintain stime for a thread group.
*
* @tsk: Pointer to task structure.
* @cputime: Time value by which to increment the stime field of the
* thread_group_cputime structure.
*
* If thread group time is being maintained, get the structure for the
* running CPU and update the stime field there.
*/
static inline void account_group_system_time(struct task_struct *tsk,
u64 cputime)
{
struct thread_group_cputimer *cputimer = get_running_cputimer(tsk);
if (!cputimer)
return;
atomic64_add(cputime, &cputimer->cputime_atomic.stime);
}
/**
* account_group_exec_runtime - Maintain exec runtime for a thread group.
*
* @tsk: Pointer to task structure.
* @ns: Time value by which to increment the sum_exec_runtime field
* of the thread_group_cputime structure.
*
* If thread group time is being maintained, get the structure for the
* running CPU and update the sum_exec_runtime field there.
*/
static inline void account_group_exec_runtime(struct task_struct *tsk,
unsigned long long ns)
{
struct thread_group_cputimer *cputimer = get_running_cputimer(tsk);
if (!cputimer)
return;
atomic64_add(ns, &cputimer->cputime_atomic.sum_exec_runtime);
}
static inline void prev_cputime_init(struct prev_cputime *prev)
{
#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
prev->utime = prev->stime = 0;
raw_spin_lock_init(&prev->lock);
#endif
}
extern unsigned long long
task_sched_runtime(struct task_struct *task);
#endif /* _LINUX_SCHED_CPUTIME_H */

8
include/linux/sched/deadline.h
View File

@@ -1,5 +1,7 @@
#ifndef _SCHED_DEADLINE_H
#define _SCHED_DEADLINE_H
#ifndef _LINUX_SCHED_DEADLINE_H
#define _LINUX_SCHED_DEADLINE_H
#include <linux/sched.h>
/*
* SCHED_DEADLINE tasks has negative priorities, reflecting
@@ -26,4 +28,4 @@ static inline bool dl_time_before(u64 a, u64 b)
return (s64)(a - b) < 0;
}
#endif /* _SCHED_DEADLINE_H */
#endif /* _LINUX_SCHED_DEADLINE_H */

50
include/linux/sched/debug.h Normal file
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@@ -0,0 +1,50 @@
#ifndef _LINUX_SCHED_DEBUG_H
#define _LINUX_SCHED_DEBUG_H
/*
* Various scheduler/task debugging interfaces:
*/
struct task_struct;
extern void dump_cpu_task(int cpu);
/*
* Only dump TASK_* tasks. (0 for all tasks)
*/
extern void show_state_filter(unsigned long state_filter);
static inline void show_state(void)
{
show_state_filter(0);
}
struct pt_regs;
extern void show_regs(struct pt_regs *);
/*
* TASK is a pointer to the task whose backtrace we want to see (or NULL for current
* task), SP is the stack pointer of the first frame that should be shown in the back
* trace (or NULL if the entire call-chain of the task should be shown).
*/
extern void show_stack(struct task_struct *task, unsigned long *sp);
extern void sched_show_task(struct task_struct *p);
#ifdef CONFIG_SCHED_DEBUG
struct seq_file;
extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m);
extern void proc_sched_set_task(struct task_struct *p);
#endif
/* Attach to any functions which should be ignored in wchan output. */
#define __sched __attribute__((__section__(".sched.text")))
/* Linker adds these: start and end of __sched functions */
extern char __sched_text_start[], __sched_text_end[];
/* Is this address in the __sched functions? */
extern int in_sched_functions(unsigned long addr);
#endif /* _LINUX_SCHED_DEBUG_H */

24
include/linux/sched/hotplug.h Normal file
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@@ -0,0 +1,24 @@
#ifndef _LINUX_SCHED_HOTPLUG_H
#define _LINUX_SCHED_HOTPLUG_H
/*
* Scheduler interfaces for hotplug CPU support:
*/
extern int sched_cpu_starting(unsigned int cpu);
extern int sched_cpu_activate(unsigned int cpu);
extern int sched_cpu_deactivate(unsigned int cpu);
#ifdef CONFIG_HOTPLUG_CPU
extern int sched_cpu_dying(unsigned int cpu);
#else
# define sched_cpu_dying NULL
#endif
#ifdef CONFIG_HOTPLUG_CPU
extern void idle_task_exit(void);
#else
static inline void idle_task_exit(void) {}
#endif
#endif /* _LINUX_SCHED_HOTPLUG_H */

86
include/linux/sched/idle.h Normal file
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@@ -0,0 +1,86 @@
#ifndef _LINUX_SCHED_IDLE_H
#define _LINUX_SCHED_IDLE_H
#include <linux/sched.h>
enum cpu_idle_type {
CPU_IDLE,
CPU_NOT_IDLE,
CPU_NEWLY_IDLE,
CPU_MAX_IDLE_TYPES
};
extern void wake_up_if_idle(int cpu);
/*
* Idle thread specific functions to determine the need_resched
* polling state.
*/
#ifdef TIF_POLLING_NRFLAG
static inline void __current_set_polling(void)
{
set_thread_flag(TIF_POLLING_NRFLAG);
}
static inline bool __must_check current_set_polling_and_test(void)
{
__current_set_polling();
/*
* Polling state must be visible before we test NEED_RESCHED,
* paired by resched_curr()
*/
smp_mb__after_atomic();
return unlikely(tif_need_resched());
}
static inline void __current_clr_polling(void)
{
clear_thread_flag(TIF_POLLING_NRFLAG);
}
static inline bool __must_check current_clr_polling_and_test(void)
{
__current_clr_polling();
/*
* Polling state must be visible before we test NEED_RESCHED,
* paired by resched_curr()
*/
smp_mb__after_atomic();
return unlikely(tif_need_resched());
}
#else
static inline void __current_set_polling(void) { }
static inline void __current_clr_polling(void) { }
static inline bool __must_check current_set_polling_and_test(void)
{
return unlikely(tif_need_resched());
}
static inline bool __must_check current_clr_polling_and_test(void)
{
return unlikely(tif_need_resched());
}
#endif
static inline void current_clr_polling(void)
{
__current_clr_polling();
/*
* Ensure we check TIF_NEED_RESCHED after we clear the polling bit.
* Once the bit is cleared, we'll get IPIs with every new
* TIF_NEED_RESCHED and the IPI handler, scheduler_ipi(), will also
* fold.
*/
smp_mb(); /* paired with resched_curr() */
preempt_fold_need_resched();
}
#endif /* _LINUX_SCHED_IDLE_H */

11
include/linux/sched/init.h Normal file
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@@ -0,0 +1,11 @@
#ifndef _LINUX_SCHED_INIT_H
#define _LINUX_SCHED_INIT_H
/*
* Scheduler init related prototypes:
*/
extern void sched_init(void);
extern void sched_init_smp(void);
#endif /* _LINUX_SCHED_INIT_H */

36
include/linux/sched/jobctl.h Normal file
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@@ -0,0 +1,36 @@
#ifndef _LINUX_SCHED_JOBCTL_H
#define _LINUX_SCHED_JOBCTL_H
#include <linux/types.h>
struct task_struct;
/*
* task->jobctl flags
*/
#define JOBCTL_STOP_SIGMASK 0xffff /* signr of the last group stop */
#define JOBCTL_STOP_DEQUEUED_BIT 16 /* stop signal dequeued */
#define JOBCTL_STOP_PENDING_BIT 17 /* task should stop for group stop */
#define JOBCTL_STOP_CONSUME_BIT 18 /* consume group stop count */
#define JOBCTL_TRAP_STOP_BIT 19 /* trap for STOP */
#define JOBCTL_TRAP_NOTIFY_BIT 20 /* trap for NOTIFY */
#define JOBCTL_TRAPPING_BIT 21 /* switching to TRACED */
#define JOBCTL_LISTENING_BIT 22 /* ptracer is listening for events */
#define JOBCTL_STOP_DEQUEUED (1UL << JOBCTL_STOP_DEQUEUED_BIT)
#define JOBCTL_STOP_PENDING (1UL << JOBCTL_STOP_PENDING_BIT)
#define JOBCTL_STOP_CONSUME (1UL << JOBCTL_STOP_CONSUME_BIT)
#define JOBCTL_TRAP_STOP (1UL << JOBCTL_TRAP_STOP_BIT)
#define JOBCTL_TRAP_NOTIFY (1UL << JOBCTL_TRAP_NOTIFY_BIT)
#define JOBCTL_TRAPPING (1UL << JOBCTL_TRAPPING_BIT)
#define JOBCTL_LISTENING (1UL << JOBCTL_LISTENING_BIT)
#define JOBCTL_TRAP_MASK (JOBCTL_TRAP_STOP | JOBCTL_TRAP_NOTIFY)
#define JOBCTL_PENDING_MASK (JOBCTL_STOP_PENDING | JOBCTL_TRAP_MASK)
extern bool task_set_jobctl_pending(struct task_struct *task, unsigned long mask);
extern void task_clear_jobctl_trapping(struct task_struct *task);
extern void task_clear_jobctl_pending(struct task_struct *task, unsigned long mask);
#endif /* _LINUX_SCHED_JOBCTL_H */

31
include/linux/sched/loadavg.h Normal file
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@@ -0,0 +1,31 @@
#ifndef _LINUX_SCHED_LOADAVG_H
#define _LINUX_SCHED_LOADAVG_H
/*
* These are the constant used to fake the fixed-point load-average
* counting. Some notes:
* - 11 bit fractions expand to 22 bits by the multiplies: this gives
* a load-average precision of 10 bits integer + 11 bits fractional
* - if you want to count load-averages more often, you need more
* precision, or rounding will get you. With 2-second counting freq,
* the EXP_n values would be 1981, 2034 and 2043 if still using only
* 11 bit fractions.
*/
extern unsigned long avenrun[]; /* Load averages */
extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift);
#define FSHIFT 11 /* nr of bits of precision */
#define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */
#define LOAD_FREQ (5*HZ+1) /* 5 sec intervals */
#define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */
#define EXP_5 2014 /* 1/exp(5sec/5min) */
#define EXP_15 2037 /* 1/exp(5sec/15min) */
#define CALC_LOAD(load,exp,n) \
load *= exp; \
load += n*(FIXED_1-exp); \
load >>= FSHIFT;
extern void calc_global_load(unsigned long ticks);
#endif /* _LINUX_SCHED_LOADAVG_H */

174
include/linux/sched/mm.h Normal file
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@@ -0,0 +1,174 @@
#ifndef _LINUX_SCHED_MM_H
#define _LINUX_SCHED_MM_H
#include <linux/kernel.h>
#include <linux/atomic.h>
#include <linux/sched.h>
#include <linux/mm_types.h>
#include <linux/gfp.h>
/*
* Routines for handling mm_structs
*/
extern struct mm_struct * mm_alloc(void);
/**
* mmgrab() - Pin a &struct mm_struct.
* @mm: The &struct mm_struct to pin.
*
* Make sure that @mm will not get freed even after the owning task
* exits. This doesn't guarantee that the associated address space
* will still exist later on and mmget_not_zero() has to be used before
* accessing it.
*
* This is a preferred way to to pin @mm for a longer/unbounded amount
* of time.
*
* Use mmdrop() to release the reference acquired by mmgrab().
*
* See also <Documentation/vm/active_mm.txt> for an in-depth explanation
* of &mm_struct.mm_count vs &mm_struct.mm_users.
*/
static inline void mmgrab(struct mm_struct *mm)
{
atomic_inc(&mm->mm_count);
}
/* mmdrop drops the mm and the page tables */
extern void __mmdrop(struct mm_struct *);
static inline void mmdrop(struct mm_struct *mm)
{
if (unlikely(atomic_dec_and_test(&mm->mm_count)))
__mmdrop(mm);
}
static inline void mmdrop_async_fn(struct work_struct *work)
{
struct mm_struct *mm = container_of(work, struct mm_struct, async_put_work);
__mmdrop(mm);
}
static inline void mmdrop_async(struct mm_struct *mm)
{
if (unlikely(atomic_dec_and_test(&mm->mm_count))) {
INIT_WORK(&mm->async_put_work, mmdrop_async_fn);
schedule_work(&mm->async_put_work);
}
}
/**
* mmget() - Pin the address space associated with a &struct mm_struct.
* @mm: The address space to pin.
*
* Make sure that the address space of the given &struct mm_struct doesn't
* go away. This does not protect against parts of the address space being
* modified or freed, however.
*
* Never use this function to pin this address space for an
* unbounded/indefinite amount of time.
*
* Use mmput() to release the reference acquired by mmget().
*
* See also <Documentation/vm/active_mm.txt> for an in-depth explanation
* of &mm_struct.mm_count vs &mm_struct.mm_users.
*/
static inline void mmget(struct mm_struct *mm)
{
atomic_inc(&mm->mm_users);
}
static inline bool mmget_not_zero(struct mm_struct *mm)
{
return atomic_inc_not_zero(&mm->mm_users);
}
/* mmput gets rid of the mappings and all user-space */
extern void mmput(struct mm_struct *);
#ifdef CONFIG_MMU
/* same as above but performs the slow path from the async context. Can
* be called from the atomic context as well
*/
extern void mmput_async(struct mm_struct *);
#endif
/* Grab a reference to a task's mm, if it is not already going away */
extern struct mm_struct *get_task_mm(struct task_struct *task);
/*
* Grab a reference to a task's mm, if it is not already going away
* and ptrace_may_access with the mode parameter passed to it
* succeeds.
*/
extern struct mm_struct *mm_access(struct task_struct *task, unsigned int mode);
/* Remove the current tasks stale references to the old mm_struct */
extern void mm_release(struct task_struct *, struct mm_struct *);
#ifdef CONFIG_MEMCG
extern void mm_update_next_owner(struct mm_struct *mm);
#else
static inline void mm_update_next_owner(struct mm_struct *mm)
{
}
#endif /* CONFIG_MEMCG */
#ifdef CONFIG_MMU
extern void arch_pick_mmap_layout(struct mm_struct *mm);
extern unsigned long
arch_get_unmapped_area(struct file *, unsigned long, unsigned long,
unsigned long, unsigned long);
extern unsigned long
arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
unsigned long len, unsigned long pgoff,
unsigned long flags);
#else
static inline void arch_pick_mmap_layout(struct mm_struct *mm) {}
#endif
static inline bool in_vfork(struct task_struct *tsk)
{
bool ret;
/*
* need RCU to access ->real_parent if CLONE_VM was used along with
* CLONE_PARENT.
*
* We check real_parent->mm == tsk->mm because CLONE_VFORK does not
* imply CLONE_VM
*
* CLONE_VFORK can be used with CLONE_PARENT/CLONE_THREAD and thus
* ->real_parent is not necessarily the task doing vfork(), so in
* theory we can't rely on task_lock() if we want to dereference it.
*
* And in this case we can't trust the real_parent->mm == tsk->mm
* check, it can be false negative. But we do not care, if init or
* another oom-unkillable task does this it should blame itself.
*/
rcu_read_lock();
ret = tsk->vfork_done && tsk->real_parent->mm == tsk->mm;
rcu_read_unlock();
return ret;
}
/* __GFP_IO isn't allowed if PF_MEMALLOC_NOIO is set in current->flags
* __GFP_FS is also cleared as it implies __GFP_IO.
*/
static inline gfp_t memalloc_noio_flags(gfp_t flags)
{
if (unlikely(current->flags & PF_MEMALLOC_NOIO))
flags &= ~(__GFP_IO | __GFP_FS);
return flags;
}
static inline unsigned int memalloc_noio_save(void)
{
unsigned int flags = current->flags & PF_MEMALLOC_NOIO;
current->flags |= PF_MEMALLOC_NOIO;
return flags;
}
static inline void memalloc_noio_restore(unsigned int flags)
{
current->flags = (current->flags & ~PF_MEMALLOC_NOIO) | flags;
}
#endif /* _LINUX_SCHED_MM_H */

43
include/linux/sched/nohz.h Normal file
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@@ -0,0 +1,43 @@
#ifndef _LINUX_SCHED_NOHZ_H
#define _LINUX_SCHED_NOHZ_H
/*
* This is the interface between the scheduler and nohz/dyntics:
*/
#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
extern void cpu_load_update_nohz_start(void);
extern void cpu_load_update_nohz_stop(void);
#else
static inline void cpu_load_update_nohz_start(void) { }
static inline void cpu_load_update_nohz_stop(void) { }
#endif
#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
extern void nohz_balance_enter_idle(int cpu);
extern void set_cpu_sd_state_idle(void);
extern int get_nohz_timer_target(void);
#else
static inline void nohz_balance_enter_idle(int cpu) { }
static inline void set_cpu_sd_state_idle(void) { }
#endif
#ifdef CONFIG_NO_HZ_COMMON
void calc_load_enter_idle(void);
void calc_load_exit_idle(void);
#else
static inline void calc_load_enter_idle(void) { }
static inline void calc_load_exit_idle(void) { }
#endif /* CONFIG_NO_HZ_COMMON */
#if defined(CONFIG_NO_HZ_COMMON) && defined(CONFIG_SMP)
extern void wake_up_nohz_cpu(int cpu);
#else
static inline void wake_up_nohz_cpu(int cpu) { }
#endif
#ifdef CONFIG_NO_HZ_FULL
extern u64 scheduler_tick_max_deferment(void);
#endif
#endif /* _LINUX_SCHED_NOHZ_H */

46
include/linux/sched/numa_balancing.h Normal file
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@@ -0,0 +1,46 @@
#ifndef _LINUX_SCHED_NUMA_BALANCING_H
#define _LINUX_SCHED_NUMA_BALANCING_H
/*
* This is the interface between the scheduler and the MM that
* implements memory access pattern based NUMA-balancing:
*/
#include <linux/sched.h>
#define TNF_MIGRATED 0x01
#define TNF_NO_GROUP 0x02
#define TNF_SHARED 0x04
#define TNF_FAULT_LOCAL 0x08
#define TNF_MIGRATE_FAIL 0x10
#ifdef CONFIG_NUMA_BALANCING
extern void task_numa_fault(int last_node, int node, int pages, int flags);
extern pid_t task_numa_group_id(struct task_struct *p);
extern void set_numabalancing_state(bool enabled);
extern void task_numa_free(struct task_struct *p);
extern bool should_numa_migrate_memory(struct task_struct *p, struct page *page,
int src_nid, int dst_cpu);
#else
static inline void task_numa_fault(int last_node, int node, int pages,
int flags)
{
}
static inline pid_t task_numa_group_id(struct task_struct *p)
{
return 0;
}
static inline void set_numabalancing_state(bool enabled)
{
}
static inline void task_numa_free(struct task_struct *p)
{
}
static inline bool should_numa_migrate_memory(struct task_struct *p,
struct page *page, int src_nid, int dst_cpu)
{
return true;
}
#endif
#endif /* _LINUX_SCHED_NUMA_BALANCING_H */

6
include/linux/sched/prio.h
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@@ -1,5 +1,5 @@
#ifndef _SCHED_PRIO_H
#define _SCHED_PRIO_H
#ifndef _LINUX_SCHED_PRIO_H
#define _LINUX_SCHED_PRIO_H
#define MAX_NICE 19
#define MIN_NICE -20
@@ -57,4 +57,4 @@ static inline long rlimit_to_nice(long prio)
return (MAX_NICE - prio + 1);
}
#endif /* _SCHED_PRIO_H */
#endif /* _LINUX_SCHED_PRIO_H */

10
include/linux/sched/rt.h
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@@ -1,7 +1,9 @@
#ifndef _SCHED_RT_H
#define _SCHED_RT_H
#ifndef _LINUX_SCHED_RT_H
#define _LINUX_SCHED_RT_H
#include <linux/sched/prio.h>
#include <linux/sched.h>
struct task_struct;
static inline int rt_prio(int prio)
{
@@ -57,4 +59,4 @@ extern void normalize_rt_tasks(void);
*/
#define RR_TIMESLICE (100 * HZ / 1000)
#endif /* _SCHED_RT_H */
#endif /* _LINUX_SCHED_RT_H */

613
include/linux/sched/signal.h Normal file
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@@ -0,0 +1,613 @@
#ifndef _LINUX_SCHED_SIGNAL_H
#define _LINUX_SCHED_SIGNAL_H
#include <linux/rculist.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/sched/jobctl.h>
#include <linux/sched/task.h>
#include <linux/cred.h>
/*
* Types defining task->signal and task->sighand and APIs using them:
*/
struct sighand_struct {
atomic_t count;
struct k_sigaction action[_NSIG];
spinlock_t siglock;
wait_queue_head_t signalfd_wqh;
};
/*
* Per-process accounting stats:
*/
struct pacct_struct {
int ac_flag;
long ac_exitcode;
unsigned long ac_mem;
u64 ac_utime, ac_stime;
unsigned long ac_minflt, ac_majflt;
};
struct cpu_itimer {
u64 expires;
u64 incr;
};
/*
* This is the atomic variant of task_cputime, which can be used for
* storing and updating task_cputime statistics without locking.
*/
struct task_cputime_atomic {
atomic64_t utime;
atomic64_t stime;
atomic64_t sum_exec_runtime;
};
#define INIT_CPUTIME_ATOMIC \
(struct task_cputime_atomic) { \
.utime = ATOMIC64_INIT(0), \
.stime = ATOMIC64_INIT(0), \
.sum_exec_runtime = ATOMIC64_INIT(0), \
}
/**
* struct thread_group_cputimer - thread group interval timer counts
* @cputime_atomic: atomic thread group interval timers.
* @running: true when there are timers running and
* @cputime_atomic receives updates.
* @checking_timer: true when a thread in the group is in the
* process of checking for thread group timers.
*
* This structure contains the version of task_cputime, above, that is
* used for thread group CPU timer calculations.
*/
struct thread_group_cputimer {
struct task_cputime_atomic cputime_atomic;
bool running;
bool checking_timer;
};
/*
* NOTE! "signal_struct" does not have its own
* locking, because a shared signal_struct always
* implies a shared sighand_struct, so locking
* sighand_struct is always a proper superset of
* the locking of signal_struct.
*/
struct signal_struct {
atomic_t sigcnt;
atomic_t live;
int nr_threads;
struct list_head thread_head;
wait_queue_head_t wait_chldexit; /* for wait4() */
/* current thread group signal load-balancing target: */
struct task_struct *curr_target;
/* shared signal handling: */
struct sigpending shared_pending;
/* thread group exit support */
int group_exit_code;
/* overloaded:
* - notify group_exit_task when ->count is equal to notify_count
* - everyone except group_exit_task is stopped during signal delivery
* of fatal signals, group_exit_task processes the signal.
*/
int notify_count;
struct task_struct *group_exit_task;
/* thread group stop support, overloads group_exit_code too */
int group_stop_count;
unsigned int flags; /* see SIGNAL_* flags below */
/*
* PR_SET_CHILD_SUBREAPER marks a process, like a service
* manager, to re-parent orphan (double-forking) child processes
* to this process instead of 'init'. The service manager is
* able to receive SIGCHLD signals and is able to investigate
* the process until it calls wait(). All children of this
* process will inherit a flag if they should look for a
* child_subreaper process at exit.
*/
unsigned int is_child_subreaper:1;
unsigned int has_child_subreaper:1;
#ifdef CONFIG_POSIX_TIMERS
/* POSIX.1b Interval Timers */
int posix_timer_id;
struct list_head posix_timers;
/* ITIMER_REAL timer for the process */
struct hrtimer real_timer;
ktime_t it_real_incr;
/*
* ITIMER_PROF and ITIMER_VIRTUAL timers for the process, we use
* CPUCLOCK_PROF and CPUCLOCK_VIRT for indexing array as these
* values are defined to 0 and 1 respectively
*/
struct cpu_itimer it[2];
/*
* Thread group totals for process CPU timers.
* See thread_group_cputimer(), et al, for details.
*/
struct thread_group_cputimer cputimer;
/* Earliest-expiration cache. */
struct task_cputime cputime_expires;
struct list_head cpu_timers[3];
#endif
struct pid *leader_pid;
#ifdef CONFIG_NO_HZ_FULL
atomic_t tick_dep_mask;
#endif
struct pid *tty_old_pgrp;
/* boolean value for session group leader */
int leader;
struct tty_struct *tty; /* NULL if no tty */
#ifdef CONFIG_SCHED_AUTOGROUP
struct autogroup *autogroup;
#endif
/*
* Cumulative resource counters for dead threads in the group,
* and for reaped dead child processes forked by this group.
* Live threads maintain their own counters and add to these
* in __exit_signal, except for the group leader.
*/
seqlock_t stats_lock;
u64 utime, stime, cutime, cstime;
u64 gtime;
u64 cgtime;
struct prev_cputime prev_cputime;
unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
unsigned long inblock, oublock, cinblock, coublock;
unsigned long maxrss, cmaxrss;
struct task_io_accounting ioac;
/*
* Cumulative ns of schedule CPU time fo dead threads in the
* group, not including a zombie group leader, (This only differs
* from jiffies_to_ns(utime + stime) if sched_clock uses something
* other than jiffies.)
*/
unsigned long long sum_sched_runtime;
/*
* We don't bother to synchronize most readers of this at all,
* because there is no reader checking a limit that actually needs
* to get both rlim_cur and rlim_max atomically, and either one
* alone is a single word that can safely be read normally.
* getrlimit/setrlimit use task_lock(current->group_leader) to
* protect this instead of the siglock, because they really
* have no need to disable irqs.
*/
struct rlimit rlim[RLIM_NLIMITS];
#ifdef CONFIG_BSD_PROCESS_ACCT
struct pacct_struct pacct; /* per-process accounting information */
#endif
#ifdef CONFIG_TASKSTATS
struct taskstats *stats;
#endif
#ifdef CONFIG_AUDIT
unsigned audit_tty;
struct tty_audit_buf *tty_audit_buf;
#endif
/*
* Thread is the potential origin of an oom condition; kill first on
* oom
*/
bool oom_flag_origin;
short oom_score_adj; /* OOM kill score adjustment */
short oom_score_adj_min; /* OOM kill score adjustment min value.
* Only settable by CAP_SYS_RESOURCE. */
struct mm_struct *oom_mm; /* recorded mm when the thread group got
* killed by the oom killer */
struct mutex cred_guard_mutex; /* guard against foreign influences on
* credential calculations
* (notably. ptrace) */
};
/*
* Bits in flags field of signal_struct.
*/
#define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */
#define SIGNAL_STOP_CONTINUED 0x00000002 /* SIGCONT since WCONTINUED reap */
#define SIGNAL_GROUP_EXIT 0x00000004 /* group exit in progress */
#define SIGNAL_GROUP_COREDUMP 0x00000008 /* coredump in progress */
/*
* Pending notifications to parent.
*/
#define SIGNAL_CLD_STOPPED 0x00000010
#define SIGNAL_CLD_CONTINUED 0x00000020
#define SIGNAL_CLD_MASK (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED)
#define SIGNAL_UNKILLABLE 0x00000040 /* for init: ignore fatal signals */
#define SIGNAL_STOP_MASK (SIGNAL_CLD_MASK | SIGNAL_STOP_STOPPED | \
SIGNAL_STOP_CONTINUED)
static inline void signal_set_stop_flags(struct signal_struct *sig,
unsigned int flags)
{
WARN_ON(sig->flags & (SIGNAL_GROUP_EXIT|SIGNAL_GROUP_COREDUMP));
sig->flags = (sig->flags & ~SIGNAL_STOP_MASK) | flags;
}
/* If true, all threads except ->group_exit_task have pending SIGKILL */
static inline int signal_group_exit(const struct signal_struct *sig)
{
return (sig->flags & SIGNAL_GROUP_EXIT) ||
(sig->group_exit_task != NULL);
}
extern void flush_signals(struct task_struct *);
extern void ignore_signals(struct task_struct *);
extern void flush_signal_handlers(struct task_struct *, int force_default);
extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
static inline int kernel_dequeue_signal(siginfo_t *info)
{
struct task_struct *tsk = current;
siginfo_t __info;
int ret;
spin_lock_irq(&tsk->sighand->siglock);
ret = dequeue_signal(tsk, &tsk->blocked, info ?: &__info);
spin_unlock_irq(&tsk->sighand->siglock);
return ret;
}
static inline void kernel_signal_stop(void)
{
spin_lock_irq(&current->sighand->siglock);
if (current->jobctl & JOBCTL_STOP_DEQUEUED)
__set_current_state(TASK_STOPPED);
spin_unlock_irq(&current->sighand->siglock);
schedule();
}
extern int send_sig_info(int, struct siginfo *, struct task_struct *);
extern int force_sigsegv(int, struct task_struct *);
extern int force_sig_info(int, struct siginfo *, struct task_struct *);
extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid);
extern int kill_pid_info_as_cred(int, struct siginfo *, struct pid *,
const struct cred *, u32);
extern int kill_pgrp(struct pid *pid, int sig, int priv);
extern int kill_pid(struct pid *pid, int sig, int priv);
extern int kill_proc_info(int, struct siginfo *, pid_t);
extern __must_check bool do_notify_parent(struct task_struct *, int);
extern void __wake_up_parent(struct task_struct *p, struct task_struct *parent);
extern void force_sig(int, struct task_struct *);
extern int send_sig(int, struct task_struct *, int);
extern int zap_other_threads(struct task_struct *p);
extern struct sigqueue *sigqueue_alloc(void);
extern void sigqueue_free(struct sigqueue *);
extern int send_sigqueue(struct sigqueue *, struct task_struct *, int group);
extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
static inline int restart_syscall(void)
{
set_tsk_thread_flag(current, TIF_SIGPENDING);
return -ERESTARTNOINTR;
}
static inline int signal_pending(struct task_struct *p)
{
return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));
}
static inline int __fatal_signal_pending(struct task_struct *p)
{
return unlikely(sigismember(&p->pending.signal, SIGKILL));
}
static inline int fatal_signal_pending(struct task_struct *p)
{
return signal_pending(p) && __fatal_signal_pending(p);
}
static inline int signal_pending_state(long state, struct task_struct *p)
{
if (!(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL)))
return 0;
if (!signal_pending(p))
return 0;
return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p);
}
/*
* Reevaluate whether the task has signals pending delivery.
* Wake the task if so.
* This is required every time the blocked sigset_t changes.
* callers must hold sighand->siglock.
*/
extern void recalc_sigpending_and_wake(struct task_struct *t);
extern void recalc_sigpending(void);
extern void signal_wake_up_state(struct task_struct *t, unsigned int state);
static inline void signal_wake_up(struct task_struct *t, bool resume)
{
signal_wake_up_state(t, resume ? TASK_WAKEKILL : 0);
}
static inline void ptrace_signal_wake_up(struct task_struct *t, bool resume)
{
signal_wake_up_state(t, resume ? __TASK_TRACED : 0);
}
#ifdef TIF_RESTORE_SIGMASK
/*
* Legacy restore_sigmask accessors. These are inefficient on
* SMP architectures because they require atomic operations.
*/
/**
* set_restore_sigmask() - make sure saved_sigmask processing gets done
*
* This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code
* will run before returning to user mode, to process the flag. For
* all callers, TIF_SIGPENDING is already set or it's no harm to set
* it. TIF_RESTORE_SIGMASK need not be in the set of bits that the
* arch code will notice on return to user mode, in case those bits
* are scarce. We set TIF_SIGPENDING here to ensure that the arch
* signal code always gets run when TIF_RESTORE_SIGMASK is set.
*/
static inline void set_restore_sigmask(void)
{
set_thread_flag(TIF_RESTORE_SIGMASK);
WARN_ON(!test_thread_flag(TIF_SIGPENDING));
}
static inline void clear_restore_sigmask(void)
{
clear_thread_flag(TIF_RESTORE_SIGMASK);
}
static inline bool test_restore_sigmask(void)
{
return test_thread_flag(TIF_RESTORE_SIGMASK);
}
static inline bool test_and_clear_restore_sigmask(void)
{
return test_and_clear_thread_flag(TIF_RESTORE_SIGMASK);
}
#else /* TIF_RESTORE_SIGMASK */
/* Higher-quality implementation, used if TIF_RESTORE_SIGMASK doesn't exist. */
static inline void set_restore_sigmask(void)
{
current->restore_sigmask = true;
WARN_ON(!test_thread_flag(TIF_SIGPENDING));
}
static inline void clear_restore_sigmask(void)
{
current->restore_sigmask = false;
}
static inline bool test_restore_sigmask(void)
{
return current->restore_sigmask;
}
static inline bool test_and_clear_restore_sigmask(void)
{
if (!current->restore_sigmask)
return false;
current->restore_sigmask = false;
return true;
}
#endif
static inline void restore_saved_sigmask(void)
{
if (test_and_clear_restore_sigmask())
__set_current_blocked(&current->saved_sigmask);
}
static inline sigset_t *sigmask_to_save(void)
{
sigset_t *res = &current->blocked;
if (unlikely(test_restore_sigmask()))
res = &current->saved_sigmask;
return res;
}
static inline int kill_cad_pid(int sig, int priv)
{
return kill_pid(cad_pid, sig, priv);
}
/* These can be the second arg to send_sig_info/send_group_sig_info. */
#define SEND_SIG_NOINFO ((struct siginfo *) 0)
#define SEND_SIG_PRIV ((struct siginfo *) 1)
#define SEND_SIG_FORCED ((struct siginfo *) 2)
/*
* True if we are on the alternate signal stack.
*/
static inline int on_sig_stack(unsigned long sp)
{
/*
* If the signal stack is SS_AUTODISARM then, by construction, we
* can't be on the signal stack unless user code deliberately set
* SS_AUTODISARM when we were already on it.
*
* This improves reliability: if user state gets corrupted such that
* the stack pointer points very close to the end of the signal stack,
* then this check will enable the signal to be handled anyway.
*/
if (current->sas_ss_flags & SS_AUTODISARM)
return 0;
#ifdef CONFIG_STACK_GROWSUP
return sp >= current->sas_ss_sp &&
sp - current->sas_ss_sp < current->sas_ss_size;
#else
return sp > current->sas_ss_sp &&
sp - current->sas_ss_sp <= current->sas_ss_size;
#endif
}
static inline int sas_ss_flags(unsigned long sp)
{
if (!current->sas_ss_size)
return SS_DISABLE;
return on_sig_stack(sp) ? SS_ONSTACK : 0;
}
static inline void sas_ss_reset(struct task_struct *p)
{
p->sas_ss_sp = 0;
p->sas_ss_size = 0;
p->sas_ss_flags = SS_DISABLE;
}
static inline unsigned long sigsp(unsigned long sp, struct ksignal *ksig)
{
if (unlikely((ksig->ka.sa.sa_flags & SA_ONSTACK)) && ! sas_ss_flags(sp))
#ifdef CONFIG_STACK_GROWSUP
return current->sas_ss_sp;
#else
return current->sas_ss_sp + current->sas_ss_size;
#endif
return sp;
}
extern void __cleanup_sighand(struct sighand_struct *);
extern void flush_itimer_signals(void);
#define tasklist_empty() \
list_empty(&init_task.tasks)
#define next_task(p) \
list_entry_rcu((p)->tasks.next, struct task_struct, tasks)
#define for_each_process(p) \
for (p = &init_task ; (p = next_task(p)) != &init_task ; )
extern bool current_is_single_threaded(void);
/*
* Careful: do_each_thread/while_each_thread is a double loop so
* 'break' will not work as expected - use goto instead.
*/
#define do_each_thread(g, t) \
for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do
#define while_each_thread(g, t) \
while ((t = next_thread(t)) != g)
#define __for_each_thread(signal, t) \
list_for_each_entry_rcu(t, &(signal)->thread_head, thread_node)
#define for_each_thread(p, t) \
__for_each_thread((p)->signal, t)
/* Careful: this is a double loop, 'break' won't work as expected. */
#define for_each_process_thread(p, t) \
for_each_process(p) for_each_thread(p, t)
typedef int (*proc_visitor)(struct task_struct *p, void *data);
void walk_process_tree(struct task_struct *top, proc_visitor, void *);
static inline int get_nr_threads(struct task_struct *tsk)
{
return tsk->signal->nr_threads;
}
static inline bool thread_group_leader(struct task_struct *p)
{
return p->exit_signal >= 0;
}
/* Do to the insanities of de_thread it is possible for a process
* to have the pid of the thread group leader without actually being
* the thread group leader. For iteration through the pids in proc
* all we care about is that we have a task with the appropriate
* pid, we don't actually care if we have the right task.
*/
static inline bool has_group_leader_pid(struct task_struct *p)
{
return task_pid(p) == p->signal->leader_pid;
}
static inline
bool same_thread_group(struct task_struct *p1, struct task_struct *p2)
{
return p1->signal == p2->signal;
}
static inline struct task_struct *next_thread(const struct task_struct *p)
{
return list_entry_rcu(p->thread_group.next,
struct task_struct, thread_group);
}
static inline int thread_group_empty(struct task_struct *p)
{
return list_empty(&p->thread_group);
}
#define delay_group_leader(p) \
(thread_group_leader(p) && !thread_group_empty(p))
extern struct sighand_struct *__lock_task_sighand(struct task_struct *tsk,
unsigned long *flags);
static inline struct sighand_struct *lock_task_sighand(struct task_struct *tsk,
unsigned long *flags)
{
struct sighand_struct *ret;
ret = __lock_task_sighand(tsk, flags);
(void)__cond_lock(&tsk->sighand->siglock, ret);
return ret;
}
static inline void unlock_task_sighand(struct task_struct *tsk,
unsigned long *flags)
{
spin_unlock_irqrestore(&tsk->sighand->siglock, *flags);
}
static inline unsigned long task_rlimit(const struct task_struct *tsk,
unsigned int limit)
{
return READ_ONCE(tsk->signal->rlim[limit].rlim_cur);
}
static inline unsigned long task_rlimit_max(const struct task_struct *tsk,
unsigned int limit)
{
return READ_ONCE(tsk->signal->rlim[limit].rlim_max);
}
static inline unsigned long rlimit(unsigned int limit)
{
return task_rlimit(current, limit);
}
static inline unsigned long rlimit_max(unsigned int limit)
{
return task_rlimit_max(current, limit);
}
#endif /* _LINUX_SCHED_SIGNAL_H */

40
include/linux/sched/stat.h Normal file
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@@ -0,0 +1,40 @@
#ifndef _LINUX_SCHED_STAT_H
#define _LINUX_SCHED_STAT_H
#include <linux/percpu.h>
/*
* Various counters maintained by the scheduler and fork(),
* exposed via /proc, sys.c or used by drivers via these APIs.
*
* ( Note that all these values are aquired without locking,
* so they can only be relied on in narrow circumstances. )
*/
extern unsigned long total_forks;
extern int nr_threads;
DECLARE_PER_CPU(unsigned long, process_counts);
extern int nr_processes(void);
extern unsigned long nr_running(void);
extern bool single_task_running(void);
extern unsigned long nr_iowait(void);
extern unsigned long nr_iowait_cpu(int cpu);
extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load);
static inline int sched_info_on(void)
{
#ifdef CONFIG_SCHEDSTATS
return 1;
#elif defined(CONFIG_TASK_DELAY_ACCT)
extern int delayacct_on;
return delayacct_on;
#else
return 0;
#endif
}
#ifdef CONFIG_SCHEDSTATS
void force_schedstat_enabled(void);
#endif
#endif /* _LINUX_SCHED_STAT_H */

10
include/linux/sched/sysctl.h
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@@ -1,5 +1,9 @@
#ifndef _SCHED_SYSCTL_H
#define _SCHED_SYSCTL_H
#ifndef _LINUX_SCHED_SYSCTL_H
#define _LINUX_SCHED_SYSCTL_H
#include <linux/types.h>
struct ctl_table;
#ifdef CONFIG_DETECT_HUNG_TASK
extern int sysctl_hung_task_check_count;
@@ -78,4 +82,4 @@ extern int sysctl_schedstats(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp,
loff_t *ppos);
#endif /* _SCHED_SYSCTL_H */
#endif /* _LINUX_SCHED_SYSCTL_H */

139
include/linux/sched/task.h Normal file
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@@ -0,0 +1,139 @@
#ifndef _LINUX_SCHED_TASK_H
#define _LINUX_SCHED_TASK_H
/*
* Interface between the scheduler and various task lifetime (fork()/exit())
* functionality:
*/
#include <linux/sched.h>
struct task_struct;
union thread_union;
/*
* This serializes "schedule()" and also protects
* the run-queue from deletions/modifications (but
* _adding_ to the beginning of the run-queue has
* a separate lock).
*/
extern rwlock_t tasklist_lock;
extern spinlock_t mmlist_lock;
extern union thread_union init_thread_union;
extern struct task_struct init_task;
#ifdef CONFIG_PROVE_RCU
extern int lockdep_tasklist_lock_is_held(void);
#endif /* #ifdef CONFIG_PROVE_RCU */
extern asmlinkage void schedule_tail(struct task_struct *prev);
extern void init_idle(struct task_struct *idle, int cpu);
extern void init_idle_bootup_task(struct task_struct *idle);
extern int sched_fork(unsigned long clone_flags, struct task_struct *p);
extern void sched_dead(struct task_struct *p);
void __noreturn do_task_dead(void);
extern void proc_caches_init(void);
extern void release_task(struct task_struct * p);
#ifdef CONFIG_HAVE_COPY_THREAD_TLS
extern int copy_thread_tls(unsigned long, unsigned long, unsigned long,
struct task_struct *, unsigned long);
#else
extern int copy_thread(unsigned long, unsigned long, unsigned long,
struct task_struct *);
/* Architectures that haven't opted into copy_thread_tls get the tls argument
* via pt_regs, so ignore the tls argument passed via C. */
static inline int copy_thread_tls(
unsigned long clone_flags, unsigned long sp, unsigned long arg,
struct task_struct *p, unsigned long tls)
{
return copy_thread(clone_flags, sp, arg, p);
}
#endif
extern void flush_thread(void);
#ifdef CONFIG_HAVE_EXIT_THREAD
extern void exit_thread(struct task_struct *tsk);
#else
static inline void exit_thread(struct task_struct *tsk)
{
}
#endif
extern void do_group_exit(int);
extern void exit_files(struct task_struct *);
extern void exit_itimers(struct signal_struct *);
extern long _do_fork(unsigned long, unsigned long, unsigned long, int __user *, int __user *, unsigned long);
extern long do_fork(unsigned long, unsigned long, unsigned long, int __user *, int __user *);
struct task_struct *fork_idle(int);
extern pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
extern void free_task(struct task_struct *tsk);
/* sched_exec is called by processes performing an exec */
#ifdef CONFIG_SMP
extern void sched_exec(void);
#else
#define sched_exec() {}
#endif
#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
extern void __put_task_struct(struct task_struct *t);
static inline void put_task_struct(struct task_struct *t)
{
if (atomic_dec_and_test(&t->usage))
__put_task_struct(t);
}
struct task_struct *task_rcu_dereference(struct task_struct **ptask);
struct task_struct *try_get_task_struct(struct task_struct **ptask);
#ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT
extern int arch_task_struct_size __read_mostly;
#else
# define arch_task_struct_size (sizeof(struct task_struct))
#endif
#ifdef CONFIG_VMAP_STACK
static inline struct vm_struct *task_stack_vm_area(const struct task_struct *t)
{
return t->stack_vm_area;
}
#else
static inline struct vm_struct *task_stack_vm_area(const struct task_struct *t)
{
return NULL;
}
#endif
/*
* Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring
* subscriptions and synchronises with wait4(). Also used in procfs. Also
* pins the final release of task.io_context. Also protects ->cpuset and
* ->cgroup.subsys[]. And ->vfork_done.
*
* Nests both inside and outside of read_lock(&tasklist_lock).
* It must not be nested with write_lock_irq(&tasklist_lock),
* neither inside nor outside.
*/
static inline void task_lock(struct task_struct *p)
{
spin_lock(&p->alloc_lock);
}
static inline void task_unlock(struct task_struct *p)
{
spin_unlock(&p->alloc_lock);
}
#endif /* _LINUX_SCHED_TASK_H */

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include/linux/sched/task_stack.h Normal file
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@@ -0,0 +1,121 @@
#ifndef _LINUX_SCHED_TASK_STACK_H
#define _LINUX_SCHED_TASK_STACK_H
/*
* task->stack (kernel stack) handling interfaces:
*/
#include <linux/sched.h>
#include <linux/magic.h>
#ifdef CONFIG_THREAD_INFO_IN_TASK
/*
* When accessing the stack of a non-current task that might exit, use
* try_get_task_stack() instead. task_stack_page will return a pointer
* that could get freed out from under you.
*/
static inline void *task_stack_page(const struct task_struct *task)
{
return task->stack;
}
#define setup_thread_stack(new,old) do { } while(0)
static inline unsigned long *end_of_stack(const struct task_struct *task)
{
return task->stack;
}
#elif !defined(__HAVE_THREAD_FUNCTIONS)
#define task_stack_page(task) ((void *)(task)->stack)
static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)
{
*task_thread_info(p) = *task_thread_info(org);
task_thread_info(p)->task = p;
}
/*
* Return the address of the last usable long on the stack.
*
* When the stack grows down, this is just above the thread
* info struct. Going any lower will corrupt the threadinfo.
*
* When the stack grows up, this is the highest address.
* Beyond that position, we corrupt data on the next page.
*/
static inline unsigned long *end_of_stack(struct task_struct *p)
{
#ifdef CONFIG_STACK_GROWSUP
return (unsigned long *)((unsigned long)task_thread_info(p) + THREAD_SIZE) - 1;
#else
return (unsigned long *)(task_thread_info(p) + 1);
#endif
}
#endif
#ifdef CONFIG_THREAD_INFO_IN_TASK
static inline void *try_get_task_stack(struct task_struct *tsk)
{
return atomic_inc_not_zero(&tsk->stack_refcount) ?
task_stack_page(tsk) : NULL;
}
extern void put_task_stack(struct task_struct *tsk);
#else
static inline void *try_get_task_stack(struct task_struct *tsk)
{
return task_stack_page(tsk);
}
static inline void put_task_stack(struct task_struct *tsk) {}
#endif
#define task_stack_end_corrupted(task) \
(*(end_of_stack(task)) != STACK_END_MAGIC)
static inline int object_is_on_stack(void *obj)
{
void *stack = task_stack_page(current);
return (obj >= stack) && (obj < (stack + THREAD_SIZE));
}
extern void thread_stack_cache_init(void);
#ifdef CONFIG_DEBUG_STACK_USAGE
static inline unsigned long stack_not_used(struct task_struct *p)
{
unsigned long *n = end_of_stack(p);
do { /* Skip over canary */
# ifdef CONFIG_STACK_GROWSUP
n--;
# else
n++;
# endif
} while (!*n);
# ifdef CONFIG_STACK_GROWSUP
return (unsigned long)end_of_stack(p) - (unsigned long)n;
# else
return (unsigned long)n - (unsigned long)end_of_stack(p);
# endif
}
#endif
extern void set_task_stack_end_magic(struct task_struct *tsk);
#ifndef __HAVE_ARCH_KSTACK_END
static inline int kstack_end(void *addr)
{
/* Reliable end of stack detection:
* Some APM bios versions misalign the stack
*/
return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*)));
}
#endif
#endif /* _LINUX_SCHED_TASK_STACK_H */

226
include/linux/sched/topology.h Normal file
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@@ -0,0 +1,226 @@
#ifndef _LINUX_SCHED_TOPOLOGY_H
#define _LINUX_SCHED_TOPOLOGY_H
#include <linux/topology.h>
#include <linux/sched/idle.h>
/*
* sched-domains (multiprocessor balancing) declarations:
*/
#ifdef CONFIG_SMP
#define SD_LOAD_BALANCE 0x0001 /* Do load balancing on this domain. */
#define SD_BALANCE_NEWIDLE 0x0002 /* Balance when about to become idle */
#define SD_BALANCE_EXEC 0x0004 /* Balance on exec */
#define SD_BALANCE_FORK 0x0008 /* Balance on fork, clone */
#define SD_BALANCE_WAKE 0x0010 /* Balance on wakeup */
#define SD_WAKE_AFFINE 0x0020 /* Wake task to waking CPU */
#define SD_ASYM_CPUCAPACITY 0x0040 /* Groups have different max cpu capacities */
#define SD_SHARE_CPUCAPACITY 0x0080 /* Domain members share cpu capacity */
#define SD_SHARE_POWERDOMAIN 0x0100 /* Domain members share power domain */
#define SD_SHARE_PKG_RESOURCES 0x0200 /* Domain members share cpu pkg resources */
#define SD_SERIALIZE 0x0400 /* Only a single load balancing instance */
#define SD_ASYM_PACKING 0x0800 /* Place busy groups earlier in the domain */
#define SD_PREFER_SIBLING 0x1000 /* Prefer to place tasks in a sibling domain */
#define SD_OVERLAP 0x2000 /* sched_domains of this level overlap */
#define SD_NUMA 0x4000 /* cross-node balancing */
/*
* Increase resolution of cpu_capacity calculations
*/
#define SCHED_CAPACITY_SHIFT SCHED_FIXEDPOINT_SHIFT
#define SCHED_CAPACITY_SCALE (1L << SCHED_CAPACITY_SHIFT)
#ifdef CONFIG_SCHED_SMT
static inline int cpu_smt_flags(void)
{
return SD_SHARE_CPUCAPACITY | SD_SHARE_PKG_RESOURCES;
}
#endif
#ifdef CONFIG_SCHED_MC
static inline int cpu_core_flags(void)
{
return SD_SHARE_PKG_RESOURCES;
}
#endif
#ifdef CONFIG_NUMA
static inline int cpu_numa_flags(void)
{
return SD_NUMA;
}
#endif
extern int arch_asym_cpu_priority(int cpu);
struct sched_domain_attr {
int relax_domain_level;
};
#define SD_ATTR_INIT (struct sched_domain_attr) { \
.relax_domain_level = -1, \
}
extern int sched_domain_level_max;
struct sched_group;
struct sched_domain_shared {
atomic_t ref;
atomic_t nr_busy_cpus;
int has_idle_cores;
};
struct sched_domain {
/* These fields must be setup */
struct sched_domain *parent; /* top domain must be null terminated */
struct sched_domain *child; /* bottom domain must be null terminated */
struct sched_group *groups; /* the balancing groups of the domain */
unsigned long min_interval; /* Minimum balance interval ms */
unsigned long max_interval; /* Maximum balance interval ms */
unsigned int busy_factor; /* less balancing by factor if busy */
unsigned int imbalance_pct; /* No balance until over watermark */
unsigned int cache_nice_tries; /* Leave cache hot tasks for # tries */
unsigned int busy_idx;
unsigned int idle_idx;
unsigned int newidle_idx;
unsigned int wake_idx;
unsigned int forkexec_idx;
unsigned int smt_gain;
int nohz_idle; /* NOHZ IDLE status */
int flags; /* See SD_* */
int level;
/* Runtime fields. */
unsigned long last_balance; /* init to jiffies. units in jiffies */
unsigned int balance_interval; /* initialise to 1. units in ms. */
unsigned int nr_balance_failed; /* initialise to 0 */
/* idle_balance() stats */
u64 max_newidle_lb_cost;
unsigned long next_decay_max_lb_cost;
u64 avg_scan_cost; /* select_idle_sibling */
#ifdef CONFIG_SCHEDSTATS
/* load_balance() stats */
unsigned int lb_count[CPU_MAX_IDLE_TYPES];
unsigned int lb_failed[CPU_MAX_IDLE_TYPES];
unsigned int lb_balanced[CPU_MAX_IDLE_TYPES];
unsigned int lb_imbalance[CPU_MAX_IDLE_TYPES];
unsigned int lb_gained[CPU_MAX_IDLE_TYPES];
unsigned int lb_hot_gained[CPU_MAX_IDLE_TYPES];
unsigned int lb_nobusyg[CPU_MAX_IDLE_TYPES];
unsigned int lb_nobusyq[CPU_MAX_IDLE_TYPES];
/* Active load balancing */
unsigned int alb_count;
unsigned int alb_failed;
unsigned int alb_pushed;
/* SD_BALANCE_EXEC stats */
unsigned int sbe_count;
unsigned int sbe_balanced;
unsigned int sbe_pushed;
/* SD_BALANCE_FORK stats */
unsigned int sbf_count;
unsigned int sbf_balanced;
unsigned int sbf_pushed;
/* try_to_wake_up() stats */
unsigned int ttwu_wake_remote;
unsigned int ttwu_move_affine;
unsigned int ttwu_move_balance;
#endif
#ifdef CONFIG_SCHED_DEBUG
char *name;
#endif
union {
void *private; /* used during construction */
struct rcu_head rcu; /* used during destruction */
};
struct sched_domain_shared *shared;
unsigned int span_weight;
/*
* Span of all CPUs in this domain.
*
* NOTE: this field is variable length. (Allocated dynamically
* by attaching extra space to the end of the structure,
* depending on how many CPUs the kernel has booted up with)
*/
unsigned long span[0];
};
static inline struct cpumask *sched_domain_span(struct sched_domain *sd)
{
return to_cpumask(sd->span);
}
extern void partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
struct sched_domain_attr *dattr_new);
/* Allocate an array of sched domains, for partition_sched_domains(). */
cpumask_var_t *alloc_sched_domains(unsigned int ndoms);
void free_sched_domains(cpumask_var_t doms[], unsigned int ndoms);
bool cpus_share_cache(int this_cpu, int that_cpu);
typedef const struct cpumask *(*sched_domain_mask_f)(int cpu);
typedef int (*sched_domain_flags_f)(void);
#define SDTL_OVERLAP 0x01
struct sd_data {
struct sched_domain **__percpu sd;
struct sched_domain_shared **__percpu sds;
struct sched_group **__percpu sg;
struct sched_group_capacity **__percpu sgc;
};
struct sched_domain_topology_level {
sched_domain_mask_f mask;
sched_domain_flags_f sd_flags;
int flags;
int numa_level;
struct sd_data data;
#ifdef CONFIG_SCHED_DEBUG
char *name;
#endif
};
extern void set_sched_topology(struct sched_domain_topology_level *tl);
#ifdef CONFIG_SCHED_DEBUG
# define SD_INIT_NAME(type) .name = #type
#else
# define SD_INIT_NAME(type)
#endif
#else /* CONFIG_SMP */
struct sched_domain_attr;
static inline void
partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
struct sched_domain_attr *dattr_new)
{
}
static inline bool cpus_share_cache(int this_cpu, int that_cpu)
{
return true;
}
#endif /* !CONFIG_SMP */
static inline int task_node(const struct task_struct *p)
{
return cpu_to_node(task_cpu(p));
}
#endif /* _LINUX_SCHED_TOPOLOGY_H */

61
include/linux/sched/user.h Normal file
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@@ -0,0 +1,61 @@
#ifndef _LINUX_SCHED_USER_H
#define _LINUX_SCHED_USER_H
#include <linux/uidgid.h>
#include <linux/atomic.h>
struct key;
/*
* Some day this will be a full-fledged user tracking system..
*/
struct user_struct {
atomic_t __count; /* reference count */
atomic_t processes; /* How many processes does this user have? */
atomic_t sigpending; /* How many pending signals does this user have? */
#ifdef CONFIG_FANOTIFY
atomic_t fanotify_listeners;
#endif
#ifdef CONFIG_EPOLL
atomic_long_t epoll_watches; /* The number of file descriptors currently watched */
#endif
#ifdef CONFIG_POSIX_MQUEUE
/* protected by mq_lock */
unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
#endif
unsigned long locked_shm; /* How many pages of mlocked shm ? */
unsigned long unix_inflight; /* How many files in flight in unix sockets */
atomic_long_t pipe_bufs; /* how many pages are allocated in pipe buffers */
#ifdef CONFIG_KEYS
struct key *uid_keyring; /* UID specific keyring */
struct key *session_keyring; /* UID's default session keyring */
#endif
/* Hash table maintenance information */
struct hlist_node uidhash_node;
kuid_t uid;
#if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL)
atomic_long_t locked_vm;
#endif
};
extern int uids_sysfs_init(void);
extern struct user_struct *find_user(kuid_t);
extern struct user_struct root_user;
#define INIT_USER (&root_user)
/* per-UID process charging. */
extern struct user_struct * alloc_uid(kuid_t);
static inline struct user_struct *get_uid(struct user_struct *u)
{
atomic_inc(&u->__count);
return u;
}
extern void free_uid(struct user_struct *);
#endif /* _LINUX_SCHED_USER_H */

53
include/linux/sched/wake_q.h Normal file
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@@ -0,0 +1,53 @@
#ifndef _LINUX_SCHED_WAKE_Q_H
#define _LINUX_SCHED_WAKE_Q_H
/*
* Wake-queues are lists of tasks with a pending wakeup, whose
* callers have already marked the task as woken internally,
* and can thus carry on. A common use case is being able to
* do the wakeups once the corresponding user lock as been
* released.
*
* We hold reference to each task in the list across the wakeup,
* thus guaranteeing that the memory is still valid by the time
* the actual wakeups are performed in wake_up_q().
*
* One per task suffices, because there's never a need for a task to be
* in two wake queues simultaneously; it is forbidden to abandon a task
* in a wake queue (a call to wake_up_q() _must_ follow), so if a task is
* already in a wake queue, the wakeup will happen soon and the second
* waker can just skip it.
*
* The DEFINE_WAKE_Q macro declares and initializes the list head.
* wake_up_q() does NOT reinitialize the list; it's expected to be
* called near the end of a function. Otherwise, the list can be
* re-initialized for later re-use by wake_q_init().
*
* Note that this can cause spurious wakeups. schedule() callers
* must ensure the call is done inside a loop, confirming that the
* wakeup condition has in fact occurred.
*/
#include <linux/sched.h>
struct wake_q_head {
struct wake_q_node *first;
struct wake_q_node **lastp;
};
#define WAKE_Q_TAIL ((struct wake_q_node *) 0x01)
#define DEFINE_WAKE_Q(name) \
struct wake_q_head name = { WAKE_Q_TAIL, &name.first }
static inline void wake_q_init(struct wake_q_head *head)
{
head->first = WAKE_Q_TAIL;
head->lastp = &head->first;
}
extern void wake_q_add(struct wake_q_head *head,
struct task_struct *task);
extern void wake_up_q(struct wake_q_head *head);
#endif /* _LINUX_SCHED_WAKE_Q_H */

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include/linux/sched/xacct.h Normal file
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@@ -0,0 +1,48 @@
#ifndef _LINUX_SCHED_XACCT_H
#define _LINUX_SCHED_XACCT_H
/*
* Extended task accounting methods:
*/
#include <linux/sched.h>
#ifdef CONFIG_TASK_XACCT
static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
{
tsk->ioac.rchar += amt;
}
static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
{
tsk->ioac.wchar += amt;
}
static inline void inc_syscr(struct task_struct *tsk)
{
tsk->ioac.syscr++;
}
static inline void inc_syscw(struct task_struct *tsk)
{
tsk->ioac.syscw++;
}
#else
static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
{
}
static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
{
}
static inline void inc_syscr(struct task_struct *tsk)
{
}
static inline void inc_syscw(struct task_struct *tsk)
{
}
#endif
#endif /* _LINUX_SCHED_XACCT_H */

57
include/linux/signal.h
View File

@@ -1,32 +1,13 @@
#ifndef _LINUX_SIGNAL_H
#define _LINUX_SIGNAL_H
#include <linux/list.h>
#include <linux/bug.h>
#include <uapi/linux/signal.h>
#include <linux/signal_types.h>
struct task_struct;
/* for sysctl */
extern int print_fatal_signals;
/*
* Real Time signals may be queued.
*/
struct sigqueue {
struct list_head list;
int flags;
siginfo_t info;
struct user_struct *user;
};
/* flags values. */
#define SIGQUEUE_PREALLOC 1
struct sigpending {
struct list_head list;
sigset_t signal;
};
#ifndef HAVE_ARCH_COPY_SIGINFO
@@ -272,42 +253,6 @@ extern void set_current_blocked(sigset_t *);
extern void __set_current_blocked(const sigset_t *);
extern int show_unhandled_signals;
struct sigaction {
#ifndef __ARCH_HAS_IRIX_SIGACTION
__sighandler_t sa_handler;
unsigned long sa_flags;
#else
unsigned int sa_flags;
__sighandler_t sa_handler;
#endif
#ifdef __ARCH_HAS_SA_RESTORER
__sigrestore_t sa_restorer;
#endif
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
#ifdef __ARCH_HAS_KA_RESTORER
__sigrestore_t ka_restorer;
#endif
};
#ifdef CONFIG_OLD_SIGACTION
struct old_sigaction {
__sighandler_t sa_handler;
old_sigset_t sa_mask;
unsigned long sa_flags;
__sigrestore_t sa_restorer;
};
#endif
struct ksignal {
struct k_sigaction ka;
siginfo_t info;
int sig;
};
extern int get_signal(struct ksignal *ksig);
extern void signal_setup_done(int failed, struct ksignal *ksig, int stepping);
extern void exit_signals(struct task_struct *tsk);

66
include/linux/signal_types.h Normal file
View File

@@ -0,0 +1,66 @@
#ifndef _LINUX_SIGNAL_TYPES_H
#define _LINUX_SIGNAL_TYPES_H
/*
* Basic signal handling related data type definitions:
*/
#include <linux/list.h>
#include <uapi/linux/signal.h>
/*
* Real Time signals may be queued.
*/
struct sigqueue {
struct list_head list;
int flags;
siginfo_t info;
struct user_struct *user;
};
/* flags values. */
#define SIGQUEUE_PREALLOC 1
struct sigpending {
struct list_head list;
sigset_t signal;
};
struct sigaction {
#ifndef __ARCH_HAS_IRIX_SIGACTION
__sighandler_t sa_handler;
unsigned long sa_flags;
#else
unsigned int sa_flags;
__sighandler_t sa_handler;
#endif
#ifdef __ARCH_HAS_SA_RESTORER
__sigrestore_t sa_restorer;
#endif
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
#ifdef __ARCH_HAS_KA_RESTORER
__sigrestore_t ka_restorer;
#endif
};
#ifdef CONFIG_OLD_SIGACTION
struct old_sigaction {
__sighandler_t sa_handler;
old_sigset_t sa_mask;
unsigned long sa_flags;
__sigrestore_t sa_restorer;
};
#endif
struct ksignal {
struct k_sigaction ka;
siginfo_t info;
int sig;
};
#endif /* _LINUX_SIGNAL_TYPES_H */

2
include/linux/signalfd.h
View File

@@ -8,7 +8,7 @@
#define _LINUX_SIGNALFD_H
#include <uapi/linux/signalfd.h>
#include <linux/sched/signal.h>
#ifdef CONFIG_SIGNALFD

1
include/linux/skbuff.h
View File

@@ -34,6 +34,7 @@
#include <linux/dma-mapping.h>
#include <linux/netdev_features.h>
#include <linux/sched.h>
#include <linux/sched/clock.h>
#include <net/flow_dissector.h>
#include <linux/splice.h>
#include <linux/in6.h>

1
include/linux/sunrpc/types.h
View File

@@ -10,6 +10,7 @@
#define _LINUX_SUNRPC_TYPES_H_
#include <linux/timer.h>
#include <linux/sched/signal.h>
#include <linux/workqueue.h>
#include <linux/sunrpc/debug.h>
#include <linux/list.h>

2
include/linux/taskstats_kern.h
View File

@@ -8,7 +8,7 @@
#define _LINUX_TASKSTATS_KERN_H
#include <linux/taskstats.h>
#include <linux/sched.h>
#include <linux/sched/signal.h>
#include <linux/slab.h>
#ifdef CONFIG_TASKSTATS

4
include/linux/timekeeping.h
View File

@@ -8,6 +8,10 @@
void timekeeping_init(void);
extern int timekeeping_suspended;
/* Architecture timer tick functions: */
extern void update_process_times(int user);
extern void xtime_update(unsigned long ticks);
/*
* Get and set timeofday
*/

2
include/linux/timer.h
View File

@@ -212,7 +212,7 @@ struct hrtimer;
extern enum hrtimer_restart it_real_fn(struct hrtimer *);
#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
#include <linux/sysctl.h>
struct ctl_table;
extern unsigned int sysctl_timer_migration;
int timer_migration_handler(struct ctl_table *table, int write,

3
include/linux/user_namespace.h
View File

@@ -5,6 +5,9 @@
#include <linux/nsproxy.h>
#include <linux/ns_common.h>
#include <linux/sched.h>
#include <linux/workqueue.h>
#include <linux/rwsem.h>
#include <linux/sysctl.h>
#include <linux/err.h>
#define UID_GID_MAP_MAX_EXTENTS 5

2
include/linux/vmacache.h
View File

@@ -12,7 +12,7 @@
static inline void vmacache_flush(struct task_struct *tsk)
{
memset(tsk->vmacache, 0, sizeof(tsk->vmacache));
memset(tsk->vmacache.vmas, 0, sizeof(tsk->vmacache.vmas));
}
extern void vmacache_flush_all(struct mm_struct *mm);

1
include/linux/wait.h
View File

@@ -6,6 +6,7 @@
#include <linux/list.h>
#include <linux/stddef.h>
#include <linux/spinlock.h>
#include <asm/current.h>
#include <uapi/linux/wait.h>