linux-kernel - [PATCH v4 4/4] mm/slub: make the description of slab_min

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Date: Fri, 15 Dec 2023 11:41:50 +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,
	quic_jjohnson@...cinc.com,
	linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Xiongwei Song <xiongwei.song@...driver.com>
Subject: [PATCH v4 4/4] mm/slub: make the description of slab_min_objects helpful in doc

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

There is no a value assigned to slab_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 6579a55b7852..213491ffb66f 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:
 
-.. slab_min_objects=x		(default 4)
+.. slab_min_objects=x		(default:automatically scaled by number of cpus)
 .. slab_min_order=x		(default 0)
 .. slab_max_order=x		(default 3 (PAGE_ALLOC_COSTLY_ORDER))
 
-- 
2.34.1