From: Christoph Lameter <clameter@engr.sgi.com>

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>
---

 mm/page_alloc.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)

diff -puN mm/page_alloc.c~cpusets-only-wakeup-kswapd-for-zones-in-the-current-cpuset mm/page_alloc.c
--- devel/mm/page_alloc.c~cpusets-only-wakeup-kswapd-for-zones-in-the-current-cpuset	2006-02-23 19:41:19.000000000 -0800
+++ devel-akpm/mm/page_alloc.c	2006-02-23 19:41:19.000000000 -0800
@@ -939,7 +939,8 @@ restart:
 		goto got_pg;
 
 	do {
-		wakeup_kswapd(*z, order);
+		if (cpuset_zone_allowed(*z, gfp_mask))
+			wakeup_kswapd(*z, order);
 	} while (*(++z));
 
 	/*
_