]> err.no Git - linux-2.6/commit
SLUB: accurately compare debug flags during slab cache merge
authorChristoph Lameter <clameter@sgi.com>
Tue, 11 Sep 2007 22:24:11 +0000 (15:24 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Wed, 12 Sep 2007 00:21:27 +0000 (17:21 -0700)
commitba0268a8b056f2ad846f1f8837a764c21bb6425e
tree93ab7d2555a98628850dbf917a43ceddef8c980c
parent4150d3f549fe2355625017b2a6ff72aec98bcef0
SLUB: accurately compare debug flags during slab cache merge

This was posted on Aug 28 and fixes an issue that could cause troubles
when slab caches >=128k are created.

http://marc.info/?l=linux-mm&m=118798149918424&w=2

Currently we simply add the debug flags unconditional when checking for a
matching slab.  This creates issues for sysfs processing when slabs exist
that are exempt from debugging due to their huge size or because only a
subset of slabs was selected for debugging.

We need to only add the flags if kmem_cache_open() would also add them.

Create a function to calculate the flags that would be set
if the cache would be opened and use that function to determine
the flags before looking for a compatible slab.

[akpm@linux-foundation.org: fixlets]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/slub.c