1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 menu "IO Schedulers" 2 menu "IO Schedulers"
3 3
4 config MQ_IOSCHED_DEADLINE 4 config MQ_IOSCHED_DEADLINE
5 tristate "MQ deadline I/O scheduler" 5 tristate "MQ deadline I/O scheduler"
6 default y 6 default y
7 help 7 help
8 MQ version of the deadline IO schedu 8 MQ version of the deadline IO scheduler.
9 9
10 config MQ_IOSCHED_KYBER 10 config MQ_IOSCHED_KYBER
11 tristate "Kyber I/O scheduler" 11 tristate "Kyber I/O scheduler"
12 default y 12 default y
13 help 13 help
14 The Kyber I/O scheduler is a low-ove 14 The Kyber I/O scheduler is a low-overhead scheduler suitable for
15 multiqueue and other fast devices. G 15 multiqueue and other fast devices. Given target latencies for reads and
16 synchronous writes, it will self-tun 16 synchronous writes, it will self-tune queue depths to achieve that
17 goal. 17 goal.
18 18
19 config IOSCHED_BFQ 19 config IOSCHED_BFQ
20 tristate "BFQ I/O scheduler" 20 tristate "BFQ I/O scheduler"
21 select BLK_ICQ 21 select BLK_ICQ
22 help 22 help
23 BFQ I/O scheduler for BLK-MQ. BFQ dist 23 BFQ I/O scheduler for BLK-MQ. BFQ distributes the bandwidth of
24 of the device among all processes acco 24 of the device among all processes according to their weights,
25 regardless of the device parameters an 25 regardless of the device parameters and with any workload. It
26 also guarantees a low latency to inter 26 also guarantees a low latency to interactive and soft
27 real-time applications. Details in 27 real-time applications. Details in
28 Documentation/block/bfq-iosched.rst 28 Documentation/block/bfq-iosched.rst
29 29
30 config BFQ_GROUP_IOSCHED 30 config BFQ_GROUP_IOSCHED
31 bool "BFQ hierarchical scheduling suppo 31 bool "BFQ hierarchical scheduling support"
32 depends on IOSCHED_BFQ && BLK_CGROUP 32 depends on IOSCHED_BFQ && BLK_CGROUP
33 default y <<
34 select BLK_CGROUP_RWSTAT 33 select BLK_CGROUP_RWSTAT
35 help 34 help
36 35
37 Enable hierarchical scheduling in BFQ, 36 Enable hierarchical scheduling in BFQ, using the blkio
38 (cgroups-v1) or io (cgroups-v2) control 37 (cgroups-v1) or io (cgroups-v2) controller.
39 38
40 config BFQ_CGROUP_DEBUG 39 config BFQ_CGROUP_DEBUG
41 bool "BFQ IO controller debugging" 40 bool "BFQ IO controller debugging"
42 depends on BFQ_GROUP_IOSCHED 41 depends on BFQ_GROUP_IOSCHED
43 help 42 help
44 Enable some debugging help. Currently 43 Enable some debugging help. Currently it exports additional stat
45 files in a cgroup which can be useful 44 files in a cgroup which can be useful for debugging.
46 45
47 endmenu 46 endmenu
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