The first kmem_cache created at booting up is supposed neither mergeable nor destroyable but was possible to destroy. So prevent it. Signed-off-by: Kyunghwan Kwon <kwon@xxxxxxxxxxxx> --- mm/slab_common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/slab_common.c b/mm/slab_common.c index 1dfc209..2d30ace 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -744,7 +744,7 @@ void kmem_cache_destroy(struct kmem_cache *s) bool need_rcu_barrier = false; int err; - if (unlikely(!s)) + if (unlikely(!s) || s->refcount == -1) return; get_online_cpus(); -- 2.9.3 (Apple Git-75) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>