Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5830c590 authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds
Browse files

slab: shut down cache_reaper when cpu goes down 



Shutdown the cache_reaper if the cpu is brought down and set the
cache_reap.func to NULL.  Otherwise hotplug shuts down the reaper for good.

Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a4798833

mm/slab.c

+14 −0
Original line number Diff line number Diff line
@@ -1279,6 +1279,20 @@ static int __cpuinit cpuup_callback(struct notifier_block *nfb, 
		start_cpu_timer(cpu);

		break;

#ifdef CONFIG_HOTPLUG_CPU

  	case CPU_DOWN_PREPARE:

		/*

		 * Shutdown cache reaper. Note that the cache_chain_mutex is

		 * held so that if cache_reap() is invoked it cannot do

		 * anything expensive but will only modify reap_work

		 * and reschedule the timer.

		*/

		cancel_rearming_delayed_work(&per_cpu(reap_work, cpu));

		/* Now the cache_reaper is guaranteed to be not running. */

		per_cpu(reap_work, cpu).work.func = NULL;

  		break;

  	case CPU_DOWN_FAILED:

		start_cpu_timer(cpu);

  		break;

	case CPU_DEAD:

		/*

		 * Even if all the cpus of a node are down, we don't free the