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authorMiaohe Lin <linmiaohe@huawei.com>2022-04-29 09:40:43 +0300
committerakpm <akpm@linux-foundation.org>2022-05-27 19:33:44 +0300
commit6cf9a34967ed544ca4c0949e9928dc78fca57ef3 (patch)
tree32c31963ddbc44e0d73582ee903611ed0313fb3c /mm
parentf4bad643c1d602f7154cf0d8eeb509136a55dccb (diff)
downloadlinux-6cf9a34967ed544ca4c0949e9928dc78fca57ef3.tar.xz
mm/z3fold: put z3fold page back into unbuddied list when reclaim or migration fails
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>
Diffstat (limited to 'mm')
-rw-r--r--mm/z3fold.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/z3fold.c b/mm/z3fold.c
index 5f5d5f1556be..a1c150fc8def 100644
--- a/mm/z3fold.c
+++ b/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 page *page)
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);
}