[merged mm-stable] mm-document-sys-class-bdi-bdi-max_ratio_fine-knob.patch removed from -mm tree

[merged mm-stable] mm-document-sys-class-bdi-bdi-max_ratio_fine-knob.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: document /sys/class/bdi/<bdi>/max_ratio_fine knob
has been removed from the -mm tree.  Its filename was
     mm-document-sys-class-bdi-bdi-max_ratio_fine-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@devkernel.io>
Subject: mm: document /sys/class/bdi/<bdi>/max_ratio_fine knob
Date: Fri, 18 Nov 2022 16:52:12 -0800

This documents the new /sys/class/bdi/<bdi>/max_ratio_fine knob.

[akpm@linux-foundation.org: fix htmldocs warnings]
Link: https://lkml.kernel.org/r/20221119005215.3052436-18-shr@devkernel.io
Signed-off-by: Stefan Roesch <shr@devkernel.io>
Cc: Chris Mason <clm@meta.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 Documentation/ABI/testing/sysfs-class-bdi |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/Documentation/ABI/testing/sysfs-class-bdi~mm-document-sys-class-bdi-bdi-max_ratio_fine-knob
+++ a/Documentation/ABI/testing/sysfs-class-bdi
@@ -57,6 +57,19 @@ Description:
 
 	(read-write)
 
+What:		/sys/class/bdi/<bdi>/max_ratio_fine
+Date:		November 2022
+Contact:	Stefan Roesch <shr@devkernel.io>
+Description:
+	Allows limiting a particular device to use not more than the
+	given value of the write-back cache.  The value is given as part
+	of 1 million. 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, or a FUSE mount
+	which cannot be trusted to play fair.
+
+	(read-write)
+
 What:		/sys/class/bdi/<bdi>/min_bytes
 Date:		October 2022
 Contact:	Stefan Roesch <shr@devkernel.io>
_

Patches currently in -mm which might be from shr@devkernel.io are