mm: fix deferred congestion timeout if preferred zone is not allowed

[mv-sheeva.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 90c1439549fdf221ab1813b14ae0d5dc74adce45..f4967910c967aee5e3dab3c923255c0a55ff3c41 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2034,6 +2034,14 @@ restart:
         */
        alloc_flags = gfp_to_alloc_flags(gfp_mask);
 
+       /*
+        * Find the true preferred zone if the allocation is unconstrained by
+        * cpusets.
+        */
+       if (!(alloc_flags & ALLOC_CPUSET) && !nodemask)
+               first_zones_zonelist(zonelist, high_zoneidx, NULL,
+                                       &preferred_zone);
+
        /* This is the last chance, in general, before the goto nopage. */
        page = get_page_from_freelist(gfp_mask, nodemask, order, zonelist,
                        high_zoneidx, alloc_flags & ~ALLOC_NO_WATERMARKS,
@@ -2192,7 +2200,9 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order,
 
        get_mems_allowed();
        /* The preferred zone is used for statistics later */
-       first_zones_zonelist(zonelist, high_zoneidx, nodemask, &preferred_zone);
+       first_zones_zonelist(zonelist, high_zoneidx,
+                               nodemask ? : &cpuset_current_mems_allowed,
+                               &preferred_zone);
        if (!preferred_zone) {
                put_mems_allowed();
                return NULL;