xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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

Browse Source 
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits)
  sched/tracing: Add a new tracepoint for sleeptime
  sched: Disable scheduler warnings during oopses
  sched: Fix cgroup movement of waking process
  sched: Fix cgroup movement of newly created process
  sched: Fix cgroup movement of forking process
  sched: Remove cfs bandwidth period check in tg_set_cfs_period()
  sched: Fix load-balance lock-breaking
  sched: Replace all_pinned with a generic flags field
  sched: Only queue remote wakeups when crossing cache boundaries
  sched: Add missing rcu_dereference() around ->real_parent usage
  [S390] fix cputime overflow in uptime_proc_show
  [S390] cputime: add sparse checking and cleanup
  sched: Mark parent and real_parent as __rcu
  sched, nohz: Fix missing RCU read lock
  sched, nohz: Set the NOHZ_BALANCE_KICK flag for idle load balancer
  sched, nohz: Fix the idle cpu check in nohz_idle_balance
  sched: Use jump_labels for sched_feat
  sched/accounting: Fix parameter passing in task_group_account_field
  sched/accounting: Fix user/system tick double accounting
  sched/accounting: Re-use scheduler statistics for the root cgroup
  ...

Fix up conflicts in
 - arch/ia64/include/asm/cputime.h, include/asm-generic/cputime.h
	usecs_to_cputime64() vs the sparse cleanups
 - kernel/sched/fair.c, kernel/time/tick-sched.c
	scheduler changes in multiple branches
This commit is contained in:
Linus Torvalds
2012-01-06 08:33:28 -08:00
parent 35b740e466 1ac9bc6943
commit 0db49b72bc
44 changed files with 3051 additions and 2792 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
kernel/Makefile
View File

@@ -2,16 +2,15 @@
# Makefile for the linux kernel.
#
obj-y = sched.o fork.o exec_domain.o panic.o printk.o \
obj-y = fork.o exec_domain.o panic.o printk.o \
cpu.o exit.o itimer.o time.o softirq.o resource.o \
sysctl.o sysctl_binary.o capability.o ptrace.o timer.o user.o \
signal.o sys.o kmod.o workqueue.o pid.o \
rcupdate.o extable.o params.o posix-timers.o \
kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \
hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \
notifier.o ksysfs.o sched_clock.o cred.o \
async.o range.o
obj-y += groups.o
notifier.o ksysfs.o cred.o \
async.o range.o groups.o
ifdef CONFIG_FUNCTION_TRACER
# Do not trace debug files and internal ftrace files
@@ -20,10 +19,11 @@ CFLAGS_REMOVE_lockdep_proc.o = -pg
CFLAGS_REMOVE_mutex-debug.o = -pg
CFLAGS_REMOVE_rtmutex-debug.o = -pg
CFLAGS_REMOVE_cgroup-debug.o = -pg
CFLAGS_REMOVE_sched_clock.o = -pg
CFLAGS_REMOVE_irq_work.o = -pg
endif
obj-y += sched/
obj-$(CONFIG_FREEZER) += freezer.o
obj-$(CONFIG_PROFILING) += profile.o
obj-$(CONFIG_SYSCTL_SYSCALL_CHECK) += sysctl_check.o
@@ -99,7 +99,6 @@ obj-$(CONFIG_TRACING) += trace/
obj-$(CONFIG_X86_DS) += trace/
obj-$(CONFIG_RING_BUFFER) += trace/
obj-$(CONFIG_TRACEPOINTS) += trace/
obj-$(CONFIG_SMP) += sched_cpupri.o
obj-$(CONFIG_IRQ_WORK) += irq_work.o
obj-$(CONFIG_CPU_PM) += cpu_pm.o
@@ -110,15 +109,6 @@ obj-$(CONFIG_PADATA) += padata.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y)
# According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is
# needed for x86 only. Why this used to be enabled for all architectures is beyond
# me. I suspect most platforms don't need this, but until we know that for sure
# I turn this off for IA-64 only. Andreas Schwab says it's also needed on m68k
# to get a correct value for the wait-channel (WCHAN in ps). --davidm
CFLAGS_sched.o := $(PROFILING) -fno-omit-frame-pointer
endif
$(obj)/configs.o: $(obj)/config_data.h
# config_data.h contains the same information as ikconfig.h but gzipped.

4
kernel/acct.c
View File

@@ -613,8 +613,8 @@ void acct_collect(long exitcode, int group_dead)
pacct->ac_flag |= ACORE;
if (current->flags & PF_SIGNALED)
pacct->ac_flag |= AXSIG;
pacct->ac_utime = cputime_add(pacct->ac_utime, current->utime);
pacct->ac_stime = cputime_add(pacct->ac_stime, current->stime);
pacct->ac_utime += current->utime;
pacct->ac_stime += current->stime;
pacct->ac_minflt += current->min_flt;
pacct->ac_majflt += current->maj_flt;
spin_unlock_irq(&current->sighand->siglock);

3
kernel/cpu.c
View File

@@ -178,8 +178,7 @@ static inline void check_for_tasks(int cpu)
write_lock_irq(&tasklist_lock);
for_each_process(p) {
if (task_cpu(p) == cpu && p->state == TASK_RUNNING &&
(!cputime_eq(p->utime, cputime_zero) ||
!cputime_eq(p->stime, cputime_zero)))
(p->utime || p->stime))
printk(KERN_WARNING "Task %s (pid = %d) is on cpu %d "
"(state = %ld, flags = %x)\n",
p->comm, task_pid_nr(p), cpu,

22
kernel/exit.c
View File

@@ -121,9 +121,9 @@ static void __exit_signal(struct task_struct *tsk)
* We won't ever get here for the group leader, since it
* will have been the last reference on the signal_struct.
*/
sig->utime = cputime_add(sig->utime, tsk->utime);
sig->stime = cputime_add(sig->stime, tsk->stime);
sig->gtime = cputime_add(sig->gtime, tsk->gtime);
sig->utime += tsk->utime;
sig->stime += tsk->stime;
sig->gtime += tsk->gtime;
sig->min_flt += tsk->min_flt;
sig->maj_flt += tsk->maj_flt;
sig->nvcsw += tsk->nvcsw;
@@ -1255,19 +1255,9 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
spin_lock_irq(&p->real_parent->sighand->siglock);
psig = p->real_parent->signal;
sig = p->signal;
psig->cutime =
cputime_add(psig->cutime,
cputime_add(tgutime,
sig->cutime));
psig->cstime =
cputime_add(psig->cstime,
cputime_add(tgstime,
sig->cstime));
psig->cgtime =
cputime_add(psig->cgtime,
cputime_add(p->gtime,
cputime_add(sig->gtime,
sig->cgtime)));
psig->cutime += tgutime + sig->cutime;
psig->cstime += tgstime + sig->cstime;
psig->cgtime += p->gtime + sig->gtime + sig->cgtime;
psig->cmin_flt +=
p->min_flt + sig->min_flt + sig->cmin_flt;
psig->cmaj_flt +=

14
kernel/fork.c
View File

@@ -1023,8 +1023,8 @@ void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
*/
static void posix_cpu_timers_init(struct task_struct *tsk)
{
tsk->cputime_expires.prof_exp = cputime_zero;
tsk->cputime_expires.virt_exp = cputime_zero;
tsk->cputime_expires.prof_exp = 0;
tsk->cputime_expires.virt_exp = 0;
tsk->cputime_expires.sched_exp = 0;
INIT_LIST_HEAD(&tsk->cpu_timers[0]);
INIT_LIST_HEAD(&tsk->cpu_timers[1]);
@@ -1132,14 +1132,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
init_sigpending(&p->pending);
p->utime = cputime_zero;
p->stime = cputime_zero;
p->gtime = cputime_zero;
p->utimescaled = cputime_zero;
p->stimescaled = cputime_zero;
p->utime = p->stime = p->gtime = 0;
p->utimescaled = p->stimescaled = 0;
#ifndef CONFIG_VIRT_CPU_ACCOUNTING
p->prev_utime = cputime_zero;
p->prev_stime = cputime_zero;
p->prev_utime = p->prev_stime = 0;
#endif
#if defined(SPLIT_RSS_COUNTING)
memset(&p->rss_stat, 0, sizeof(p->rss_stat));

15
kernel/itimer.c
View File

@@ -52,22 +52,22 @@ static void get_cpu_itimer(struct task_struct *tsk, unsigned int clock_id,
cval = it->expires;
cinterval = it->incr;
if (!cputime_eq(cval, cputime_zero)) {
if (cval) {
struct task_cputime cputime;
cputime_t t;
thread_group_cputimer(tsk, &cputime);
if (clock_id == CPUCLOCK_PROF)
t = cputime_add(cputime.utime, cputime.stime);
t = cputime.utime + cputime.stime;
else
/* CPUCLOCK_VIRT */
t = cputime.utime;
if (cputime_le(cval, t))
if (cval < t)
/* about to fire */
cval = cputime_one_jiffy;
else
cval = cputime_sub(cval, t);
cval = cval - t;
}
spin_unlock_irq(&tsk->sighand->siglock);
@@ -161,10 +161,9 @@ static void set_cpu_itimer(struct task_struct *tsk, unsigned int clock_id,
cval = it->expires;
cinterval = it->incr;
if (!cputime_eq(cval, cputime_zero) ||
!cputime_eq(nval, cputime_zero)) {
if (cputime_gt(nval, cputime_zero))
nval = cputime_add(nval, cputime_one_jiffy);
if (cval || nval) {
if (nval > 0)
nval += cputime_one_jiffy;
set_process_cpu_timer(tsk, clock_id, &nval, &cval);
}
it->expires = nval;

132
kernel/posix-cpu-timers.c
View File

@@ -78,7 +78,7 @@ static inline int cpu_time_before(const clockid_t which_clock,
if (CPUCLOCK_WHICH(which_clock) == CPUCLOCK_SCHED) {
return now.sched < then.sched;
} else {
return cputime_lt(now.cpu, then.cpu);
return now.cpu < then.cpu;
}
}
static inline void cpu_time_add(const clockid_t which_clock,
@@ -88,7 +88,7 @@ static inline void cpu_time_add(const clockid_t which_clock,
if (CPUCLOCK_WHICH(which_clock) == CPUCLOCK_SCHED) {
acc->sched += val.sched;
} else {
acc->cpu = cputime_add(acc->cpu, val.cpu);
acc->cpu += val.cpu;
}
}
static inline union cpu_time_count cpu_time_sub(const clockid_t which_clock,
@@ -98,24 +98,11 @@ static inline union cpu_time_count cpu_time_sub(const clockid_t which_clock,
if (CPUCLOCK_WHICH(which_clock) == CPUCLOCK_SCHED) {
a.sched -= b.sched;
} else {
a.cpu = cputime_sub(a.cpu, b.cpu);
a.cpu -= b.cpu;
}
return a;
}
/*
* Divide and limit the result to res >= 1
*
* This is necessary to prevent signal delivery starvation, when the result of
* the division would be rounded down to 0.
*/
static inline cputime_t cputime_div_non_zero(cputime_t time, unsigned long div)
{
cputime_t res = cputime_div(time, div);
return max_t(cputime_t, res, 1);
}
/*
* Update expiry time from increment, and increase overrun count,
* given the current clock sample.
@@ -148,28 +135,26 @@ static void bump_cpu_timer(struct k_itimer *timer,
} else {
cputime_t delta, incr;
if (cputime_lt(now.cpu, timer->it.cpu.expires.cpu))
if (now.cpu < timer->it.cpu.expires.cpu)
return;
incr = timer->it.cpu.incr.cpu;
delta = cputime_sub(cputime_add(now.cpu, incr),
timer->it.cpu.expires.cpu);
delta = now.cpu + incr - timer->it.cpu.expires.cpu;
/* Don't use (incr*2 < delta), incr*2 might overflow. */
for (i = 0; cputime_lt(incr, cputime_sub(delta, incr)); i++)
incr = cputime_add(incr, incr);
for (; i >= 0; incr = cputime_halve(incr), i--) {
if (cputime_lt(delta, incr))
for (i = 0; incr < delta - incr; i++)
incr += incr;
for (; i >= 0; incr = incr >> 1, i--) {
if (delta < incr)
continue;
timer->it.cpu.expires.cpu =
cputime_add(timer->it.cpu.expires.cpu, incr);
timer->it.cpu.expires.cpu += incr;
timer->it_overrun += 1 << i;
delta = cputime_sub(delta, incr);
delta -= incr;
}
}
}
static inline cputime_t prof_ticks(struct task_struct *p)
{
return cputime_add(p->utime, p->stime);
return p->utime + p->stime;
}
static inline cputime_t virt_ticks(struct task_struct *p)
{
@@ -248,8 +233,8 @@ void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times)
t = tsk;
do {
times->utime = cputime_add(times->utime, t->utime);
times->stime = cputime_add(times->stime, t->stime);
times->utime += t->utime;
times->stime += t->stime;
times->sum_exec_runtime += task_sched_runtime(t);
} while_each_thread(tsk, t);
out:
@@ -258,10 +243,10 @@ out:
static void update_gt_cputime(struct task_cputime *a, struct task_cputime *b)
{
if (cputime_gt(b->utime, a->utime))
if (b->utime > a->utime)
a->utime = b->utime;
if (cputime_gt(b->stime, a->stime))
if (b->stime > a->stime)
a->stime = b->stime;
if (b->sum_exec_runtime > a->sum_exec_runtime)
@@ -306,7 +291,7 @@ static int cpu_clock_sample_group(const clockid_t which_clock,
return -EINVAL;
case CPUCLOCK_PROF:
thread_group_cputime(p, &cputime);
cpu->cpu = cputime_add(cputime.utime, cputime.stime);
cpu->cpu = cputime.utime + cputime.stime;
break;
case CPUCLOCK_VIRT:
thread_group_cputime(p, &cputime);
@@ -470,26 +455,24 @@ static void cleanup_timers(struct list_head *head,
unsigned long long sum_exec_runtime)
{
struct cpu_timer_list *timer, *next;
cputime_t ptime = cputime_add(utime, stime);
cputime_t ptime = utime + stime;
list_for_each_entry_safe(timer, next, head, entry) {
list_del_init(&timer->entry);
if (cputime_lt(timer->expires.cpu, ptime)) {
timer->expires.cpu = cputime_zero;
if (timer->expires.cpu < ptime) {
timer->expires.cpu = 0;
} else {
timer->expires.cpu = cputime_sub(timer->expires.cpu,
ptime);
timer->expires.cpu -= ptime;
}
}
++head;
list_for_each_entry_safe(timer, next, head, entry) {
list_del_init(&timer->entry);
if (cputime_lt(timer->expires.cpu, utime)) {
timer->expires.cpu = cputime_zero;
if (timer->expires.cpu < utime) {
timer->expires.cpu = 0;
} else {
timer->expires.cpu = cputime_sub(timer->expires.cpu,
utime);
timer->expires.cpu -= utime;
}
}
@@ -520,8 +503,7 @@ void posix_cpu_timers_exit_group(struct task_struct *tsk)
struct signal_struct *const sig = tsk->signal;
cleanup_timers(tsk->signal->cpu_timers,
cputime_add(tsk->utime, sig->utime),
cputime_add(tsk->stime, sig->stime),
tsk->utime + sig->utime, tsk->stime + sig->stime,
tsk->se.sum_exec_runtime + sig->sum_sched_runtime);
}
@@ -540,8 +522,7 @@ static void clear_dead_task(struct k_itimer *timer, union cpu_time_count now)
static inline int expires_gt(cputime_t expires, cputime_t new_exp)
{
return cputime_eq(expires, cputime_zero) ||
cputime_gt(expires, new_exp);
return expires == 0 || expires > new_exp;
}
/*
@@ -651,7 +632,7 @@ static int cpu_timer_sample_group(const clockid_t which_clock,
default:
return -EINVAL;
case CPUCLOCK_PROF:
cpu->cpu = cputime_add(cputime.utime, cputime.stime);
cpu->cpu = cputime.utime + cputime.stime;
break;
case CPUCLOCK_VIRT:
cpu->cpu = cputime.utime;
@@ -918,12 +899,12 @@ static void check_thread_timers(struct task_struct *tsk,
unsigned long soft;
maxfire = 20;
tsk->cputime_expires.prof_exp = cputime_zero;
tsk->cputime_expires.prof_exp = 0;
while (!list_empty(timers)) {
struct cpu_timer_list *t = list_first_entry(timers,
struct cpu_timer_list,
entry);
if (!--maxfire || cputime_lt(prof_ticks(tsk), t->expires.cpu)) {
if (!--maxfire || prof_ticks(tsk) < t->expires.cpu) {
tsk->cputime_expires.prof_exp = t->expires.cpu;
break;
}
@@ -933,12 +914,12 @@ static void check_thread_timers(struct task_struct *tsk,
++timers;
maxfire = 20;
tsk->cputime_expires.virt_exp = cputime_zero;
tsk->cputime_expires.virt_exp = 0;
while (!list_empty(timers)) {
struct cpu_timer_list *t = list_first_entry(timers,
struct cpu_timer_list,
entry);
if (!--maxfire || cputime_lt(virt_ticks(tsk), t->expires.cpu)) {
if (!--maxfire || virt_ticks(tsk) < t->expires.cpu) {
tsk->cputime_expires.virt_exp = t->expires.cpu;
break;
}
@@ -1009,20 +990,19 @@ static u32 onecputick;
static void check_cpu_itimer(struct task_struct *tsk, struct cpu_itimer *it,
cputime_t *expires, cputime_t cur_time, int signo)
{
if (cputime_eq(it->expires, cputime_zero))
if (!it->expires)
return;
if (cputime_ge(cur_time, it->expires)) {
if (!cputime_eq(it->incr, cputime_zero)) {
it->expires = cputime_add(it->expires, it->incr);
if (cur_time >= it->expires) {
if (it->incr) {
it->expires += it->incr;
it->error += it->incr_error;
if (it->error >= onecputick) {
it->expires = cputime_sub(it->expires,
cputime_one_jiffy);
it->expires -= cputime_one_jiffy;
it->error -= onecputick;
}
} else {
it->expires = cputime_zero;
it->expires = 0;
}
trace_itimer_expire(signo == SIGPROF ?
@@ -1031,9 +1011,7 @@ static void check_cpu_itimer(struct task_struct *tsk, struct cpu_itimer *it,
__group_send_sig_info(signo, SEND_SIG_PRIV, tsk);
}
if (!cputime_eq(it->expires, cputime_zero) &&
(cputime_eq(*expires, cputime_zero) ||
cputime_lt(it->expires, *expires))) {
if (it->expires && (!*expires || it->expires < *expires)) {
*expires = it->expires;
}
}
@@ -1048,9 +1026,7 @@ static void check_cpu_itimer(struct task_struct *tsk, struct cpu_itimer *it,
*/
static inline int task_cputime_zero(const struct task_cputime *cputime)
{
if (cputime_eq(cputime->utime, cputime_zero) &&
cputime_eq(cputime->stime, cputime_zero) &&
cputime->sum_exec_runtime == 0)
if (!cputime->utime && !cputime->stime && !cputime->sum_exec_runtime)
return 1;
return 0;
}
@@ -1076,15 +1052,15 @@ static void check_process_timers(struct task_struct *tsk,
*/
thread_group_cputimer(tsk, &cputime);
utime = cputime.utime;
ptime = cputime_add(utime, cputime.stime);
ptime = utime + cputime.stime;
sum_sched_runtime = cputime.sum_exec_runtime;
maxfire = 20;
prof_expires = cputime_zero;
prof_expires = 0;
while (!list_empty(timers)) {
struct cpu_timer_list *tl = list_first_entry(timers,
struct cpu_timer_list,
entry);
if (!--maxfire || cputime_lt(ptime, tl->expires.cpu)) {
if (!--maxfire || ptime < tl->expires.cpu) {
prof_expires = tl->expires.cpu;
break;
}
@@ -1094,12 +1070,12 @@ static void check_process_timers(struct task_struct *tsk,
++timers;
maxfire = 20;
virt_expires = cputime_zero;
virt_expires = 0;
while (!list_empty(timers)) {
struct cpu_timer_list *tl = list_first_entry(timers,
struct cpu_timer_list,
entry);
if (!--maxfire || cputime_lt(utime, tl->expires.cpu)) {
if (!--maxfire || utime < tl->expires.cpu) {
virt_expires = tl->expires.cpu;
break;
}
@@ -1154,8 +1130,7 @@ static void check_process_timers(struct task_struct *tsk,
}
}
x = secs_to_cputime(soft);
if (cputime_eq(prof_expires, cputime_zero) ||
cputime_lt(x, prof_expires)) {
if (!prof_expires || x < prof_expires) {
prof_expires = x;
}
}
@@ -1249,12 +1224,9 @@ out:
static inline int task_cputime_expired(const struct task_cputime *sample,
const struct task_cputime *expires)
{
if (!cputime_eq(expires->utime, cputime_zero) &&
cputime_ge(sample->utime, expires->utime))
if (expires->utime && sample->utime >= expires->utime)
return 1;
if (!cputime_eq(expires->stime, cputime_zero) &&
cputime_ge(cputime_add(sample->utime, sample->stime),
expires->stime))
if (expires->stime && sample->utime + sample->stime >= expires->stime)
return 1;
if (expires->sum_exec_runtime != 0 &&
sample->sum_exec_runtime >= expires->sum_exec_runtime)
@@ -1389,18 +1361,18 @@ void set_process_cpu_timer(struct task_struct *tsk, unsigned int clock_idx,
* it to be relative, *newval argument is relative and we update
* it to be absolute.
*/
if (!cputime_eq(*oldval, cputime_zero)) {
if (cputime_le(*oldval, now.cpu)) {
if (*oldval) {
if (*oldval <= now.cpu) {
/* Just about to fire. */
*oldval = cputime_one_jiffy;
} else {
*oldval = cputime_sub(*oldval, now.cpu);
*oldval -= now.cpu;
}
}
if (cputime_eq(*newval, cputime_zero))
if (!*newval)
return;
*newval = cputime_add(*newval, now.cpu);
*newval += now.cpu;
}
/*

20
kernel/sched/Makefile Normal file
View File

@@ -0,0 +1,20 @@
ifdef CONFIG_FUNCTION_TRACER
CFLAGS_REMOVE_clock.o = -pg
endif
ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y)
# According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is
# needed for x86 only. Why this used to be enabled for all architectures is beyond
# me. I suspect most platforms don't need this, but until we know that for sure
# I turn this off for IA-64 only. Andreas Schwab says it's also needed on m68k
# to get a correct value for the wait-channel (WCHAN in ps). --davidm
CFLAGS_core.o := $(PROFILING) -fno-omit-frame-pointer
endif
obj-y += core.o clock.o idle_task.o fair.o rt.o stop_task.o
obj-$(CONFIG_SMP) += cpupri.o
obj-$(CONFIG_SCHED_AUTOGROUP) += auto_group.o
obj-$(CONFIG_SCHEDSTATS) += stats.o
obj-$(CONFIG_SCHED_DEBUG) += debug.o

33
kernel/sched_autogroup.c → kernel/sched/auto_group.c
View File

@@ -1,15 +1,19 @@
#ifdef CONFIG_SCHED_AUTOGROUP
#include "sched.h"
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/kallsyms.h>
#include <linux/utsname.h>
#include <linux/security.h>
#include <linux/export.h>
unsigned int __read_mostly sysctl_sched_autogroup_enabled = 1;
static struct autogroup autogroup_default;
static atomic_t autogroup_seq_nr;
static void __init autogroup_init(struct task_struct *init_task)
void __init autogroup_init(struct task_struct *init_task)
{
autogroup_default.tg = &root_task_group;
kref_init(&autogroup_default.kref);
@@ -17,7 +21,7 @@ static void __init autogroup_init(struct task_struct *init_task)
init_task->signal->autogroup = &autogroup_default;
}
static inline void autogroup_free(struct task_group *tg)
void autogroup_free(struct task_group *tg)
{
kfree(tg->autogroup);
}
@@ -59,10 +63,6 @@ static inline struct autogroup *autogroup_task_get(struct task_struct *p)
return ag;
}
#ifdef CONFIG_RT_GROUP_SCHED
static void free_rt_sched_group(struct task_group *tg);
#endif
static inline struct autogroup *autogroup_create(void)
{
struct autogroup *ag = kzalloc(sizeof(*ag), GFP_KERNEL);
@@ -108,8 +108,7 @@ out_fail:
return autogroup_kref_get(&autogroup_default);
}
static inline bool
task_wants_autogroup(struct task_struct *p, struct task_group *tg)
bool task_wants_autogroup(struct task_struct *p, struct task_group *tg)
{
if (tg != &root_task_group)
return false;
@@ -127,22 +126,6 @@ task_wants_autogroup(struct task_struct *p, struct task_group *tg)
return true;
}
static inline bool task_group_is_autogroup(struct task_group *tg)
{
return !!tg->autogroup;
}
static inline struct task_group *
autogroup_task_group(struct task_struct *p, struct task_group *tg)
{
int enabled = ACCESS_ONCE(sysctl_sched_autogroup_enabled);
if (enabled && task_wants_autogroup(p, tg))
return p->signal->autogroup->tg;
return tg;
}
static void
autogroup_move_group(struct task_struct *p, struct autogroup *ag)
{
@@ -263,7 +246,7 @@ out:
#endif /* CONFIG_PROC_FS */
#ifdef CONFIG_SCHED_DEBUG
static inline int autogroup_path(struct task_group *tg, char *buf, int buflen)
int autogroup_path(struct task_group *tg, char *buf, int buflen)
{
if (!task_group_is_autogroup(tg))
return 0;

26
kernel/sched_autogroup.h → kernel/sched/auto_group.h
View File

@@ -1,5 +1,8 @@
#ifdef CONFIG_SCHED_AUTOGROUP
#include <linux/kref.h>
#include <linux/rwsem.h>
struct autogroup {
/*
* reference doesn't mean how many thread attach to this
@@ -13,9 +16,28 @@ struct autogroup {
int nice;
};
static inline bool task_group_is_autogroup(struct task_group *tg);
extern void autogroup_init(struct task_struct *init_task);
extern void autogroup_free(struct task_group *tg);
static inline bool task_group_is_autogroup(struct task_group *tg)
{
return !!tg->autogroup;
}
extern bool task_wants_autogroup(struct task_struct *p, struct task_group *tg);
static inline struct task_group *
autogroup_task_group(struct task_struct *p, struct task_group *tg);
autogroup_task_group(struct task_struct *p, struct task_group *tg)
{
int enabled = ACCESS_ONCE(sysctl_sched_autogroup_enabled);
if (enabled && task_wants_autogroup(p, tg))
return p->signal->autogroup->tg;
return tg;
}
extern int autogroup_path(struct task_group *tg, char *buf, int buflen);
#else /* !CONFIG_SCHED_AUTOGROUP */

0
kernel/sched_clock.c → kernel/sched/clock.c
View File

2189
kernel/sched.c → kernel/sched/core.c
View File

File diff suppressed because it is too large Load Diff

4
kernel/sched_cpupri.c → kernel/sched/cpupri.c
View File

@@ -1,5 +1,5 @@
/*
* kernel/sched_cpupri.c
* kernel/sched/cpupri.c
*
* CPU priority management
*
@@ -28,7 +28,7 @@
*/
#include <linux/gfp.h>
#include "sched_cpupri.h"
#include "cpupri.h"
/* Convert between a 140 based task->prio, and our 102 based cpupri */
static int convert_prio(int prio)

0
kernel/sched_cpupri.h → kernel/sched/cpupri.h
View File

6
kernel/sched_debug.c → kernel/sched/debug.c
View File

@@ -1,5 +1,5 @@
/*
* kernel/time/sched_debug.c
* kernel/sched/debug.c
*
* Print the CFS rbtree
*
@@ -16,6 +16,8 @@
#include <linux/kallsyms.h>
#include <linux/utsname.h>
#include "sched.h"
static DEFINE_SPINLOCK(sched_debug_lock);
/*
@@ -373,7 +375,7 @@ static int sched_debug_show(struct seq_file *m, void *v)
return 0;
}
static void sysrq_sched_debug_show(void)
void sysrq_sched_debug_show(void)
{
sched_debug_show(NULL, NULL);
}

1002
kernel/sched_fair.c → kernel/sched/fair.c
View File

File diff suppressed because it is too large Load Diff

30
kernel/sched_features.h → kernel/sched/features.h
View File

@@ -3,13 +3,13 @@
* them to run sooner, but does not allow tons of sleepers to
* rip the spread apart.
*/
SCHED_FEAT(GENTLE_FAIR_SLEEPERS, 1)
SCHED_FEAT(GENTLE_FAIR_SLEEPERS, true)
/*
* Place new tasks ahead so that they do not starve already running
* tasks
*/
SCHED_FEAT(START_DEBIT, 1)
SCHED_FEAT(START_DEBIT, true)
/*
* Based on load and program behaviour, see if it makes sense to place
@@ -17,54 +17,54 @@ SCHED_FEAT(START_DEBIT, 1)
* improve cache locality. Typically used with SYNC wakeups as
* generated by pipes and the like, see also SYNC_WAKEUPS.
*/
SCHED_FEAT(AFFINE_WAKEUPS, 1)
SCHED_FEAT(AFFINE_WAKEUPS, true)
/*
* Prefer to schedule the task we woke last (assuming it failed
* wakeup-preemption), since its likely going to consume data we
* touched, increases cache locality.
*/
SCHED_FEAT(NEXT_BUDDY, 0)
SCHED_FEAT(NEXT_BUDDY, false)
/*
* Prefer to schedule the task that ran last (when we did
* wake-preempt) as that likely will touch the same data, increases
* cache locality.
*/
SCHED_FEAT(LAST_BUDDY, 1)
SCHED_FEAT(LAST_BUDDY, true)
/*
* Consider buddies to be cache hot, decreases the likelyness of a
* cache buddy being migrated away, increases cache locality.
*/
SCHED_FEAT(CACHE_HOT_BUDDY, 1)
SCHED_FEAT(CACHE_HOT_BUDDY, true)
/*
* Use arch dependent cpu power functions
*/
SCHED_FEAT(ARCH_POWER, 0)
SCHED_FEAT(ARCH_POWER, false)
SCHED_FEAT(HRTICK, 0)
SCHED_FEAT(DOUBLE_TICK, 0)
SCHED_FEAT(LB_BIAS, 1)
SCHED_FEAT(HRTICK, false)
SCHED_FEAT(DOUBLE_TICK, false)
SCHED_FEAT(LB_BIAS, true)
/*
* Spin-wait on mutex acquisition when the mutex owner is running on
* another cpu -- assumes that when the owner is running, it will soon
* release the lock. Decreases scheduling overhead.
*/
SCHED_FEAT(OWNER_SPIN, 1)
SCHED_FEAT(OWNER_SPIN, true)
/*
* Decrement CPU power based on time not spent running tasks
*/
SCHED_FEAT(NONTASK_POWER, 1)
SCHED_FEAT(NONTASK_POWER, true)
/*
* Queue remote wakeups on the target CPU and process them
* using the scheduler IPI. Reduces rq->lock contention/bounces.
*/
SCHED_FEAT(TTWU_QUEUE, 1)
SCHED_FEAT(TTWU_QUEUE, true)
SCHED_FEAT(FORCE_SD_OVERLAP, 0)
SCHED_FEAT(RT_RUNTIME_SHARE, 1)
SCHED_FEAT(FORCE_SD_OVERLAP, false)
SCHED_FEAT(RT_RUNTIME_SHARE, true)

4
kernel/sched_idletask.c → kernel/sched/idle_task.c
View File

@@ -1,3 +1,5 @@
#include "sched.h"
/*
* idle-task scheduling class.
*
@@ -71,7 +73,7 @@ static unsigned int get_rr_interval_idle(struct rq *rq, struct task_struct *task
/*
* Simple, special scheduling class for the per-CPU idle tasks:
*/
static const struct sched_class idle_sched_class = {
const struct sched_class idle_sched_class = {
/* .next is NULL */
/* no enqueue/yield_task for idle tasks */

218
kernel/sched_rt.c → kernel/sched/rt.c
View File

@@ -3,7 +3,92 @@
* policies)
*/
#include "sched.h"
#include <linux/slab.h>
static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun);
struct rt_bandwidth def_rt_bandwidth;
static enum hrtimer_restart sched_rt_period_timer(struct hrtimer *timer)
{
struct rt_bandwidth *rt_b =
container_of(timer, struct rt_bandwidth, rt_period_timer);
ktime_t now;
int overrun;
int idle = 0;
for (;;) {
now = hrtimer_cb_get_time(timer);
overrun = hrtimer_forward(timer, now, rt_b->rt_period);
if (!overrun)
break;
idle = do_sched_rt_period_timer(rt_b, overrun);
}
return idle ? HRTIMER_NORESTART : HRTIMER_RESTART;
}
void init_rt_bandwidth(struct rt_bandwidth *rt_b, u64 period, u64 runtime)
{
rt_b->rt_period = ns_to_ktime(period);
rt_b->rt_runtime = runtime;
raw_spin_lock_init(&rt_b->rt_runtime_lock);
hrtimer_init(&rt_b->rt_period_timer,
CLOCK_MONOTONIC, HRTIMER_MODE_REL);
rt_b->rt_period_timer.function = sched_rt_period_timer;
}
static void start_rt_bandwidth(struct rt_bandwidth *rt_b)
{
if (!rt_bandwidth_enabled() || rt_b->rt_runtime == RUNTIME_INF)
return;
if (hrtimer_active(&rt_b->rt_period_timer))
return;
raw_spin_lock(&rt_b->rt_runtime_lock);
start_bandwidth_timer(&rt_b->rt_period_timer, rt_b->rt_period);
raw_spin_unlock(&rt_b->rt_runtime_lock);
}
void init_rt_rq(struct rt_rq *rt_rq, struct rq *rq)
{
struct rt_prio_array *array;
int i;
array = &rt_rq->active;
for (i = 0; i < MAX_RT_PRIO; i++) {
INIT_LIST_HEAD(array->queue + i);
__clear_bit(i, array->bitmap);
}
/* delimiter for bitsearch: */
__set_bit(MAX_RT_PRIO, array->bitmap);
#if defined CONFIG_SMP
rt_rq->highest_prio.curr = MAX_RT_PRIO;
rt_rq->highest_prio.next = MAX_RT_PRIO;
rt_rq->rt_nr_migratory = 0;
rt_rq->overloaded = 0;
plist_head_init(&rt_rq->pushable_tasks);
#endif
rt_rq->rt_time = 0;
rt_rq->rt_throttled = 0;
rt_rq->rt_runtime = 0;
raw_spin_lock_init(&rt_rq->rt_runtime_lock);
}
#ifdef CONFIG_RT_GROUP_SCHED
static void destroy_rt_bandwidth(struct rt_bandwidth *rt_b)
{
hrtimer_cancel(&rt_b->rt_period_timer);
}
#define rt_entity_is_task(rt_se) (!(rt_se)->my_q)
@@ -25,6 +110,91 @@ static inline struct rt_rq *rt_rq_of_se(struct sched_rt_entity *rt_se)
return rt_se->rt_rq;
}
void free_rt_sched_group(struct task_group *tg)
{
int i;
if (tg->rt_se)
destroy_rt_bandwidth(&tg->rt_bandwidth);
for_each_possible_cpu(i) {
if (tg->rt_rq)
kfree(tg->rt_rq[i]);
if (tg->rt_se)
kfree(tg->rt_se[i]);
}
kfree(tg->rt_rq);
kfree(tg->rt_se);
}
void init_tg_rt_entry(struct task_group *tg, struct rt_rq *rt_rq,
struct sched_rt_entity *rt_se, int cpu,
struct sched_rt_entity *parent)
{
struct rq *rq = cpu_rq(cpu);
rt_rq->highest_prio.curr = MAX_RT_PRIO;
rt_rq->rt_nr_boosted = 0;
rt_rq->rq = rq;
rt_rq->tg = tg;
tg->rt_rq[cpu] = rt_rq;
tg->rt_se[cpu] = rt_se;
if (!rt_se)
return;
if (!parent)
rt_se->rt_rq = &rq->rt;
else
rt_se->rt_rq = parent->my_q;
rt_se->my_q = rt_rq;
rt_se->parent = parent;
INIT_LIST_HEAD(&rt_se->run_list);
}
int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
{
struct rt_rq *rt_rq;
struct sched_rt_entity *rt_se;
int i;
tg->rt_rq = kzalloc(sizeof(rt_rq) * nr_cpu_ids, GFP_KERNEL);
if (!tg->rt_rq)
goto err;
tg->rt_se = kzalloc(sizeof(rt_se) * nr_cpu_ids, GFP_KERNEL);
if (!tg->rt_se)
goto err;
init_rt_bandwidth(&tg->rt_bandwidth,
ktime_to_ns(def_rt_bandwidth.rt_period), 0);
for_each_possible_cpu(i) {
rt_rq = kzalloc_node(sizeof(struct rt_rq),
GFP_KERNEL, cpu_to_node(i));
if (!rt_rq)
goto err;
rt_se = kzalloc_node(sizeof(struct sched_rt_entity),
GFP_KERNEL, cpu_to_node(i));
if (!rt_se)
goto err_free_rq;
init_rt_rq(rt_rq, cpu_rq(i));
rt_rq->rt_runtime = tg->rt_bandwidth.rt_runtime;
init_tg_rt_entry(tg, rt_rq, rt_se, i, parent->rt_se[i]);
}
return 1;
err_free_rq:
kfree(rt_rq);
err:
return 0;
}
#else /* CONFIG_RT_GROUP_SCHED */
#define rt_entity_is_task(rt_se) (1)
@@ -47,6 +217,12 @@ static inline struct rt_rq *rt_rq_of_se(struct sched_rt_entity *rt_se)
return &rq->rt;
}
void free_rt_sched_group(struct task_group *tg) { }
int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
{
return 1;
}
#endif /* CONFIG_RT_GROUP_SCHED */
#ifdef CONFIG_SMP
@@ -556,6 +732,28 @@ static void enable_runtime(struct rq *rq)
raw_spin_unlock_irqrestore(&rq->lock, flags);
}
int update_runtime(struct notifier_block *nfb, unsigned long action, void *hcpu)
{
int cpu = (int)(long)hcpu;
switch (action) {
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
disable_runtime(cpu_rq(cpu));
return NOTIFY_OK;
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN:
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
enable_runtime(cpu_rq(cpu));
return NOTIFY_OK;
default:
return NOTIFY_DONE;
}
}
static int balance_runtime(struct rt_rq *rt_rq)
{
int more = 0;
@@ -648,7 +846,7 @@ static int sched_rt_runtime_exceeded(struct rt_rq *rt_rq)
if (rt_rq->rt_throttled)
return rt_rq_throttled(rt_rq);
if (sched_rt_runtime(rt_rq) >= sched_rt_period(rt_rq))
if (runtime >= sched_rt_period(rt_rq))
return 0;
balance_runtime(rt_rq);
@@ -957,8 +1155,8 @@ static void dequeue_task_rt(struct rq *rq, struct task_struct *p, int flags)
}
/*
* Put task to the end of the run list without the overhead of dequeue
* followed by enqueue.
* Put task to the head or the end of the run list without the overhead of
* dequeue followed by enqueue.
*/
static void
requeue_rt_entity(struct rt_rq *rt_rq, struct sched_rt_entity *rt_se, int head)
@@ -1002,6 +1200,9 @@ select_task_rq_rt(struct task_struct *p, int sd_flag, int flags)
cpu = task_cpu(p);
if (p->rt.nr_cpus_allowed == 1)
goto out;
/* For anything but wake ups, just return the task_cpu */
if (sd_flag != SD_BALANCE_WAKE && sd_flag != SD_BALANCE_FORK)
goto out;
@@ -1178,8 +1379,6 @@ static void put_prev_task_rt(struct rq *rq, struct task_struct *p)
/* Only try algorithms three times */
#define RT_MAX_TRIES 3
static void deactivate_task(struct rq *rq, struct task_struct *p, int sleep);
static int pick_rt_task(struct rq *rq, struct task_struct *p, int cpu)
{
if (!task_running(rq, p) &&
@@ -1653,13 +1852,14 @@ static void switched_from_rt(struct rq *rq, struct task_struct *p)
pull_rt_task(rq);
}
static inline void init_sched_rt_class(void)
void init_sched_rt_class(void)
{
unsigned int i;
for_each_possible_cpu(i)
for_each_possible_cpu(i) {
zalloc_cpumask_var_node(&per_cpu(local_cpu_mask, i),
GFP_KERNEL, cpu_to_node(i));
}
}
#endif /* CONFIG_SMP */
@@ -1800,7 +2000,7 @@ static unsigned int get_rr_interval_rt(struct rq *rq, struct task_struct *task)
return 0;
}
static const struct sched_class rt_sched_class = {
const struct sched_class rt_sched_class = {
.next = &fair_sched_class,
.enqueue_task = enqueue_task_rt,
.dequeue_task = dequeue_task_rt,
@@ -1835,7 +2035,7 @@ static const struct sched_class rt_sched_class = {
#ifdef CONFIG_SCHED_DEBUG
extern void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq);
static void print_rt_stats(struct seq_file *m, int cpu)
void print_rt_stats(struct seq_file *m, int cpu)
{
rt_rq_iter_t iter;
struct rt_rq *rt_rq;

1166
kernel/sched/sched.h Normal file
View File

File diff suppressed because it is too large Load Diff

111
kernel/sched/stats.c Normal file
View File

@@ -0,0 +1,111 @@
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <linux/proc_fs.h>
#include "sched.h"
/*
* bump this up when changing the output format or the meaning of an existing
* format, so that tools can adapt (or abort)
*/
#define SCHEDSTAT_VERSION 15
static int show_schedstat(struct seq_file *seq, void *v)
{
int cpu;
int mask_len = DIV_ROUND_UP(NR_CPUS, 32) * 9;
char *mask_str = kmalloc(mask_len, GFP_KERNEL);
if (mask_str == NULL)
return -ENOMEM;
seq_printf(seq, "version %d\n", SCHEDSTAT_VERSION);
seq_printf(seq, "timestamp %lu\n", jiffies);
for_each_online_cpu(cpu) {
struct rq *rq = cpu_rq(cpu);
#ifdef CONFIG_SMP
struct sched_domain *sd;
int dcount = 0;
#endif
/* runqueue-specific stats */
seq_printf(seq,
"cpu%d %u %u %u %u %u %u %llu %llu %lu",
cpu, rq->yld_count,
rq->sched_switch, rq->sched_count, rq->sched_goidle,
rq->ttwu_count, rq->ttwu_local,
rq->rq_cpu_time,
rq->rq_sched_info.run_delay, rq->rq_sched_info.pcount);
seq_printf(seq, "\n");
#ifdef CONFIG_SMP
/* domain-specific stats */
rcu_read_lock();
for_each_domain(cpu, sd) {
enum cpu_idle_type itype;
cpumask_scnprintf(mask_str, mask_len,
sched_domain_span(sd));
seq_printf(seq, "domain%d %s", dcount++, mask_str);
for (itype = CPU_IDLE; itype < CPU_MAX_IDLE_TYPES;
itype++) {
seq_printf(seq, " %u %u %u %u %u %u %u %u",
sd->lb_count[itype],
sd->lb_balanced[itype],
sd->lb_failed[itype],
sd->lb_imbalance[itype],
sd->lb_gained[itype],
sd->lb_hot_gained[itype],
sd->lb_nobusyq[itype],
sd->lb_nobusyg[itype]);
}
seq_printf(seq,
" %u %u %u %u %u %u %u %u %u %u %u %u\n",
sd->alb_count, sd->alb_failed, sd->alb_pushed,
sd->sbe_count, sd->sbe_balanced, sd->sbe_pushed,
sd->sbf_count, sd->sbf_balanced, sd->sbf_pushed,
sd->ttwu_wake_remote, sd->ttwu_move_affine,
sd->ttwu_move_balance);
}
rcu_read_unlock();
#endif
}
kfree(mask_str);
return 0;
}
static int schedstat_open(struct inode *inode, struct file *file)
{
unsigned int size = PAGE_SIZE * (1 + num_online_cpus() / 32);
char *buf = kmalloc(size, GFP_KERNEL);
struct seq_file *m;
int res;
if (!buf)
return -ENOMEM;
res = single_open(file, show_schedstat, NULL);
if (!res) {
m = file->private_data;
m->buf = buf;
m->size = size;
} else
kfree(buf);
return res;
}
static const struct file_operations proc_schedstat_operations = {
.open = schedstat_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init proc_schedstat_init(void)
{
proc_create("schedstat", 0, NULL, &proc_schedstat_operations);
return 0;
}
module_init(proc_schedstat_init);

109
kernel/sched_stats.h → kernel/sched/stats.h
View File

@@ -1,108 +1,5 @@
#ifdef CONFIG_SCHEDSTATS
/*
* bump this up when changing the output format or the meaning of an existing
* format, so that tools can adapt (or abort)
*/
#define SCHEDSTAT_VERSION 15
static int show_schedstat(struct seq_file *seq, void *v)
{
int cpu;
int mask_len = DIV_ROUND_UP(NR_CPUS, 32) * 9;
char *mask_str = kmalloc(mask_len, GFP_KERNEL);
if (mask_str == NULL)
return -ENOMEM;
seq_printf(seq, "version %d\n", SCHEDSTAT_VERSION);
seq_printf(seq, "timestamp %lu\n", jiffies);
for_each_online_cpu(cpu) {
struct rq *rq = cpu_rq(cpu);
#ifdef CONFIG_SMP
struct sched_domain *sd;
int dcount = 0;
#endif
/* runqueue-specific stats */
seq_printf(seq,
"cpu%d %u %u %u %u %u %u %llu %llu %lu",
cpu, rq->yld_count,
rq->sched_switch, rq->sched_count, rq->sched_goidle,
rq->ttwu_count, rq->ttwu_local,
rq->rq_cpu_time,
rq->rq_sched_info.run_delay, rq->rq_sched_info.pcount);
seq_printf(seq, "\n");
#ifdef CONFIG_SMP
/* domain-specific stats */
rcu_read_lock();
for_each_domain(cpu, sd) {
enum cpu_idle_type itype;
cpumask_scnprintf(mask_str, mask_len,
sched_domain_span(sd));
seq_printf(seq, "domain%d %s", dcount++, mask_str);
for (itype = CPU_IDLE; itype < CPU_MAX_IDLE_TYPES;
itype++) {
seq_printf(seq, " %u %u %u %u %u %u %u %u",
sd->lb_count[itype],
sd->lb_balanced[itype],
sd->lb_failed[itype],
sd->lb_imbalance[itype],
sd->lb_gained[itype],
sd->lb_hot_gained[itype],
sd->lb_nobusyq[itype],
sd->lb_nobusyg[itype]);
}
seq_printf(seq,
" %u %u %u %u %u %u %u %u %u %u %u %u\n",
sd->alb_count, sd->alb_failed, sd->alb_pushed,
sd->sbe_count, sd->sbe_balanced, sd->sbe_pushed,
sd->sbf_count, sd->sbf_balanced, sd->sbf_pushed,
sd->ttwu_wake_remote, sd->ttwu_move_affine,
sd->ttwu_move_balance);
}
rcu_read_unlock();
#endif
}
kfree(mask_str);
return 0;
}
static int schedstat_open(struct inode *inode, struct file *file)
{
unsigned int size = PAGE_SIZE * (1 + num_online_cpus() / 32);
char *buf = kmalloc(size, GFP_KERNEL);
struct seq_file *m;
int res;
if (!buf)
return -ENOMEM;
res = single_open(file, show_schedstat, NULL);
if (!res) {
m = file->private_data;
m->buf = buf;
m->size = size;
} else
kfree(buf);
return res;
}
static const struct file_operations proc_schedstat_operations = {
.open = schedstat_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init proc_schedstat_init(void)
{
proc_create("schedstat", 0, NULL, &proc_schedstat_operations);
return 0;
}
module_init(proc_schedstat_init);
/*
* Expects runqueue lock to be held for atomicity of update
@@ -283,8 +180,7 @@ static inline void account_group_user_time(struct task_struct *tsk,
return;
raw_spin_lock(&cputimer->lock);
cputimer->cputime.utime =
cputime_add(cputimer->cputime.utime, cputime);
cputimer->cputime.utime += cputime;
raw_spin_unlock(&cputimer->lock);
}
@@ -307,8 +203,7 @@ static inline void account_group_system_time(struct task_struct *tsk,
return;
raw_spin_lock(&cputimer->lock);
cputimer->cputime.stime =
cputime_add(cputimer->cputime.stime, cputime);
cputimer->cputime.stime += cputime;
raw_spin_unlock(&cputimer->lock);
}

4
kernel/sched_stoptask.c → kernel/sched/stop_task.c
View File

@@ -1,3 +1,5 @@
#include "sched.h"
/*
* stop-task scheduling class.
*
@@ -80,7 +82,7 @@ get_rr_interval_stop(struct rq *rq, struct task_struct *task)
/*
* Simple, special scheduling class for the per-CPU stop tasks:
*/
static const struct sched_class stop_sched_class = {
const struct sched_class stop_sched_class = {
.next = &rt_sched_class,
.enqueue_task = enqueue_task_stop,

6
kernel/signal.c
View File

@@ -1629,10 +1629,8 @@ bool do_notify_parent(struct task_struct *tsk, int sig)
info.si_uid = __task_cred(tsk)->uid;
rcu_read_unlock();
info.si_utime = cputime_to_clock_t(cputime_add(tsk->utime,
tsk->signal->utime));
info.si_stime = cputime_to_clock_t(cputime_add(tsk->stime,
tsk->signal->stime));
info.si_utime = cputime_to_clock_t(tsk->utime + tsk->signal->utime);
info.si_stime = cputime_to_clock_t(tsk->stime + tsk->signal->stime);
info.si_status = tsk->exit_code & 0x7f;
if (tsk->exit_code & 0x80)

6
kernel/sys.c
View File

@@ -1605,7 +1605,7 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
unsigned long maxrss = 0;
memset((char *) r, 0, sizeof *r);
utime = stime = cputime_zero;
utime = stime = 0;
if (who == RUSAGE_THREAD) {
task_times(current, &utime, &stime);
@@ -1635,8 +1635,8 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
case RUSAGE_SELF:
thread_group_times(p, &tgutime, &tgstime);
utime = cputime_add(utime, tgutime);
stime = cputime_add(stime, tgstime);
utime += tgutime;
stime += tgstime;
r->ru_nvcsw += p->signal->nvcsw;
r->ru_nivcsw += p->signal->nivcsw;
r->ru_minflt += p->signal->min_flt;

8
kernel/time/tick-sched.c
View File

@@ -466,6 +466,14 @@ void tick_nohz_idle_enter(void)
WARN_ON_ONCE(irqs_disabled());
/*
* Update the idle state in the scheduler domain hierarchy
* when tick_nohz_stop_sched_tick() is called from the idle loop.
* State will be updated to busy during the first busy tick after
* exiting idle.
*/
set_cpu_sd_state_idle();
local_irq_disable();
ts = &__get_cpu_var(tick_cpu_sched);

2
kernel/tsacct.c
View File

@@ -127,7 +127,7 @@ void acct_update_integrals(struct task_struct *tsk)
local_irq_save(flags);
time = tsk->stime + tsk->utime;
dtime = cputime_sub(time, tsk->acct_timexpd);
dtime = time - tsk->acct_timexpd;
jiffies_to_timeval(cputime_to_jiffies(dtime), &value);
delta = value.tv_sec;
delta = delta * USEC_PER_SEC + value.tv_usec;