linux-kernel - [Patch v2 1/2] mm/vmscan: reclaim only affects managed

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Message-Id: <20220329010901.1654-1-richard.weiyang@gmail.com>
Date:   Tue, 29 Mar 2022 01:09:00 +0000
From:   Wei Yang <richard.weiyang@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        ying.huang@...el.com, mgorman@...hsingularity.net,
        Wei Yang <richard.weiyang@...il.com>
Subject: [Patch v2 1/2] 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.

Signed-off-by: Wei Yang <richard.weiyang@...il.com>
Reviewed-by: Miaohe Lin <linmiaohe@...wei.com>
Reviewed-by: David Hildenbrand <david@...hat.com>
Reviewed-by: Oscar Salvador <osalvador@...e.de>
Cc: "Huang, Ying" <ying.huang@...el.com>
Cc: Mel Gorman <mgorman@...hsingularity.net>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---
 mm/vmscan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 1f2d79e8c43c..4385b59ef599 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1040,7 +1040,7 @@ static bool skip_throttle_noprogress(pg_data_t *pgdat)
 	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);
@@ -3909,7 +3909,7 @@ static bool pgdat_balanced(pg_data_t *pgdat, int order, int highest_zoneidx)
 	}
 
 	/*
-	 * 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.
 	 */
-- 
2.33.1