[merged mm-hotfixes-stable] mm-swap-add-back-full-cluster-when-no-entry-is-reclaimed.patch removed from -mm tree

[merged mm-hotfixes-stable] mm-swap-add-back-full-cluster-when-no-entry-is-reclaimed.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: swap: add back full cluster when no entry is reclaimed
has been removed from the -mm tree.  Its filename was
     mm-swap-add-back-full-cluster-when-no-entry-is-reclaimed.patch

This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Kemeng Shi <shikemeng@huaweicloud.com>
Subject: mm: swap: add back full cluster when no entry is reclaimed
Date: Mon, 24 Feb 2025 19:39:10 +0800

If no swap cache is reclaimed, cluster taken off from full_clusters list
will not be put in any list and we can't reclaime HAS_CACHE slots
efficiently.  Do relocate_cluster for such cluster to avoid inefficiency.

Link: https://lkml.kernel.org/r/20250224113910.522439-1-shikemeng@huaweicloud.com
Fixes: 3b644773eefd ("mm, swap: reduce contention on device lock")
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Kairui Song <kasong@tencent.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/swapfile.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/mm/swapfile.c~mm-swap-add-back-full-cluster-when-no-entry-is-reclaimed
+++ a/mm/swapfile.c
@@ -858,6 +858,10 @@ static void swap_reclaim_full_clusters(s
 			offset++;
 		}
 
+		/* in case no swap cache is reclaimed */
+		if (ci->flags == CLUSTER_FLAG_NONE)
+			relocate_cluster(si, ci);
+
 		unlock_cluster(ci);
 		if (to_scan <= 0)
 			break;
_

Patches currently in -mm which might be from shikemeng@huaweicloud.com are

mm-swap-remove-setting-swap_map_bad-for-discard-cluster.patch
mm-swap-correct-comment-in-swap_usage_sub.patch
mm-swap-remove-stale-comment-of-swap_reclaim_full_clusters.patch