From: Hao Li <hao.li@linux.dev>
To: vbabka@suse.cz, harry.yoo@oracle.com, akpm@linux-foundation.org,
cl@gentwo.org, rientjes@google.com, roman.gushchin@linux.dev,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
hao.li@linux.dev
Cc: akpm@linux-foundation.org, cl@gentwo.org, rientjes@google.com,
roman.gushchin@linux.dev, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, Hao Li <hao.li@linux.dev>
Subject: [PATCH] slub: let need_slab_obj_exts() return false if SLAB_NO_OBJ_EXT is set
Date: Thu, 5 Feb 2026 20:07:23 +0800 [thread overview]
Message-ID: <20260205120709.425719-1-hao.li@linux.dev> (raw)
SLAB_NO_OBJ_EXT is set for boot caches, but need_slab_obj_exts() doesn't
check this flag. We should return false unconditionally when
SLAB_NO_OBJ_EXT is set.
Signed-off-by: Hao Li <hao.li@linux.dev>
---
mm/slub.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/mm/slub.c b/mm/slub.c
index 865047eaf02b..3b1402e1c39d 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -901,6 +901,9 @@ static inline unsigned long get_orig_size(struct kmem_cache *s, void *object)
*/
static inline bool need_slab_obj_exts(struct kmem_cache *s)
{
+ if (s->flags & SLAB_NO_OBJ_EXT)
+ return false;
+
if (memcg_kmem_online() && (s->flags & SLAB_ACCOUNT))
return true;
--
2.50.1
next reply other threads:[~2026-02-05 12:07 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-05 12:07 Hao Li [this message]
2026-02-06 0:53 ` Harry Yoo
2026-02-06 9:40 ` Vlastimil Babka
2026-02-06 10:01 ` Harry Yoo
2026-02-06 10:03 ` Vlastimil Babka
2026-02-06 10:21 ` Harry Yoo
2026-02-06 11:35 ` Hao Li
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