Patch "mm: vmscan: reclaim highmem zone if buffer_heads is over limit" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

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

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mm-vmscan-reclaim-highmem-zone-if-buffer_heads-is-over-limit.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 7bf52fb891b64b8d61caf0b82060adb9db761aec Mon Sep 17 00:00:00 2001
From: Minchan Kim <minchan@kernel.org>
Date: Thu, 28 Apr 2016 16:18:38 -0700
Subject: mm: vmscan: reclaim highmem zone if buffer_heads is over limit

From: Minchan Kim <minchan@kernel.org>

commit 7bf52fb891b64b8d61caf0b82060adb9db761aec upstream.

We have been reclaimed highmem zone if buffer_heads is over limit but
commit 6b4f7799c6a5 ("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: 6b4f7799c6a5 ("mm: vmscan: invoke slab shrinkers from shrink_zone()")
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.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
@@ -2534,7 +2534,7 @@ static bool shrink_zones(struct zonelist
 		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))


Patches currently in stable-queue which might be from minchan@kernel.org are

queue-4.4/mm-vmscan-reclaim-highmem-zone-if-buffer_heads-is-over-limit.patch
queue-4.4/mm-hwpoison-fix-wrong-num_poisoned_pages-accounting.patch