9 The no-op I/O scheduler is a minimal scheduler that does basic merging
10 and sorting. Its main uses include non-disk based block devices like
11 memory devices, and specialised software or hardware environments
12 that do their own scheduling and require only minimal assistance from
15 config IOSCHED_DEADLINE
16 tristate "Deadline I/O scheduler"
19 The deadline I/O scheduler is simple and compact. It will provide
20 CSCAN service with FIFO expiration of requests, switching to
21 a new point in the service tree and doing a batch of IO from there
25 tristate "CFQ I/O scheduler"
28 The CFQ I/O scheduler tries to distribute bandwidth equally
29 among all processes in the system. It should provide a fair
30 and low latency working environment, suitable for both desktop
33 This is the default I/O scheduler.
35 config MQ_IOSCHED_DEADLINE
36 tristate "MQ deadline I/O scheduler"
39 MQ version of the deadline IO scheduler.
41 config CFQ_GROUP_IOSCHED
42 bool "CFQ Group Scheduling support"
43 depends on IOSCHED_CFQ && BLK_CGROUP
46 Enable group IO scheduling in CFQ.
49 prompt "Default I/O scheduler"
52 Select the I/O scheduler which will be used by default for all
55 config DEFAULT_DEADLINE
56 bool "Deadline" if IOSCHED_DEADLINE=y
59 bool "CFQ" if IOSCHED_CFQ=y
66 config DEFAULT_IOSCHED
68 default "deadline" if DEFAULT_DEADLINE
69 default "cfq" if DEFAULT_CFQ
70 default "noop" if DEFAULT_NOOP