diff options
| author | Ingo Molnar <mingo@elte.hu> | 2007-10-16 23:26:06 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-11-26 09:42:32 -0800 |
| commit | fd5ec14e724268168221b7210fb36a223bd09c11 (patch) | |
| tree | 41146bc993aaa68458f91a19954f72d21cad7de3 /kernel | |
| parent | 00aceb500c508412f70b71c78471fcf80a9498c2 (diff) | |
softlockup: use cpu_clock() instead of sched_clock()
patch a3b13c23f186ecb57204580cc1f2dbe9c284953a in mainline.
sched_clock() is not a reliable time-source, use cpu_clock() instead.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/softlockup.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/softlockup.c b/kernel/softlockup.c index def081b8a5b3..d857bb0616ad 100644 --- a/kernel/softlockup.c +++ b/kernel/softlockup.c @@ -43,14 +43,16 @@ static struct notifier_block panic_block = { * resolution, and we don't need to waste time with a big divide when * 2^30ns == 1.074s. */ -static unsigned long get_timestamp(void) +static unsigned long get_timestamp(int this_cpu) { - return sched_clock() >> 30; /* 2^30 ~= 10^9 */ + return cpu_clock(this_cpu) >> 30; /* 2^30 ~= 10^9 */ } void touch_softlockup_watchdog(void) { - __raw_get_cpu_var(touch_timestamp) = get_timestamp(); + int this_cpu = raw_smp_processor_id(); + + __raw_get_cpu_var(touch_timestamp) = get_timestamp(this_cpu); } EXPORT_SYMBOL(touch_softlockup_watchdog); @@ -96,7 +98,7 @@ void softlockup_tick(void) return; } - now = get_timestamp(); + now = get_timestamp(this_cpu); /* Wake up the high-prio watchdog task every second: */ if (now > (touch_timestamp + 1)) |