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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 | |
| parent | a531a141089714efe39eca89593524fdf05104f2 (diff) | |
| download | linux-d3938204468dccae16be0099a2abf53db4ed0505.tar.gz linux-d3938204468dccae16be0099a2abf53db4ed0505.tar.bz2 linux-d3938204468dccae16be0099a2abf53db4ed0505.zip | |
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>
| -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 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(); |