commit cce89f4f6911286500cf7be0363f46c9b0a12ce0('Move kmem_cache
refcounting to common code') moves some refcount manipulation code to
common code. Unfortunately, it also removed refcount assignment for
kmalloc_caches. So, kmalloc_caches's refcount is initially 0.
This makes errornous situation.Paul Hargrove report that when he create a 8-byte kmem_cache and destory it, he encounter below message. 'Objects remaining in kmalloc-8 on kmem_cache_close()' 8-byte kmem_cache merge with 8-byte kmalloc cache and refcount is increased by one. So, resulting refcount is 1. When destory it, it hit refcount = 0, then kmem_cache_close() is executed and error message is printed. This patch assign initial refcount 1 to kmalloc_caches, so fix this errornous situtation. Cc: <[email protected]> # v3.7 Cc: Christoph Lameter <[email protected]> Reported-by: Paul Hargrove <[email protected]> Signed-off-by: Joonsoo Kim <[email protected]> diff --git a/mm/slub.c b/mm/slub.c index a0d6984..321afab 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3279,6 +3279,7 @@ static struct kmem_cache *__init create_kmalloc_cache(const char *name, if (kmem_cache_open(s, flags)) goto panic; + s->refcount = 1; list_add(&s->list, &slab_caches); return s; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
