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[for-4.9.y,14/14] mm: remove seemingly spurious reclaimability check from laptop_mode gating

Message ID 1535487205-26280-15-git-send-email-amit.pundir@linaro.org
State New
Headers show
Series Few upstream fixes from OnePlus6's kernel tree | expand

Commit Message

Amit Pundir Aug. 28, 2018, 8:13 p.m. UTC 
From: Johannes Weiner <hannes@cmpxchg.org>


commit 047d72c30eedcb953222810f1e7dcaae663aa452 upstream.

Commit 1d82de618ddd ("mm, vmscan: make kswapd reclaim in terms of
nodes") allowed laptop_mode=1 to start writing not just when the
priority drops to DEF_PRIORITY - 2 but also when the node is
unreclaimable.

That appears to be a spurious change in this patch as I doubt the series
was tested with laptop_mode, and neither is that particular change
mentioned in the changelog.  Remove it, it's still recent.

Link: http://lkml.kernel.org/r/20170228214007.5621-4-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>

Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>

Acked-by: Mel Gorman <mgorman@techsingularity.net>

Acked-by: Michal Hocko <mhocko@suse.com>

Cc: Jia He <hejianet@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>

---
 mm/vmscan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.7.4
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Patch

diff --git a/mm/vmscan.c b/mm/vmscan.c
index cfffef1f26a8..4e5846b8b5eb 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3301,7 +3301,7 @@  static int balance_pgdat(pg_data_t *pgdat, int order, int classzone_idx)
 		 * If we're getting trouble reclaiming, start doing writepage
 		 * even in laptop mode.
 		 */
-		if (sc.priority < DEF_PRIORITY - 2 || !pgdat_reclaimable(pgdat))
+		if (sc.priority < DEF_PRIORITY - 2)
 			sc.may_writepage = 1;
 
 		/* Call soft limit reclaim before calling shrink_node. */