slab: do not panic if we fail to create memcg cache

[~andy/linux] / mm / slab_common.c

diff --git a/mm/slab_common.c b/mm/slab_common.c
index f34707eeacc7b533a958a44a97e01ab0a9dc5f1e..8e40321da091b66f24f983b266acb344ce41d56c 100644 (file)
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -233,7 +233,14 @@ out_unlock:
        mutex_unlock(&slab_mutex);
        put_online_cpus();
 
-       if (err) {
+       /*
+        * There is no point in flooding logs with warnings or especially
+        * crashing the system if we fail to create a cache for a memcg. In
+        * this case we will be accounting the memcg allocation to the root
+        * cgroup until we succeed to create its own cache, but it isn't that
+        * critical.
+        */
+       if (err && !memcg) {
                if (flags & SLAB_PANIC)
                        panic("kmem_cache_create: Failed to create slab '%s'. Error %d\n",
                                name, err);