Apply memory policies to top two highest zones when highest zone is ZONE_MOVABLE

[sfrench/cifs-2.6.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 3da85b81dabb32608fa065f8086de64f725f5af8..6427653023aabfb501a2c34d3cc18f39b686c532 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1157,6 +1157,7 @@ get_page_from_freelist(gfp_t gfp_mask, unsigned int order,
        nodemask_t *allowednodes = NULL;/* zonelist_cache approximation */
        int zlc_active = 0;             /* set if using zonelist_cache */
        int did_zlc_setup = 0;          /* just call zlc_setup() one time */
+       enum zone_type highest_zoneidx = -1; /* Gets set for policy zonelists */
 
 zonelist_scan:
        /*
@@ -1166,6 +1167,18 @@ zonelist_scan:
        z = zonelist->zones;
 
        do {
+               /*
+                * In NUMA, this could be a policy zonelist which contains
+                * zones that may not be allowed by the current gfp_mask.
+                * Check the zone is allowed by the current flags
+                */
+               if (unlikely(alloc_should_filter_zonelist(zonelist))) {
+                       if (highest_zoneidx == -1)
+                               highest_zoneidx = gfp_zone(gfp_mask);
+                       if (zone_idx(*z) > highest_zoneidx)
+                               continue;
+               }
+
                if (NUMA_BUILD && zlc_active &&
                        !zlc_zone_worth_trying(zonelist, z, allowednodes))
                                continue;