diff options
| author | Ingo Molnar | 2005-09-07 00:16:27 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2005-09-08 01:57:17 +0200 |
| commit | 8446f1d391f3d27e6bf9c43d4cbcdac0ca720417 (patch) | |
| tree | 738853af877c9a391b4f2db467e7f90c6e2e38ed /arch/i386/kernel/time.c | |
| parent | [PATCH] FUTEX_WAKE_OP: pthread_cond_signal() speedup (diff) | |
| download | kernel-qcow2-linux-8446f1d391f3d27e6bf9c43d4cbcdac0ca720417.tar.gz kernel-qcow2-linux-8446f1d391f3d27e6bf9c43d4cbcdac0ca720417.tar.xz kernel-qcow2-linux-8446f1d391f3d27e6bf9c43d4cbcdac0ca720417.zip | |
[PATCH] detect soft lockups
This patch adds a new kernel debug feature: CONFIG_DETECT_SOFTLOCKUP.
When enabled then per-CPU watchdog threads are started, which try to run
once per second. If they get delayed for more than 10 seconds then a
callback from the timer interrupt detects this condition and prints out a
warning message and a stack dump (once per lockup incident). The feature
is otherwise non-intrusive, it doesnt try to unlock the box in any way, it
only gets the debug info out, automatically, and on all CPUs affected by
the lockup.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-Off-By: Matthias Urlichs <smurf@smurf.noris.de>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/time.c')
| -rw-r--r-- | arch/i386/kernel/time.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/i386/kernel/time.c b/arch/i386/kernel/time.c index 6f794a78ee1e..b0c5ee2b3446 100644 --- a/arch/i386/kernel/time.c +++ b/arch/i386/kernel/time.c @@ -422,6 +422,7 @@ static int timer_resume(struct sys_device *dev) last_timer->resume(); cur_timer = last_timer; last_timer = NULL; + touch_softlockup_watchdog(); return 0; } |