diff options
Diffstat (limited to '0002-mm-Abort-reclaim-compaction-if-compaction-can-procee.patch')
| -rw-r--r-- | 0002-mm-Abort-reclaim-compaction-if-compaction-can-procee.patch | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/0002-mm-Abort-reclaim-compaction-if-compaction-can-procee.patch b/0002-mm-Abort-reclaim-compaction-if-compaction-can-procee.patch deleted file mode 100644 index e74b64d91..000000000 --- a/0002-mm-Abort-reclaim-compaction-if-compaction-can-procee.patch +++ /dev/null @@ -1,81 +0,0 @@ -From c01043c9aa51a63bd01c60e53494ca4a7e994542 Mon Sep 17 00:00:00 2001 -From: Mel Gorman <mgorman@suse.de> -Date: Fri, 7 Oct 2011 16:17:23 +0100 -Subject: [PATCH 2/2] mm: Abort reclaim/compaction if compaction can proceed - -If compaction can proceed, shrink_zones() stops doing any work but -the callers still shrink_slab(), raises the priority and potentially -sleeps. This patch aborts direct reclaim/compaction entirely if -compaction can proceed. - -Signed-off-by: Mel Gorman <mgorman@suse.de> ---- - mm/vmscan.c | 20 ++++++++++++++++---- - 1 files changed, 16 insertions(+), 4 deletions(-) - -diff --git a/mm/vmscan.c b/mm/vmscan.c -index 8c03534..b295a38 100644 ---- a/mm/vmscan.c -+++ b/mm/vmscan.c -@@ -2000,14 +2000,19 @@ restart: - * - * If a zone is deemed to be full of pinned pages then just give it a light - * scan then give up on it. -+ * -+ * This function returns true if a zone is being reclaimed for a costly -+ * high-order allocation and compaction is either ready to begin or deferred. -+ * This indicates to the caller that it should retry the allocation or fail. - */ --static void shrink_zones(int priority, struct zonelist *zonelist, -+static bool shrink_zones(int priority, struct zonelist *zonelist, - struct scan_control *sc) - { - struct zoneref *z; - struct zone *zone; - unsigned long nr_soft_reclaimed; - unsigned long nr_soft_scanned; -+ bool should_abort_reclaim = false; - - for_each_zone_zonelist_nodemask(zone, z, zonelist, - gfp_zone(sc->gfp_mask), sc->nodemask) { -@@ -2025,12 +2030,15 @@ static void shrink_zones(int priority, struct zonelist *zonelist, - if (COMPACTION_BUILD) { - /* - * If we already have plenty of memory free -- * for compaction, don't free any more. -+ * for compaction in this zone , don't free any -+ * more. - */ - if (sc->order > PAGE_ALLOC_COSTLY_ORDER && - (compaction_suitable(zone, sc->order) || -- compaction_deferred(zone))) -+ compaction_deferred(zone))) { -+ should_abort_reclaim = true; - continue; -+ } - } - /* - * This steals pages from memory cgroups over softlimit -@@ -2049,6 +2057,8 @@ static void shrink_zones(int priority, struct zonelist *zonelist, - - shrink_zone(priority, zone, sc); - } -+ -+ return should_abort_reclaim; - } - - static bool zone_reclaimable(struct zone *zone) -@@ -2113,7 +2123,9 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist, - sc->nr_scanned = 0; - if (!priority) - disable_swap_token(sc->mem_cgroup); -- shrink_zones(priority, zonelist, sc); -+ if (shrink_zones(priority, zonelist, sc)) -+ break; -+ - /* - * Don't shrink slabs when reclaiming memory from - * over limit cgroups --- -1.7.6.4 - |