On Mon, 2007-05-21 at 14:57 -0700, Andrew Morton wrote:
> On Mon, 21 May 2007 21:58:55 +0200
> Thomas Gleixner <[email protected]> wrote:
>
> > 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 <[email protected]>
> >
> > Index: linux-2.6.21/kernel/time/tick-sched.c
> > ===================================================================
> > --- linux-2.6.21.orig/kernel/time/tick-sched.c
> > +++ linux-2.6.21/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++;
> > + }
> > + }
>
> that's not a "rate" limit. I resist the temptation to rename it to "limit"
> to keep mainline and -stable in sync, and coz it's temporary (we hope).
Point taken.
tglx
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