linux-kernel - [PATCH 3/3] mm/slub: Fix release all resources used by a slab cache

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Message-Id: <20200614123923.99189-4-songmuchun@bytedance.com>
Date:   Sun, 14 Jun 2020 20:39:23 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     cl@...ux.com, penberg@...nel.org, rientjes@...gle.com,
        iamjoonsoo.kim@....com, akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Muchun Song <songmuchun@...edance.com>
Subject: [PATCH 3/3] mm/slub: Fix release all resources used by a slab cache

The function of __kmem_cache_shutdown() is that release all resources
used by the slab cache, while currently it stop release resources when
the preceding node is not empty.

Signed-off-by: Muchun Song <songmuchun@...edance.com>
---
 mm/slub.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index b73505df3de2..4e477ef0f2b9 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3839,6 +3839,7 @@ bool __kmem_cache_empty(struct kmem_cache *s)
  */
 int __kmem_cache_shutdown(struct kmem_cache *s)
 {
+	int ret = 0;
 	int node;
 	struct kmem_cache_node *n;
 
@@ -3846,11 +3847,11 @@ int __kmem_cache_shutdown(struct kmem_cache *s)
 	/* Attempt to free all objects */
 	for_each_kmem_cache_node(s, node, n) {
 		free_partial(s, n);
-		if (node_nr_slabs(n))
-			return 1;
+		if (!ret && node_nr_slabs(n))
+			ret = 1;
 	}
 	sysfs_slab_remove(s);
-	return 0;
+	return ret;
 }
 
 /********************************************************************
-- 
2.11.0