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Commit d3938204 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
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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: default avatarDavid Miller <davem@davemloft.net>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent a531a141

kernel/time/tick-sched.c

+2 −0
Original line number Diff line number Diff line
@@ -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();