diff options
| author | Andi Kleen <andi@firstfloor.org> | 2010-11-22 14:36:54 +0100 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2010-11-22 15:20:28 +0100 |
| commit | ac2b116e36c697e96f06fdbd2e77d2bf6b0c2fb0 (patch) | |
| tree | c7b2d55970ce7b9cd567d5fd8b0daf9a28f56ebf | |
| parent | aa817b2243580b8375d2cb18ad326530c7a74e33 (diff) | |
| download | linux-mce-2.6-mce/cmci.tar.gz | |
DEBUG: Trace poll timer frequencymce/cmci
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/mce.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index 95cf1f0697f86a..2129c0d1e8f6b9 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -1159,6 +1159,7 @@ static void mce_start_timer(unsigned long data) struct timer_list *t; int *n; int i; + int old; if (mce_available(¤t_cpu_data)) { machine_check_poll(MCP_TIMESTAMP, @@ -1172,10 +1173,13 @@ static void mce_start_timer(unsigned long data) * Only round timers when there are no errors. */ n = &__get_cpu_var(mce_next_interval); + old = *n; if (mce_notify_irq()) *n = max_t(int, *n/2, msecs_to_jiffies(check_min_interval)); else if ((*n *= 2) >= check_interval * HZ) *n = round_jiffies_relative(check_interval * HZ); + if (*n != old) + trace_printk("MCE timer frequency changed %d -> %d\n", old, *n); /* * Cycle timer through the available thread siblings. @@ -1189,6 +1193,10 @@ static void mce_start_timer(unsigned long data) t->expires = jiffies + *n; add_timer_on(t, i); + + if (i != smp_processor_id()) + trace_printk("MCE timer cpu %d moved to %d\n", + smp_processor_id(), i); } static void mce_do_trigger(struct work_struct *work) @@ -1430,6 +1438,8 @@ static void __mcheck_cpu_init_timer(void) del_timer_sync(&per_cpu(mce_timer, i)); del_timer_sync(&per_cpu(mce_timer, cpu)); + printk(KERN_INFO "MCE: CPU %d: started MCA poll timer\n", cpu); + *n = check_interval * HZ; if (!*n) return; |