1 files changed, 7 insertions, 2 deletions

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 8760a4abfa1f..9e2ef3624d77 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1592,6 +1592,11 @@ module_init(kswapd_init)
  */
 int zone_reclaim_mode __read_mostly;
 
+#define RECLAIM_OFF 0
+#define RECLAIM_ZONE (1<<0)     /* Run shrink_cache on the zone */
+#define RECLAIM_WRITE (1<<1)    /* Writeout pages during reclaim */
+#define RECLAIM_SWAP (1<<2)     /* Swap pages out during reclaim */
+
 /*
  * Mininum time between zone reclaim scans
  */
@@ -1630,8 +1635,8 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
         if (!cpus_empty(mask) && node_id != numa_node_id())
                 return 0;
 
-        sc.may_writepage = 0;
-        sc.may_swap = 0;
+        sc.may_writepage = !!(zone_reclaim_mode & RECLAIM_WRITE);
+        sc.may_swap = !!(zone_reclaim_mode & RECLAIM_SWAP);
         sc.nr_scanned = 0;
         sc.nr_reclaimed = 0;
         sc.priority = ZONE_RECLAIM_PRIORITY + 1;