From d3938204468dccae16be0099a2abf53db4ed0505 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 28 Nov 2007 15:52:56 +0100 Subject: [PATCH] softlockup: fix false positives on CONFIG_NOHZ David Miller reported soft lockup false-positives that trigger on NOHZ due to CPUs idling for more than 10 seconds. The solution is touch the softlockup watchdog when we return from idle. (by definition we are not 'locked up' when we were idle) http://bugzilla.kernel.org/show_bug.cgi?id=9409 Reported-by: David Miller Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- kernel/time/tick-sched.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 27a2338deb4a..cb89fa8db110 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -133,6 +133,8 @@ void tick_nohz_update_jiffies(void) if (!ts->tick_stopped) return; + touch_softlockup_watchdog(); + cpu_clear(cpu, nohz_cpu_mask); now = ktime_get(); -- 2.20.1