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-rw-r--r--mm/slab.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/mm/slab.c b/mm/slab.c
index cceb347a354..1a7a10de2a4 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -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