Commit 54790f30 authored by Stefan Roesch's avatar Stefan Roesch Committed by Andrew Morton
Browse files

mm: document /sys/class/bdi/<bdi>/max_ratio_fine knob 

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: default avatarStefan Roesch <shr@devkernel.io>
Cc: Chris Mason <clm@meta.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent bca52dcb

Documentation/ABI/testing/sysfs-class-bdi

+13 −0
Original line number Diff line number Diff line
@@ -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>