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| author | Thomas Gleixner <tglx@linutronix.de> | 2007-05-23 13:57:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-23 20:14:11 -0700 |
| commit | 352823160613b65fdaa558be486720a71f75ed86 (patch) | |
| tree | 772f0aa4c31c26f3c762baae41a288b72ce7dee7 /kernel | |
| parent | 43d4f961a87509b4ea5c1d6f02751aef360a632f (diff) | |
| download | lwn-352823160613b65fdaa558be486720a71f75ed86.tar.gz lwn-352823160613b65fdaa558be486720a71f75ed86.zip | |
NOHZ: Rate limit the local softirq pending warning output
The warning in the NOHZ code, which triggers when a CPU goes idle with
softirqs pending can fill up the logs quite quickly. Rate limit the output
until we found the root cause of that problem.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/tick-sched.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 3483e6cb9549..3e7ebc4646b7 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -167,9 +167,15 @@ void tick_nohz_stop_sched_tick(void) goto end; cpu = smp_processor_id(); - if (unlikely(local_softirq_pending())) - printk(KERN_ERR "NOHZ: local_softirq_pending %02x\n", - local_softirq_pending()); + if (unlikely(local_softirq_pending())) { + static int ratelimit; + + if (ratelimit < 10) { + printk(KERN_ERR "NOHZ: local_softirq_pending %02x\n", + local_softirq_pending()); + ratelimit++; + } + } now = ktime_get(); /* |