Commit cb097cd4 authored by Shakeel Butt's avatar Shakeel Butt Committed by Linus Torvalds

slub: don't panic for memcg kmem cache creation failure

Currently for CONFIG_SLUB, if a memcg kmem cache creation is failed and
the corresponding root kmem cache has SLAB_PANIC flag, the kernel will
be crashed.  This is unnecessary as the kernel can handle the creation
failures of memcg kmem caches.  Additionally CONFIG_SLAB does not
implement this behavior.  So, to keep the behavior consistent between
SLAB and SLUB, removing the panic for memcg kmem cache creation
failures.  The root kmem cache creation failure for SLAB_PANIC correctly
panics for both SLAB and SLUB.

Link: http://lkml.kernel.org/r/20190619232514.58994-1-shakeelb@google.comReported-by: default avatarDave Hansen <dave.hansen@intel.com>
Signed-off-by: default avatarShakeel Butt <shakeelb@google.com>
Acked-by: default avatarDavid Rientjes <rientjes@google.com>
Acked-by: default avatarMichal Hocko <mhocko@suse.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Roman Gushchin <guro@fb.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 9cf3a8d8
......@@ -3650,10 +3650,6 @@ static int kmem_cache_open(struct kmem_cache *s, slab_flags_t flags)
free_kmem_cache_nodes(s);
error:
if (flags & SLAB_PANIC)
panic("Cannot create slab %s size=%u realsize=%u order=%u offset=%u flags=%lx\n",
s->name, s->size, s->size,
oo_order(s->oo), s->offset, (unsigned long)flags);
return -EINVAL;
}
......
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