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| author | Mandeep Singh Baines <msb@google.com> | 2009-01-15 11:08:40 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-16 14:06:04 +0100 |
| commit | e162b39a368f0401e41b558f430c354d12a85b37 (patch) | |
| tree | 3fb7e4d48f398d62e5074e7e3dd183cc54f59820 /kernel/sysctl.c | |
| parent | c903ff837909ccada51243307d4239f86af40179 (diff) | |
| download | lwn-e162b39a368f0401e41b558f430c354d12a85b37.tar.gz lwn-e162b39a368f0401e41b558f430c354d12a85b37.zip | |
softlockup: decouple hung tasks check from softlockup detection
Decoupling allows:
* hung tasks check to happen at very low priority
* hung tasks check and softlockup to be enabled/disabled independently
at compile and/or run-time
* individual panic settings to be enabled disabled independently
at compile and/or run-time
* softlockup threshold to be reduced without increasing hung tasks
poll frequency (hung task check is expensive relative to softlock watchdog)
* hung task check to be zero over-head when disabled at run-time
Signed-off-by: Mandeep Singh Baines <msb@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sysctl.c')
| -rw-r--r-- | kernel/sysctl.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 596dc31a7116..2481ed30d2b5 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -805,6 +805,19 @@ static struct ctl_table kern_table[] = { .extra1 = &neg_one, .extra2 = &sixty, }, +#endif +#ifdef CONFIG_DETECT_HUNG_TASK + { + .ctl_name = CTL_UNNUMBERED, + .procname = "hung_task_panic", + .data = &sysctl_hung_task_panic, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dointvec_minmax, + .strategy = &sysctl_intvec, + .extra1 = &zero, + .extra2 = &one, + }, { .ctl_name = CTL_UNNUMBERED, .procname = "hung_task_check_count", @@ -820,7 +833,7 @@ static struct ctl_table kern_table[] = { .data = &sysctl_hung_task_timeout_secs, .maxlen = sizeof(unsigned long), .mode = 0644, - .proc_handler = &proc_doulongvec_minmax, + .proc_handler = &proc_dohung_task_timeout_secs, .strategy = &sysctl_intvec, }, { |