From 773151dc41035657175eb7e5bc51721943039b31 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Date: Mon, 27 Sep 2021 15:59:41 +0200
Subject: [PATCH] ABI: sysfs-kernel-slab: Document some stats
Git-commit: 773151dc41035657175eb7e5bc51721943039b31
Patch-mainline: v5.16-rc1
References: git-fixes

Document three slab stats that were added in 2011 and 2017.

Fixes: 49e2258586b4 ("slub: per cpu cache for partial pages")
Fixes: 8eb8284b4129 ("usercopy: Prepare for usercopy whitelisting")

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/8960435734c5aa918568ce7891171448c4d68709.1632750608.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 Documentation/ABI/testing/sysfs-kernel-slab | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-kernel-slab b/Documentation/ABI/testing/sysfs-kernel-slab
index 77e5840b00a5..c440f4946e12 100644
--- a/Documentation/ABI/testing/sysfs-kernel-slab
+++ b/Documentation/ABI/testing/sysfs-kernel-slab
@@ -496,3 +496,24 @@ Contact:	Pekka Enberg <penberg@cs.helsinki.fi>,
 Description:
 		Writing to the validate file causes SLUB to traverse all of its
 		cache's objects and check the validity of metadata.
+
+What:		/sys/kernel/slab/<cache>/usersize
+Date:		Jun 2017
+Contact:	David Windsor <dave@nullcore.net>
+Description:
+		The usersize file is read-only and contains the usercopy
+		region size.
+
+What:		/sys/kernel/slab/<cache>/slabs_cpu_partial
+Date:		Aug 2011
+Contact:	Christoph Lameter <cl@linux.com>
+Description:
+		This read-only file shows the number of partialli allocated
+		frozen slabs.
+
+What:		/sys/kernel/slab/<cache>/cpu_partial
+Date:		Aug 2011
+Contact:	Christoph Lameter <cl@linux.com>
+Description:
+		This read-only file shows the number of per cpu partial
+		pages to keep around.
-- 
2.26.2