Commit 7bf52fb8 authored Apr 28, 2016 by Minchan Kim Committed by Linus Torvalds Apr 28, 2016

mm: vmscan: reclaim highmem zone if buffer_heads is over limit



We have been reclaimed highmem zone if buffer_heads is over limit but
commit 6b4f7799 ("mm: vmscan: invoke slab shrinkers from
shrink_zone()") changed the behavior so it doesn't reclaim highmem zone
although buffer_heads is over the limit.  This patch restores the logic.

Fixes: 6b4f7799 ("mm: vmscan: invoke slab shrinkers from shrink_zone()")
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 28093f9f

mm/vmscan.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2553,7 +2553,7 @@ static bool shrink_zones(struct zonelist zonelist, struct scan_control sc)
		sc->gfp_mask \|= __GFP_HIGHMEM;

		for_each_zone_zonelist_nodemask(zone, z, zonelist,
		requested_highidx, sc->nodemask) {
		gfp_zone(sc->gfp_mask), sc->nodemask) {
		enum zone_type classzone_idx;

		if (!populated_zone(zone))

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