Imported linux-2.6.27.39 suse/xen patches.

[ipfire-2.x.git] / src / patches / suse-2.6.27.39 / patches.fixes / slab-alloc_slabmgmt-fix.patch

From: Pekka Enberg <penberg@cs.helsinki.fi>
Date: Tue, 25 Nov 2008 00:33:28 +0200
Subject: slab: remove GFP_THISNODE clearing from alloc_slabmgmt()
Patch-mainline: 2.6.28?
References: bnc#444597

Commit 6cb062296f73e74768cca2f3eaf90deac54de02d ("Categorize GFP flags")
left one call-site in alloc_slabmgmt() to clear GFP_THISNODE instead of
GFP_CONSTRAINT_MASK. Unfortunately, that ends up clearing __GFP_NOWARN
and __GFP_NORETRY as well which is not what we want. As the only caller
of alloc_slabmgmt() already clears GFP_CONSTRAINT_MASK before passing
local_flags to it, we can just remove the clearing of GFP_THISNODE.

This patch should fix spurious page allocation failure warnings on the
mempool_alloc() path. See the following URL for an example:

  http://lkml.org/lkml/2008/10/27/100

Reported-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Miklos Szeredi <mszeredi@suse.cz>
---
 mm/slab.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index 918f04f..98d3024 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2608,7 +2608,7 @@ static struct slab *alloc_slabmgmt(struct kmem_cache *cachep, void *objp,
 	if (OFF_SLAB(cachep)) {
 		/* Slab management obj is off-slab. */
 		slabp = kmem_cache_alloc_node(cachep->slabp_cache,
-					      local_flags & ~GFP_THISNODE, nodeid);
+					      local_flags, nodeid);
 		if (!slabp)
 			return NULL;
 	} else {