Messages in this thread | | | Date | Fri, 03 Oct 2003 16:32:49 -0500 | From | Steve Modica <> | Subject | Re: simple mod_timer patch |
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Forgot to mention.. please leave me on the CC list. Thanks! Steve
Steve Modica wrote: > I pulled this back from the 2.6 kernel to reduce some serious contention > on the timerlist_lock when I had 8 gigabit cards runnings. > > > diff -u -r1.23 -r1.24 > --- linux/linux/kernel/timer.c 2003/08/11 20:16:19 1.23 > +++ linux/linux/kernel/timer.c 2003/10/01 21:09:20 1.24 > @@ -207,6 +207,14 @@ > int ret; > unsigned long flags; > > + /* > + * This is a common optimization triggered by the > + * networking code - if the timer is re-modified > + * to be the same thing then just return: > + */ > + if (timer->expires == expires && timer_pending(timer)) > + return 1; > + > spin_lock_irqsave(&timerlist_lock, flags); > timer->expires = expires; > ret = detach_timer(timer); > > >
-- Steve Modica work: 651-683-3224 MTS-Technical Lead "Give a man a fish, and he will eat for a day, hit him with a fish and he leaves you alone" - me
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