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Merge git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

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* git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] wire up pselect, ppoll
  [IA64] Add TIF_RESTORE_SIGMASK
  [IA64] unwind did not work for processes born with CLONE_STOPPED
  [IA64] Optional method to purge the TLB on SN systems
  [IA64] SPIN_LOCK_UNLOCKED macro cleanup in arch/ia64
  [IA64-SN2][KJ] mmtimer.c-kzalloc
  [IA64] fix stack alignment for ia32 signal handlers
  [IA64] - Altix: hotplug after intr redirect can crash system
  [IA64] save and restore cpus_allowed in cpu_idle_wait
  [IA64] Removal of percpu TR cleanup in kexec code
  [IA64] Fix some section mismatch errors
This commit is contained in:
Linus Torvalds
2007-05-09 13:38:45 -07:00
parent ba7cc09c9c e180583b85
commit 38cb162b75
23 changed files with 276 additions and 221 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
arch/ia64/sn/kernel/irq.c
View File

@@ -59,6 +59,22 @@ void sn_intr_free(nasid_t local_nasid, int local_widget,
(u64) sn_irq_info->irq_cookie, 0, 0);
}
u64 sn_intr_redirect(nasid_t local_nasid, int local_widget,
struct sn_irq_info *sn_irq_info,
nasid_t req_nasid, int req_slice)
{
struct ia64_sal_retval ret_stuff;
ret_stuff.status = 0;
ret_stuff.v0 = 0;
SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_INTERRUPT,
(u64) SAL_INTR_REDIRECT, (u64) local_nasid,
(u64) local_widget, __pa(sn_irq_info),
(u64) req_nasid, (u64) req_slice, 0);
return ret_stuff.status;
}
static unsigned int sn_startup_irq(unsigned int irq)
{
return 0;
@@ -127,15 +143,8 @@ struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *sn_irq_info,
struct sn_irq_info *new_irq_info;
struct sn_pcibus_provider *pci_provider;
new_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_ATOMIC);
if (new_irq_info == NULL)
return NULL;
memcpy(new_irq_info, sn_irq_info, sizeof(struct sn_irq_info));
bridge = (u64) new_irq_info->irq_bridge;
bridge = (u64) sn_irq_info->irq_bridge;
if (!bridge) {
kfree(new_irq_info);
return NULL; /* irq is not a device interrupt */
}
@@ -145,8 +154,25 @@ struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *sn_irq_info,
local_widget = TIO_SWIN_WIDGETNUM(bridge);
else
local_widget = SWIN_WIDGETNUM(bridge);
vector = sn_irq_info->irq_irq;
/* Make use of SAL_INTR_REDIRECT if PROM supports it */
status = sn_intr_redirect(local_nasid, local_widget, sn_irq_info, nasid, slice);
if (!status) {
new_irq_info = sn_irq_info;
goto finish_up;
}
/*
* PROM does not support SAL_INTR_REDIRECT, or it failed.
* Revert to old method.
*/
new_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_ATOMIC);
if (new_irq_info == NULL)
return NULL;
memcpy(new_irq_info, sn_irq_info, sizeof(struct sn_irq_info));
/* Free the old PROM new_irq_info structure */
sn_intr_free(local_nasid, local_widget, new_irq_info);
unregister_intr_pda(new_irq_info);
@@ -162,11 +188,18 @@ struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *sn_irq_info,
return NULL;
}
register_intr_pda(new_irq_info);
spin_lock(&sn_irq_info_lock);
list_replace_rcu(&sn_irq_info->list, &new_irq_info->list);
spin_unlock(&sn_irq_info_lock);
call_rcu(&sn_irq_info->rcu, sn_irq_info_free);
finish_up:
/* Update kernels new_irq_info with new target info */
cpuid = nasid_slice_to_cpuid(new_irq_info->irq_nasid,
new_irq_info->irq_slice);
new_irq_info->irq_cpuid = cpuid;
register_intr_pda(new_irq_info);
pci_provider = sn_pci_provider[new_irq_info->irq_bridge_type];
@@ -178,11 +211,6 @@ struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *sn_irq_info,
pci_provider && pci_provider->target_interrupt)
(pci_provider->target_interrupt)(new_irq_info);
spin_lock(&sn_irq_info_lock);
list_replace_rcu(&sn_irq_info->list, &new_irq_info->list);
spin_unlock(&sn_irq_info_lock);
call_rcu(&sn_irq_info->rcu, sn_irq_info_free);
#ifdef CONFIG_SMP
cpuphys = cpu_physical_id(cpuid);
set_irq_affinity_info((vector & 0xff), cpuphys, 0);

65
arch/ia64/sn/kernel/sn2/sn2_smp.c
View File

@@ -46,6 +46,9 @@ DECLARE_PER_CPU(struct ptc_stats, ptcstats);
static __cacheline_aligned DEFINE_SPINLOCK(sn2_global_ptc_lock);
/* 0 = old algorithm (no IPI flushes), 1 = ipi deadlock flush, 2 = ipi instead of SHUB ptc, >2 = always ipi */
static int sn2_flush_opt = 0;
extern unsigned long
sn2_ptc_deadlock_recovery_core(volatile unsigned long *, unsigned long,
volatile unsigned long *, unsigned long,
@@ -76,6 +79,8 @@ struct ptc_stats {
unsigned long shub_itc_clocks;
unsigned long shub_itc_clocks_max;
unsigned long shub_ptc_flushes_not_my_mm;
unsigned long shub_ipi_flushes;
unsigned long shub_ipi_flushes_itc_clocks;
};
#define sn2_ptctest 0
@@ -121,6 +126,18 @@ void sn_tlb_migrate_finish(struct mm_struct *mm)
flush_tlb_mm(mm);
}
static void
sn2_ipi_flush_all_tlb(struct mm_struct *mm)
{
unsigned long itc;
itc = ia64_get_itc();
smp_flush_tlb_cpumask(mm->cpu_vm_mask);
itc = ia64_get_itc() - itc;
__get_cpu_var(ptcstats).shub_ipi_flushes_itc_clocks += itc;
__get_cpu_var(ptcstats).shub_ipi_flushes++;
}
/**
* sn2_global_tlb_purge - globally purge translation cache of virtual address range
* @mm: mm_struct containing virtual address range
@@ -154,7 +171,12 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
unsigned long itc, itc2, flags, data0 = 0, data1 = 0, rr_value, old_rr = 0;
short nasids[MAX_NUMNODES], nix;
nodemask_t nodes_flushed;
int active, max_active, deadlock;
int active, max_active, deadlock, flush_opt = sn2_flush_opt;
if (flush_opt > 2) {
sn2_ipi_flush_all_tlb(mm);
return;
}
nodes_clear(nodes_flushed);
i = 0;
@@ -189,6 +211,12 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
return;
}
if (flush_opt == 2) {
sn2_ipi_flush_all_tlb(mm);
preempt_enable();
return;
}
itc = ia64_get_itc();
nix = 0;
for_each_node_mask(cnode, nodes_flushed)
@@ -256,6 +284,8 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
}
if (active >= max_active || i == (nix - 1)) {
if ((deadlock = wait_piowc())) {
if (flush_opt == 1)
goto done;
sn2_ptc_deadlock_recovery(nasids, ibegin, i, mynasid, ptc0, data0, ptc1, data1);
if (reset_max_active_on_deadlock())
max_active = 1;
@@ -267,6 +297,7 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
start += (1UL << nbits);
} while (start < end);
done:
itc2 = ia64_get_itc() - itc2;
__get_cpu_var(ptcstats).shub_itc_clocks += itc2;
if (itc2 > __get_cpu_var(ptcstats).shub_itc_clocks_max)
@@ -279,6 +310,11 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
spin_unlock_irqrestore(PTC_LOCK(shub1), flags);
if (flush_opt == 1 && deadlock) {
__get_cpu_var(ptcstats).deadlocks++;
sn2_ipi_flush_all_tlb(mm);
}
preempt_enable();
}
@@ -425,24 +461,42 @@ static int sn2_ptc_seq_show(struct seq_file *file, void *data)
if (!cpu) {
seq_printf(file,
"# cpu ptc_l newrid ptc_flushes nodes_flushed deadlocks lock_nsec shub_nsec shub_nsec_max not_my_mm deadlock2\n");
seq_printf(file, "# ptctest %d\n", sn2_ptctest);
"# cpu ptc_l newrid ptc_flushes nodes_flushed deadlocks lock_nsec shub_nsec shub_nsec_max not_my_mm deadlock2 ipi_fluches ipi_nsec\n");
seq_printf(file, "# ptctest %d, flushopt %d\n", sn2_ptctest, sn2_flush_opt);
}
if (cpu < NR_CPUS && cpu_online(cpu)) {
stat = &per_cpu(ptcstats, cpu);
seq_printf(file, "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld\n", cpu, stat->ptc_l,
seq_printf(file, "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld\n", cpu, stat->ptc_l,
stat->change_rid, stat->shub_ptc_flushes, stat->nodes_flushed,
stat->deadlocks,
1000 * stat->lock_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec,
1000 * stat->shub_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec,
1000 * stat->shub_itc_clocks_max / per_cpu(cpu_info, cpu).cyc_per_usec,
stat->shub_ptc_flushes_not_my_mm,
stat->deadlocks2);
stat->deadlocks2,
stat->shub_ipi_flushes,
1000 * stat->shub_ipi_flushes_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec);
}
return 0;
}
static ssize_t sn2_ptc_proc_write(struct file *file, const char __user *user, size_t count, loff_t *data)
{
int cpu;
char optstr[64];
if (copy_from_user(optstr, user, count))
return -EFAULT;
optstr[count - 1] = '\0';
sn2_flush_opt = simple_strtoul(optstr, NULL, 0);
for_each_online_cpu(cpu)
memset(&per_cpu(ptcstats, cpu), 0, sizeof(struct ptc_stats));
return count;
}
static struct seq_operations sn2_ptc_seq_ops = {
.start = sn2_ptc_seq_start,
.next = sn2_ptc_seq_next,
@@ -458,6 +512,7 @@ static int sn2_ptc_proc_open(struct inode *inode, struct file *file)
static const struct file_operations proc_sn2_ptc_operations = {
.open = sn2_ptc_proc_open,
.read = seq_read,
.write = sn2_ptc_proc_write,
.llseek = seq_lseek,
.release = seq_release,
};