+ mm-vmscan-reclaim-only-affects-managed_zones.patch added to -mm tree

+ mm-vmscan-reclaim-only-affects-managed_zones.patch added to -mm tree

[Andrew Morton]

The patch titled
     Subject: mm/vmscan: reclaim only affects managed_zones
has been added to the -mm tree.  Its filename is
     mm-vmscan-reclaim-only-affects-managed_zones.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-vmscan-reclaim-only-affects-managed_zones.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmscan-reclaim-only-affects-managed_zones.patch

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------------------------------------------------------
From: Wei Yang <richard.weiyang@gmail.com>
Subject: mm/vmscan: reclaim only affects managed_zones

As mentioned in commit 6aa303defb74 ("mm, vmscan: only allocate and
reclaim from zones with pages managed by the buddy allocator") , reclaim
only affects managed_zones.

Let's adjust the code and comment accordingly.

Link: https://lkml.kernel.org/r/20220327024101.10378-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmscan.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/vmscan.c~mm-vmscan-reclaim-only-affects-managed_zones
+++ a/mm/vmscan.c
@@ -1031,7 +1031,7 @@ static bool skip_throttle_noprogress(pg_
 	for (i = 0; i < MAX_NR_ZONES; i++) {
 		struct zone *zone = pgdat->node_zones + i;
 
-		if (!populated_zone(zone))
+		if (!managed_zone(zone))
 			continue;
 
 		reclaimable += zone_reclaimable_pages(zone);
@@ -3912,7 +3912,7 @@ static bool pgdat_balanced(pg_data_t *pg
 	}
 
 	/*
-	 * If a node has no populated zone within highest_zoneidx, it does not
+	 * If a node has no managed zone within highest_zoneidx, it does not
 	 * need balancing by definition. This can happen if a zone-restricted
 	 * allocation tries to wake a remote kswapd.
 	 */
_

Patches currently in -mm which might be from richard.weiyang@gmail.com are

mm-page_alloc-add-same-penalty-is-enough-to-get-round-robin-order.patch
mm-page_alloc-add-penalty-to-local_node.patch
mm-vmscan-reclaim-only-affects-managed_zones.patch
mm-vmscan-make-sure-wakeup_kswapd-with-managed-zone.patch