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slub: improve kmem_cache_destroy() error message

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As pointed out by Ingo, the SLUB warning of calling kmem_cache_destroy()
with cache that still has objects triggers in practice. So turn this
WARN_ON() into a nice SLUB specific error message to avoid people
confusing it to a SLUB bug.

Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
This commit is contained in:
Pekka Enberg 2008-04-23 22:31:08 +03:00
parent 0701a9e649
commit d629d81957
1 changed files with 5 additions and 2 deletions
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7
mm/slub.c
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@ -2426,8 +2426,11 @@ void kmem_cache_destroy(struct kmem_cache *s)
if (!s->refcount) { if (!s->refcount) {
list_del(&s->list); list_del(&s->list);
up_write(&slub_lock); up_write(&slub_lock);
if (kmem_cache_close(s)) if (kmem_cache_close(s)) {
WARN_ON(1); printk(KERN_ERR "SLUB %s: %s called for cache that "
"still has objects.\n", s->name, __func__);
dump_stack();
}
sysfs_slab_remove(s); sysfs_slab_remove(s);
} else } else
up_write(&slub_lock); up_write(&slub_lock);