[PATCH] update sc->nr_reclaimed after each shrink_slab

From	Zhou Chengming <zhouchengming1@huawei.com>
Newsgroups	linux.kernel
Subject	[PATCH] update sc->nr_reclaimed after each shrink_slab
Date	2016-07-22 05:50 +0200
Message-ID	<rXzDj-hE-5@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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In !global_reclaim(sc) case, we should update sc->nr_reclaimed after each
shrink_slab in the loop. Because we need the correct sc->nr_reclaimed
value to see if we can break out.

Signed-off-by: Zhou Chengming <zhouchengming1@huawei.com>
---
 mm/vmscan.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index c4a2f45..47133c3 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2405,6 +2405,11 @@ static bool shrink_zone(struct zone *zone, struct scan_control *sc,
 					    memcg, sc->nr_scanned - scanned,
 					    lru_pages);
 
+			if (!global_reclaim(sc) && reclaim_state) {
+				sc->nr_reclaimed += reclaim_state->reclaimed_slab;
+				reclaim_state->reclaimed_slab = 0;
+			}
+
 			/* Record the group's reclaim efficiency */
 			vmpressure(sc->gfp_mask, memcg, false,
 				   sc->nr_scanned - scanned,
-- 
1.7.7

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[PATCH] update sc->nr_reclaimed after each shrink_slab Zhou Chengming <zhouchengming1@huawei.com> - 2016-07-22 05:50 +0200
  Re: [PATCH] update sc->nr_reclaimed after each shrink_slab Michal Hocko <mhocko@kernel.org> - 2016-07-22 09:50 +0200
    Re: [PATCH] update sc->nr_reclaimed after each shrink_slab Michal Hocko <mhocko@kernel.org> - 2016-07-22 10:20 +0200

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