ABI: sysfs-kernel-slab: Document some stats

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>

diff --git a/Documentation/ABI/testing/sysfs-kernel-slab b/Documentation/ABI/testing/sysfs-kernel-slab
index 77e5840b00a5c257d048e74cb22791eef21af81d..c440f4946e1211bb914bac0b696ba9f120329337 100644 (file)
--- 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.