The quilt patch titled
Subject: mm: document /sys/class/bdi/<bdi>/max_bytes knob
has been removed from the -mm tree. Its filename was
mm-document-sys-class-bdi-bdi-max_bytes-knob.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Stefan Roesch <shr@xxxxxxxxxxxx>
Subject: mm: document /sys/class/bdi/<bdi>/max_bytes knob
Date: Fri, 18 Nov 2022 16:52:04 -0800
This documents the new /sys/class/bdi/<bdi>/max_bytes knob.
Link: https://lkml.kernel.org/r/20221119005215.3052436-10-shr@xxxxxxxxxxxx
Signed-off-by: Stefan Roesch <shr@xxxxxxxxxxxx>
Cc: Chris Mason <clm@xxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/ABI/testing/sysfs-class-bdi | 14 ++++++++++++++
1 file changed, 14 insertions(+)
--- a/Documentation/ABI/testing/sysfs-class-bdi~mm-document-sys-class-bdi-bdi-max_bytes-knob
+++ a/Documentation/ABI/testing/sysfs-class-bdi
@@ -56,6 +56,20 @@ Description:
be trusted to play fair.
(read-write)
+
+What: /sys/class/bdi/<bdi>/max_bytes
+Date: October 2022
+Contact: Stefan Roesch <shr@xxxxxxxxxxxx>
+Description:
+ Allows limiting a particular device to use not more than the
+ given 'max_bytes' of the write-back cache. This is useful in
+ situations where we want to avoid one device taking all or
+ most of the write-back cache. For example in case of an NFS
+ mount that is prone to get stuck, a FUSE mount which cannot be
+ trusted to play fair, or a nbd device.
+
+ (read-write)
+
What: /sys/class/bdi/<bdi>/strict_limit
Date: October 2022
Contact: Stefan Roesch <shr@xxxxxxxxxxxx>
_
Patches currently in -mm which might be from shr@xxxxxxxxxxxx are
