kuznet@ms2.inr.ac.ru wrote:
>
> Hello!
>
> > --- 2.5.25/kernel/timer.c~timer-speedup Tue Jul 9 00:04:33 2002
> > +++ 2.5.25-akpm/kernel/timer.c Tue Jul 9 00:06:09 2002
> > @@ -211,6 +211,9 @@ int mod_timer(struct timer_list *timer,
> > int ret;
> > unsigned long flags;
> >
> > + if (timer_pending(timer) && timer->expires == expires)
> > + return 1;
> > +
> > spin_lock_irqsave(&timerlist_lock, flags);
> > timer->expires = expires;
> > ret = detach_timer(timer);
>
> Does this not lose timer sometimes?
>
Well I've thought about it long and hard, but I can't see a
hole. But there probably is one. Somewhere.
It reduces mod_timer() load by 30% in a netperf run, so it's
worth thinking about.
-
-
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This archive was generated by hypermail 2b29 : Mon Jul 15 2002 - 22:00:16 EST