The patch titled
slab: remove broken PageSlab check from kfree_debugcheck
has been added to the -mm tree. Its filename is
slab-remove-broken-pageslab-check-from-kfree_debugcheck.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: slab: remove broken PageSlab check from kfree_debugcheck
From: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
The PageSlab debug check in kfree_debugcheck() is broken for compound
pages. It is also redundant as we already do BUG_ON for non-slab pages in
page_get_cache() and page_get_slab() which are always called before we free
any actual objects.
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/slab.c | 8 --------
1 files changed, 8 deletions(-)
diff -puN mm/slab.c~slab-remove-broken-pageslab-check-from-kfree_debugcheck mm/slab.c
--- a/mm/slab.c~slab-remove-broken-pageslab-check-from-kfree_debugcheck
+++ a/mm/slab.c
@@ -2814,19 +2814,11 @@ failed:
*/
static void kfree_debugcheck(const void *objp)
{
- struct page *page;
-
if (!virt_addr_valid(objp)) {
printk(KERN_ERR "kfree_debugcheck: out of range ptr %lxh.\n",
(unsigned long)objp);
BUG();
}
- page = virt_to_page(objp);
- if (!PageSlab(page)) {
- printk(KERN_ERR "kfree_debugcheck: bad ptr %lxh.\n",
- (unsigned long)objp);
- BUG();
- }
}
static inline void verify_redzone_free(struct kmem_cache *cache, void *obj)
_
Patches currently in -mm which might be from penberg@xxxxxxxxxxxxxx are
slab-remove-broken-pageslab-check-from-kfree_debugcheck.patch
slab-leaks3-default-y.patch
-
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