linux-kernel - [PATCH 4/4] mm/slub: don't read slab->cpu_partial

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Date: Sun, 31 Mar 2024 10:19:26 +0800
From: <xiongwei.song@...driver.com>
To: <vbabka@...e.cz>, <rientjes@...gle.com>, <cl@...ux.com>,
        <penberg@...nel.org>, <iamjoonsoo.kim@....com>,
        <akpm@...ux-foundation.org>, <roman.gushchin@...ux.dev>,
        <42.hyeyoo@...il.com>
CC: <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <chengming.zhou@...ux.dev>
Subject: [PATCH 4/4] mm/slub: don't read slab->cpu_partial_slabs directly

From: Xiongwei Song <xiongwei.song@...driver.com>

We can use slub_get_cpu_partial() to read cpu_partial_slabs.

Signed-off-by: Xiongwei Song <xiongwei.song@...driver.com>
---
 mm/slub.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/slub.c b/mm/slub.c
index ec91c7435d4e..47ea06d6feae 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2966,7 +2966,7 @@ static void put_cpu_partial(struct kmem_cache *s, struct slab *slab, int drain)
 	oldslab = this_cpu_read(s->cpu_slab->partial);
 
 	if (oldslab) {
-		if (drain && oldslab->slabs >= s->cpu_partial_slabs) {
+		if (drain && oldslab->slabs >= slub_get_cpu_partial(s)) {
 			/*
 			 * Partial array is full. Move the existing set to the
 			 * per node partial list. Postpone the actual unfreezing
-- 
2.27.0