Add additional debugging to check that the objects is actually from the cache
the caller claims. Doing so currently trips up some other debugging code. It
takes a lot to infer from that what was happening.
V2: Only warn once.
Signed-off-by: Christoph Lameter <cl@xxxxxxxxx>
Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c 2012-08-03 14:16:27.396663869 -0500
+++ linux-2.6/mm/slub.c 2012-08-03 14:16:38.664866880 -0500
@@ -2607,6 +2607,13 @@ void kmem_cache_free(struct kmem_cache *
page = virt_to_head_page(x);
+ if (kmem_cache_debug(s) && page->slab != s) {
+ printk("kmem_cache_free: Wrong slab cache. %s but object"
+ " is from %s\n", page->slab->name, s->name);
+ WARN_ON_ONCE(1);
+ return;
+ }
+
slab_free(s, page, x, _RET_IP_);
trace_kmem_cache_free(_RET_IP_, x);
--
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