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# SPDX-License-Identifier: GPL-2.0
if BLOCK
menu "IO Schedulers"
config MQ_IOSCHED_DEADLINE
tristate "MQ deadline I/O scheduler"
default y
help
MQ version of the deadline IO scheduler.
config MQ_IOSCHED_KYBER
tristate "Kyber I/O scheduler"
default y
help
The Kyber I/O scheduler is a low-overhead scheduler suitable for
multiqueue and other fast devices. Given target latencies for reads and
synchronous writes, it will self-tune queue depths to achieve that
goal.
config IOSCHED_BFQ
tristate "BFQ I/O scheduler"
help
BFQ I/O scheduler for BLK-MQ. BFQ distributes the bandwidth of
of the device among all processes according to their weights,
regardless of the device parameters and with any workload. It
also guarantees a low latency to interactive and soft
real-time applications. Details in
Documentation/block/bfq-iosched.rst
config BFQ_GROUP_IOSCHED
bool "BFQ hierarchical scheduling support"
depends on IOSCHED_BFQ && BLK_CGROUP
select BLK_CGROUP_RWSTAT
help
Enable hierarchical scheduling in BFQ, using the blkio
(cgroups-v1) or io (cgroups-v2) controller.
config BFQ_CGROUP_DEBUG
bool "BFQ IO controller debugging"
depends on BFQ_GROUP_IOSCHED
help
Enable some debugging help. Currently it exports additional stat
files in a cgroup which can be useful for debugging.
endmenu
endif