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| author | Thomas Gleixner <tglx@linutronix.de> | 2007-11-28 15:52:56 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-11-28 15:52:56 +0100 |
| commit | d3938204468dccae16be0099a2abf53db4ed0505 (patch) | |
| tree | c38797ab6c6f0ef19e1da713da2c079c691affc7 /kernel/time/tick-sched.c | |
| parent | a531a141089714efe39eca89593524fdf05104f2 (diff) | |
| download | op-kernel-dev-d3938204468dccae16be0099a2abf53db4ed0505.zip op-kernel-dev-d3938204468dccae16be0099a2abf53db4ed0505.tar.gz | |
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 <davem@davemloft.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/time/tick-sched.c')
| -rw-r--r-- | kernel/time/tick-sched.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 27a2338..cb89fa8 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(); |
