Commit 65752aef authored Jul 03, 2020 by Yufen Yu Committed by Jens Axboe Jul 06, 2020

docs: block: update and fix tiny error for bfq



The max value of blkio.bfq.weight is 1000, rather than 10000.
And 'weights' have been remove from /sys/block/XXX/queue/iosched.

Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 3197d48a

Documentation/block/bfq-iosched.rst

+1 −8

Original line number	Original line	Diff line number	Diff line
	@@ -492,13 +492,6 @@ set max_budget to higher values than those to which BFQ would have set
	it with auto-tuning. An alternative way to achieve this goal is to		it with auto-tuning. An alternative way to achieve this goal is to
	just increase the value of timeout_sync, leaving max_budget equal to 0.		just increase the value of timeout_sync, leaving max_budget equal to 0.

	weights
	-------

	Read-only parameter, used to show the weights of the currently active
	BFQ queues.


	4. Group scheduling with BFQ		4. Group scheduling with BFQ
	============================		============================

	@@ -566,7 +559,7 @@ Parameters to set
	For each group, there is only the following parameter to set.		For each group, there is only the following parameter to set.

	weight (namely blkio.bfq.weight or io.bfq-weight): the weight of the		weight (namely blkio.bfq.weight or io.bfq-weight): the weight of the
	group inside its parent. Available values: 1..10000 (default 100). The		group inside its parent. Available values: 1..1000 (default 100). The
	linear mapping between ioprio and weights, described at the beginning		linear mapping between ioprio and weights, described at the beginning
	of the tunable section, is still valid, but all weights higher than		of the tunable section, is still valid, but all weights higher than
	IOPRIO_BE_NR*10 are mapped to ioprio 0.		IOPRIO_BE_NR*10 are mapped to ioprio 0.