[PATCH 4.9 17/70] mm: remove seemingly spurious reclaimability check from laptop_mode gating

Greg Kroah-Hartman
2018-09-17T22:53:17Z

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3301,7 +3301,7 @@ static int balance_pgdat(pg_data_t *pgda
* 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. */