slab: use deferable timers for its periodic housekeeping
in [Kernel]
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From: Pekka Enberg on 20 Jul 2010 03:10 Arjan van de Ven wrote: > From: Arjan van de Ven <arjan(a)linux.intel.com> > Subject: [PATCH] slab: use deferable timers for its periodic housekeeping > > slab has a "once every 2 second" timer for its housekeeping. > As the number of logical processors is growing, its more and more > common that this 2 second timer becomes the primary wakeup source. > > This patch turns this housekeeping timer into a deferable timer, > which means that the timer does not interrupt idle, but just runs > at the next event that wakes the cpu up. > > The impact is that the timer likely runs a bit later, but during the > delay no code is running so there's not all that much reason for > a difference in housekeeping to occur because of this delay. > > Signed-off-by: Arjan van de Ven <arjan(a)linux.intel.com> > --- > mm/slab.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/mm/slab.c b/mm/slab.c > index 7451bda..ef3cd3d 100644 > --- a/mm/slab.c > +++ b/mm/slab.c > @@ -884,7 +884,7 @@ static void __cpuinit start_cpu_timer(int cpu) > */ > if (keventd_up() && reap_work->work.func == NULL) { > init_reap_node(cpu); > - INIT_DELAYED_WORK(reap_work, cache_reap); > + INIT_DELAYED_WORK_DEFERRABLE(reap_work, cache_reap); > schedule_delayed_work_on(cpu, reap_work, > __round_jiffies_relative(HZ, cpu)); > } [ The patch seems to have been whitespace damaged. ] Applied, thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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