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

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

[Andrew Morton]

The quilt patch titled
     Subject: mm: document /sys/class/bdi/<bdi>/strict_limit knob
has been removed from the -mm tree.  Its filename was
     mm-document-sys-class-bdi-bdi-strict_limit-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>/strict_limit knob
Date: Fri, 18 Nov 2022 16:51:58 -0800

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

Link: https://lkml.kernel.org/r/20221119005215.3052436-4-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 |   11 +++++++++++
 1 file changed, 11 insertions(+)

--- a/Documentation/ABI/testing/sysfs-class-bdi~mm-document-sys-class-bdi-bdi-strict_limit-knob
+++ a/Documentation/ABI/testing/sysfs-class-bdi
@@ -56,6 +56,17 @@ Description:
 	be trusted to play fair.
 
 	(read-write)
+What:		/sys/class/bdi/<bdi>/strict_limit
+Date:		October 2022
+Contact:	Stefan Roesch <shr@devkernel.io>
+Description:
+	Forces per-BDI checks for the share of given device in the write-back
+	cache even before the global background dirty limit is reached. This
+	is useful in situations where the global limit is much higher than
+	affordable for given relatively slow (or untrusted) device. Turning
+	strictlimit on has no visible effect if max_ratio is equal to 100%.
+
+	(read-write)
 What:		/sys/class/bdi/<bdi>/stable_pages_required
 Date:		January 2008
 Contact:	Peter Zijlstra <a.p.zijlstra@chello.nl>
_

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