linux-kernel - [PATCH v2 3/3] mm/slub: correct the default value of slub_min

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Message-Id: <20231203001501.126339-4-sxwjean@me.com>
Date:   Sun,  3 Dec 2023 08:15:01 +0800
From:   sxwjean@...com
To:     vbabka@...e.cz, 42.hyeyoo@...il.com, cl@...ux.com,
        linux-mm@...ck.org
Cc:     penberg@...nel.org, rientjes@...gle.com, iamjoonsoo.kim@....com,
        roman.gushchin@...ux.dev, corbet@....net, keescook@...omium.org,
        arnd@...db.de, akpm@...ux-foundation.org,
        gregkh@...uxfoundation.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Xiongwei Song <xiongwei.song@...driver.com>
Subject: [PATCH v2 3/3] mm/slub: correct the default value of slub_min_objects in doc

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

There is no a value assigned to slub_min_objects by default, it always
is 0 that is initialized by compiler if no assigned value by command line.
min_objects is calculated based on processor numbers in calculate_order().
For more details, see commit 9b2cd506e5f2 ("slub: Calculate min_objects
based on number of processors.")

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

diff --git a/Documentation/mm/slub.rst b/Documentation/mm/slub.rst
index be75971532f5..1f4399581449 100644
--- a/Documentation/mm/slub.rst
+++ b/Documentation/mm/slub.rst
@@ -150,7 +150,7 @@ list_lock once in a while to deal with partial slabs. That overhead is
 governed by the order of the allocation for each slab. The allocations
 can be influenced by kernel parameters:
 
-.. slub_min_objects=x		(default 4)
+.. slub_min_objects=x		(default 0)
 .. slub_min_order=x		(default 0)
 .. slub_max_order=x		(default 3 (PAGE_ALLOC_COSTLY_ORDER))
 
-- 
2.34.1