Commit-ID: 93786a5f6aeb9c032c1c240246c5aabcf457b38f Gitweb: http://git.kernel.org/tip/93786a5f6aeb9c032c1c240246c5aabcf457b38f Author: Frederic Weisbecker <[email protected]> AuthorDate: Tue, 23 Jul 2013 02:31:06 +0200 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 30 Jul 2013 22:29:15 +0200
watchdog: Make it work under full dynticks A perf event can be used without forcing the tick to stay alive if it doesn't use a frequency but a sample period and if it doesn't throttle (raise storm of events). Since the lockup detector neither use a perf event frequency nor should ever throttle due to its high period, it can now run concurrently with the full dynticks feature. So remove the hack that disabled the watchdog. Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: Don Zickus <[email protected]> Cc: Srivatsa S. Bhat <[email protected]> Cc: Anish Singh <[email protected]> Signed-off-by: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- kernel/watchdog.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/kernel/watchdog.c b/kernel/watchdog.c index 1241d8c..51c4f34 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -553,14 +553,6 @@ void __init lockup_detector_init(void) { set_sample_period(); -#ifdef CONFIG_NO_HZ_FULL - if (watchdog_user_enabled) { - watchdog_user_enabled = 0; - pr_warning("Disabled lockup detectors by default for full dynticks\n"); - pr_warning("You can reactivate it with 'sysctl -w kernel.watchdog=1'\n"); - } -#endif - if (watchdog_user_enabled) watchdog_enable_all_cpus(); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
