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authorAndrew Morton <akpm@linux-foundation.org>2013-09-24 15:27:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-24 17:00:25 -0700
commit20ba27f52eded4d14e309ac57971c9c83dec46e4 (patch)
tree6812074184e7f9f287be5bbeb15da593f0404925 /mm
parent99d7a8824a15cb6da046947e9b5a2335d52fbeb7 (diff)
downloadlinux-stericsson-20ba27f52eded4d14e309ac57971c9c83dec46e4.tar.gz
revert "memcg, vmscan: do not fall into reclaim-all pass too quickly"
Revert commit e975de998b96 ("memcg, vmscan: do not fall into reclaim-all pass too quickly") I merged this prematurely - Michal and Johannes still disagree about the overall design direction and the future remains unclear. Cc: Michal Hocko <mhocko@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/vmscan.c19
1 files changed, 2 insertions, 17 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 8ed1b775bdc9..97b0ed16749f 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2176,11 +2176,10 @@ static inline bool should_continue_reclaim(struct zone *zone,
}
}
-static int
+static void
__shrink_zone(struct zone *zone, struct scan_control *sc, bool soft_reclaim)
{
unsigned long nr_reclaimed, nr_scanned;
- int groups_scanned = 0;
do {
struct mem_cgroup *root = sc->target_mem_cgroup;
@@ -2198,7 +2197,6 @@ __shrink_zone(struct zone *zone, struct scan_control *sc, bool soft_reclaim)
while ((memcg = mem_cgroup_iter_cond(root, memcg, &reclaim, filter))) {
struct lruvec *lruvec;
- groups_scanned++;
lruvec = mem_cgroup_zone_lruvec(zone, memcg);
shrink_lruvec(lruvec, sc);
@@ -2226,8 +2224,6 @@ __shrink_zone(struct zone *zone, struct scan_control *sc, bool soft_reclaim)
} while (should_continue_reclaim(zone, sc->nr_reclaimed - nr_reclaimed,
sc->nr_scanned - nr_scanned, sc));
-
- return groups_scanned;
}
@@ -2235,19 +2231,8 @@ static void shrink_zone(struct zone *zone, struct scan_control *sc)
{
bool do_soft_reclaim = mem_cgroup_should_soft_reclaim(sc);
unsigned long nr_scanned = sc->nr_scanned;
- int scanned_groups;
- scanned_groups = __shrink_zone(zone, sc, do_soft_reclaim);
- /*
- * memcg iterator might race with other reclaimer or start from
- * a incomplete tree walk so the tree walk in __shrink_zone
- * might have missed groups that are above the soft limit. Try
- * another loop to catch up with others. Do it just once to
- * prevent from reclaim latencies when other reclaimers always
- * preempt this one.
- */
- if (do_soft_reclaim && !scanned_groups)
- __shrink_zone(zone, sc, do_soft_reclaim);
+ __shrink_zone(zone, sc, do_soft_reclaim);
/*
* No group is over the soft limit or those that are do not have