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. Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Ingo Molnar <[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]> --- kernel/watchdog.c | 8 -------- 1 files changed, 0 insertions(+), 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(); } -- 1.7.5.4 -- 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/
