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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-05-08 00:28:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:06 -0700 |
| commit | 04c9167f91e309c9c4ea982992aa08e83b2eb42e (patch) | |
| tree | b15e7bed8eb2e22e96971bbe3156a00683c70909 /include/linux/sched.h | |
| parent | 966812dc98e6a7fcdf759cbfa0efab77500a8868 (diff) | |
| download | linux-04c9167f91e309c9c4ea982992aa08e83b2eb42e.tar.gz linux-04c9167f91e309c9c4ea982992aa08e83b2eb42e.tar.bz2 linux-04c9167f91e309c9c4ea982992aa08e83b2eb42e.zip | |
add touch_all_softlockup_watchdogs()
Add touch_all_softlockup_watchdogs() to allow the softlockup watchdog
timers on all cpus to be updated. This is used to prevent sysrq-t from
generating a spurious watchdog message when generating lots of output.
Softlockup watchdogs use sched_clock() as its timebase, which is inherently
per-cpu (at least, when it is measuring unstolen time). Because of this,
it isn't possible for one CPU to directly update the other CPU's timers,
but it is possible to tell the other CPUs to do update themselves
appropriately.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Acked-by: Chris Lalancette <clalance@redhat.com>
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Rick Lindsley <ricklind@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index d464bd0d6578..6312521df2c1 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -226,6 +226,7 @@ extern void scheduler_tick(void); extern void softlockup_tick(void); extern void spawn_softlockup_task(void); extern void touch_softlockup_watchdog(void); +extern void touch_all_softlockup_watchdogs(void); #else static inline void softlockup_tick(void) { @@ -236,6 +237,9 @@ static inline void spawn_softlockup_task(void) static inline void touch_softlockup_watchdog(void) { } +static inline void touch_all_softlockup_watchdogs(void) +{ +} #endif |