[merged mm-stable] mm-z3fold-put-z3fold-page-back-into-unbuddied-list-when-reclaim-or-migration-fails.patch removed from -mm tree

[merged mm-stable] mm-z3fold-put-z3fold-page-back-into-unbuddied-list-when-reclaim-or-migration-fails.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/z3fold: put z3fold page back into unbuddied list when reclaim or migration fails
has been removed from the -mm tree.  Its filename was
     mm-z3fold-put-z3fold-page-back-into-unbuddied-list-when-reclaim-or-migration-fails.patch

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

------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/z3fold: put z3fold page back into unbuddied list when reclaim or migration fails
Date: Fri, 29 Apr 2022 14:40:43 +0800

When doing z3fold page reclaim or migration, the page is removed from
unbuddied list.  If reclaim or migration succeeds, it's fine as page is
released.  But in case it fails, the page is not put back into unbuddied
list now.  The page will be leaked until next compaction work, reclaim or
migration is done.

Link: https://lkml.kernel.org/r/20220429064051.61552-7-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/z3fold.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/mm/z3fold.c~mm-z3fold-put-z3fold-page-back-into-unbuddied-list-when-reclaim-or-migration-fails
+++ a/mm/z3fold.c
@@ -1422,6 +1422,8 @@ next:
 			spin_lock(&pool->lock);
 			list_add(&page->lru, &pool->lru);
 			spin_unlock(&pool->lock);
+			if (list_empty(&zhdr->buddy))
+				add_to_unbuddied(pool, zhdr);
 			z3fold_page_unlock(zhdr);
 			clear_bit(PAGE_CLAIMED, &page->private);
 		}
@@ -1638,6 +1640,8 @@ static void z3fold_page_putback(struct p
 	spin_lock(&pool->lock);
 	list_add(&page->lru, &pool->lru);
 	spin_unlock(&pool->lock);
+	if (list_empty(&zhdr->buddy))
+		add_to_unbuddied(pool, zhdr);
 	clear_bit(PAGE_CLAIMED, &page->private);
 	z3fold_page_unlock(zhdr);
 }
_

Patches currently in -mm which might be from linmiaohe@huawei.com are