From 0b1303fcf23678ee1785841fb0c770a35cd0833c Mon Sep 17 00:00:00 2001
From: Christoph Lameter <clameter@engr.sgi.com>
Date: Fri, 24 Mar 2006 03:15:59 -0800
Subject: [PATCH] cpusets: only wakeup kswapd for zones in the current cpuset

If we get under some memory pressure in a cpuset (we only scan zones that
are in the cpuset for memory) then kswapd is woken up for all zones.  This
patch only wakes up kswapd in zones that are part of the current cpuset.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 mm/page_alloc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b7f14a4799a5..a5c3f8bd98ae 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -943,7 +943,8 @@ restart:
 		goto got_pg;
 
 	do {
-		wakeup_kswapd(*z, order);
+		if (cpuset_zone_allowed(*z, gfp_mask))
+			wakeup_kswapd(*z, order);
 	} while (*(++z));
 
 	/*
-- 
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