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authorArjan van de Ven <arjan@linux.intel.com>2010-07-19 10:59:42 -0700
committerPekka Enberg <penberg@cs.helsinki.fi>2010-07-20 10:03:23 +0300
commit78b435368fcd615e695a06012cd963a556284e00 (patch)
tree3d844f8a6c4b58f60b6a97510a08d703b455c22e
parent1c5474a65bf15a4cb162dfff86d6d0b5a08a740c (diff)
downloadop-kernel-dev-78b435368fcd615e695a06012cd963a556284e00.zip
op-kernel-dev-78b435368fcd615e695a06012cd963a556284e00.tar.gz
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@linux.intel.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
-rw-r--r--mm/slab.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/slab.c b/mm/slab.c
index e49f8f4..29aad44 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -861,7 +861,7 @@ 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));
}
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