path: root/fs
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authorIngo Molnar <mingo@elte.hu>2005-09-06 15:16:27 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-07 16:57:17 -0700
commit8446f1d391f3d27e6bf9c43d4cbcdac0ca720417 (patch)
tree738853af877c9a391b4f2db467e7f90c6e2e38ed /fs
parent[PATCH] FUTEX_WAKE_OP: pthread_cond_signal() speedup (diff)
[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 'fs')
0 files changed, 0 insertions, 0 deletions