[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>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b7f14a4..a5c3f8b 100644 (file)
--- 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));
 
        /*