linux-kernel - [PATCH 4/9] mm: remove unnecessary reclaimability check from NUMA balancing target

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Message-Id: <20170228214007.5621-5-hannes@cmpxchg.org>
Date:   Tue, 28 Feb 2017 16:40:02 -0500
From:   Johannes Weiner <hannes@...xchg.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Jia He <hejianet@...il.com>, Michal Hocko <mhocko@...e.cz>,
        Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, kernel-team@...com
Subject: [PATCH 4/9] mm: remove unnecessary reclaimability check from NUMA balancing target

NUMA balancing already checks the watermarks of the target node to
decide whether it's a suitable balancing target. Whether the node is
reclaimable or not is irrelevant when we don't intend to reclaim.

Signed-off-by: Johannes Weiner <hannes@...xchg.org>
---
 mm/migrate.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 2c63ac06791b..45a18be27b1a 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1718,9 +1718,6 @@ static bool migrate_balanced_pgdat(struct pglist_data *pgdat,
 {
 	int z;
 
-	if (!pgdat_reclaimable(pgdat))
-		return false;
-
 	for (z = pgdat->nr_zones - 1; z >= 0; z--) {
 		struct zone *zone = pgdat->node_zones + z;
 
-- 
2.11.1