metag: Remove duplicate KERN_<LEVEL> prefix

[cascardo/linux.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 62d1ea3..6903b69 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3604,6 +3604,17 @@ retry:
         */
        alloc_flags = gfp_to_alloc_flags(gfp_mask);
 
+       /*
+        * Reset the zonelist iterators if memory policies can be ignored.
+        * These allocations are high priority and system rather than user
+        * orientated.
+        */
+       if ((alloc_flags & ALLOC_NO_WATERMARKS) || !(alloc_flags & ALLOC_CPUSET)) {
+               ac->zonelist = node_zonelist(numa_node_id(), gfp_mask);
+               ac->preferred_zoneref = first_zones_zonelist(ac->zonelist,
+                                       ac->high_zoneidx, ac->nodemask);
+       }
+
        /* This is the last chance, in general, before the goto nopage. */
        page = get_page_from_freelist(gfp_mask, order,
                                alloc_flags & ~ALLOC_NO_WATERMARKS, ac);
@@ -3612,12 +3623,6 @@ retry:
 
        /* Allocate without watermarks if the context allows */
        if (alloc_flags & ALLOC_NO_WATERMARKS) {
-               /*
-                * Ignore mempolicies if ALLOC_NO_WATERMARKS on the grounds
-                * the allocation is high priority and these type of
-                * allocations are system rather than user orientated
-                */
-               ac->zonelist = node_zonelist(numa_node_id(), gfp_mask);
                page = get_page_from_freelist(gfp_mask, order,
                                                ALLOC_NO_WATERMARKS, ac);
                if (page)
@@ -3816,7 +3821,11 @@ retry_cpuset:
        /* Dirty zone balancing only done in the fast path */
        ac.spread_dirty_pages = (gfp_mask & __GFP_WRITE);
 
-       /* The preferred zone is used for statistics later */
+       /*
+        * The preferred zone is used for statistics but crucially it is
+        * also used as the starting point for the zonelist iterator. It
+        * may get reset for allocations that ignore memory policies.
+        */
        ac.preferred_zoneref = first_zones_zonelist(ac.zonelist,
                                        ac.high_zoneidx, ac.nodemask);
        if (!ac.preferred_zoneref) {