Commit 9c832a8d authored by Stefan Roesch's avatar Stefan Roesch Committed by Andrew Morton
Browse files

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

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

[akpm@linux-foundation.org: fix htmldocs warnings]
Link: https://lkml.kernel.org/r/20221119005215.3052436-15-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 9c84819b

Documentation/ABI/testing/sysfs-class-bdi

+15 −0
Original line number Diff line number Diff line
@@ -57,6 +57,21 @@ Description: 


	(read-write)



What:		/sys/class/bdi/<bdi>/min_bytes

Date:		October 2022

Contact:	Stefan Roesch <shr@devkernel.io>

Description:

	Under normal circumstances each device is given a part of the

	total write-back cache that relates to its current average

	writeout speed in relation to the other devices.



	The 'min_bytes' parameter allows assigning a minimum

	percentage of the write-back cache to a particular device

	expressed in bytes.

	For example, this is useful for providing a minimum QoS.



	(read-write)



What:		/sys/class/bdi/<bdi>/max_bytes

Date:		October 2022

Contact:	Stefan Roesch <shr@devkernel.io>