1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
>> 2 if BLOCK
>> 3
2 menu "IO Schedulers" 4 menu "IO Schedulers"
3 5
4 config MQ_IOSCHED_DEADLINE 6 config MQ_IOSCHED_DEADLINE
5 tristate "MQ deadline I/O scheduler" 7 tristate "MQ deadline I/O scheduler"
6 default y 8 default y
7 help !! 9 ---help---
8 MQ version of the deadline IO schedu 10 MQ version of the deadline IO scheduler.
9 11
10 config MQ_IOSCHED_KYBER 12 config MQ_IOSCHED_KYBER
11 tristate "Kyber I/O scheduler" 13 tristate "Kyber I/O scheduler"
12 default y 14 default y
13 help !! 15 ---help---
14 The Kyber I/O scheduler is a low-ove 16 The Kyber I/O scheduler is a low-overhead scheduler suitable for
15 multiqueue and other fast devices. G 17 multiqueue and other fast devices. Given target latencies for reads and
16 synchronous writes, it will self-tun 18 synchronous writes, it will self-tune queue depths to achieve that
17 goal. 19 goal.
18 20
19 config IOSCHED_BFQ 21 config IOSCHED_BFQ
20 tristate "BFQ I/O scheduler" 22 tristate "BFQ I/O scheduler"
21 select BLK_ICQ !! 23 ---help---
22 help <<
23 BFQ I/O scheduler for BLK-MQ. BFQ dist 24 BFQ I/O scheduler for BLK-MQ. BFQ distributes the bandwidth of
24 of the device among all processes acco 25 of the device among all processes according to their weights,
25 regardless of the device parameters an 26 regardless of the device parameters and with any workload. It
26 also guarantees a low latency to inter 27 also guarantees a low latency to interactive and soft
27 real-time applications. Details in 28 real-time applications. Details in
28 Documentation/block/bfq-iosched.rst 29 Documentation/block/bfq-iosched.rst
29 30
30 config BFQ_GROUP_IOSCHED 31 config BFQ_GROUP_IOSCHED
31 bool "BFQ hierarchical scheduling suppo 32 bool "BFQ hierarchical scheduling support"
32 depends on IOSCHED_BFQ && BLK_CGROUP 33 depends on IOSCHED_BFQ && BLK_CGROUP
33 default y !! 34 ---help---
34 select BLK_CGROUP_RWSTAT <<
35 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
>> 47
>> 48 endif
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