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authorWeijie Yang <weijie.yang@samsung.com>2014-10-09 15:28:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-09 22:25:57 -0400
commit7ade3c997208566c5bf50ece8fc319a8caf0d41a (patch)
tree9932f6503a63a7283c03c281e921502f3ba0b589 /mm
parent81d1b09c6be66afac7d41ee52279d9bccbce56d8 (diff)
mm: page_alloc: avoid wakeup kswapd on the unintended node
When entering the page_alloc slowpath, we wakeup kswapd on every pgdat according to the zonelist and high_zoneidx. However, this doesn't take nodemask into account, and could prematurely wakeup kswapd on some unintended nodes. This patch uses for_each_zone_zonelist_nodemask() instead of for_each_zone_zonelist() in wake_all_kswapds() to avoid the above situation. Signed-off-by: Weijie Yang <weijie.yang@samsung.com> Acked-by: Mel Gorman <mgorman@suse.de> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Rik van Riel <riel@redhat.com> Cc: David Rientjes <rientjes@google.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.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 3a950144f80b..ae2f8474273c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2471,12 +2471,14 @@ __alloc_pages_high_priority(gfp_t gfp_mask, unsigned int order,
static void wake_all_kswapds(unsigned int order,
struct zonelist *zonelist,
enum zone_type high_zoneidx,
- struct zone *preferred_zone)
+ struct zone *preferred_zone,
+ nodemask_t *nodemask)
{
struct zoneref *z;
struct zone *zone;
- for_each_zone_zonelist(zone, z, zonelist, high_zoneidx)
+ for_each_zone_zonelist_nodemask(zone, z, zonelist,
+ high_zoneidx, nodemask)
wakeup_kswapd(zone, order, zone_idx(preferred_zone));
}
@@ -2574,7 +2576,8 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order,
restart:
if (!(gfp_mask & __GFP_NO_KSWAPD))
- wake_all_kswapds(order, zonelist, high_zoneidx, preferred_zone);
+ wake_all_kswapds(order, zonelist, high_zoneidx,
+ preferred_zone, nodemask);
/*
* OK, we're below the kswapd watermark and have kicked background

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