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-rw-r--r--mm/slab.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 807d86c76908..1880d482a0cb 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3879,7 +3879,12 @@ static int __do_tune_cpucache(struct kmem_cache *cachep, int limit,
prev = cachep->cpu_cache;
cachep->cpu_cache = cpu_cache;
- kick_all_cpus_sync();
+ /*
+ * Without a previous cpu_cache there's no need to synchronize remote
+ * cpus, so skip the IPIs.
+ */
+ if (prev)
+ kick_all_cpus_sync();
check_irq_on();
cachep->batchcount = batchcount;