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authorMel Gorman <mel@csn.ul.ie>2009-06-16 15:31:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-16 19:47:32 -0700
commit7f82af9742a9346794ecc1515139daed480e7025 (patch)
tree4928b804c990263d1319d32fa61570fa34a25eb6 /mm
parent6484eb3e2a81807722c5f28efef94d8338b7b996 (diff)
downloadop-kernel-dev-7f82af9742a9346794ecc1515139daed480e7025.zip
op-kernel-dev-7f82af9742a9346794ecc1515139daed480e7025.tar.gz
page allocator: check only once if the zonelist is suitable for the allocation
It is possible with __GFP_THISNODE that no zones are suitable. This patch makes sure the check is only made once. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/page_alloc.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index bfbd95c..6be8fcb 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1483,9 +1483,8 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order,
if (should_fail_alloc_page(gfp_mask, order))
return NULL;
-restart:
- z = zonelist->_zonerefs; /* the list of zones suitable for gfp_mask */
-
+ /* the list of zones suitable for gfp_mask */
+ z = zonelist->_zonerefs;
if (unlikely(!z->zone)) {
/*
* Happens if we have an empty zonelist as a result of
@@ -1494,6 +1493,7 @@ restart:
return NULL;
}
+restart:
page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, nodemask, order,
zonelist, high_zoneidx, ALLOC_WMARK_LOW|ALLOC_CPUSET);
if (page)
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