| David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 1 | if BLOCK |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | |
| 3 | menu "IO Schedulers" |
| 4 | |
| 5 | config IOSCHED_NOOP |
| 6 | bool |
| 7 | default y |
| 8 | ---help--- |
| 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 |
| 13 | the kernel. |
| 14 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | config IOSCHED_DEADLINE |
| 16 | tristate "Deadline I/O scheduler" |
| 17 | default y |
| 18 | ---help--- |
| Jens Axboe | 492af63 | 2009-10-03 09:37:51 +0200 | [diff] [blame] | 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 |
| 22 | in case of expiry. |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | config IOSCHED_CFQ |
| 25 | tristate "CFQ I/O scheduler" |
| 26 | default y |
| 27 | ---help--- |
| 28 | The CFQ I/O scheduler tries to distribute bandwidth equally |
| 29 | among all processes in the system. It should provide a fair |
| Jens Axboe | 08dc872 | 2009-10-03 09:40:47 +0200 | [diff] [blame] | 30 | and low latency working environment, suitable for both desktop |
| 31 | and server systems. |
| 32 | |
| Jesper Juhl | a8e14b9 | 2007-02-17 20:08:22 +0100 | [diff] [blame] | 33 | This is the default I/O scheduler. |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
| Vivek Goyal | 25bc6b0 | 2009-12-03 12:59:43 -0500 | [diff] [blame] | 35 | config CFQ_GROUP_IOSCHED |
| 36 | bool "CFQ Group Scheduling support" |
| Vivek Goyal | afc24d4 | 2010-04-26 19:27:56 +0200 | [diff] [blame] | 37 | depends on IOSCHED_CFQ && BLK_CGROUP |
| Vivek Goyal | 25bc6b0 | 2009-12-03 12:59:43 -0500 | [diff] [blame] | 38 | default n |
| 39 | ---help--- |
| 40 | Enable group IO scheduling in CFQ. |
| 41 | |
| Nate Diller | 131dda7 | 2005-10-30 15:02:19 -0800 | [diff] [blame] | 42 | choice |
| 43 | prompt "Default I/O scheduler" |
| Jens Axboe | b17fd9b | 2006-06-19 10:06:48 +0200 | [diff] [blame] | 44 | default DEFAULT_CFQ |
| Nate Diller | 131dda7 | 2005-10-30 15:02:19 -0800 | [diff] [blame] | 45 | help |
| 46 | Select the I/O scheduler which will be used by default for all |
| 47 | block devices. |
| 48 | |
| Nate Diller | 131dda7 | 2005-10-30 15:02:19 -0800 | [diff] [blame] | 49 | config DEFAULT_DEADLINE |
| Jens Axboe | c6ea2ba | 2005-11-04 08:44:58 +0100 | [diff] [blame] | 50 | bool "Deadline" if IOSCHED_DEADLINE=y |
| Nate Diller | 131dda7 | 2005-10-30 15:02:19 -0800 | [diff] [blame] | 51 | |
| 52 | config DEFAULT_CFQ |
| Jens Axboe | c6ea2ba | 2005-11-04 08:44:58 +0100 | [diff] [blame] | 53 | bool "CFQ" if IOSCHED_CFQ=y |
| Nate Diller | 131dda7 | 2005-10-30 15:02:19 -0800 | [diff] [blame] | 54 | |
| 55 | config DEFAULT_NOOP |
| 56 | bool "No-op" |
| 57 | |
| 58 | endchoice |
| 59 | |
| 60 | config DEFAULT_IOSCHED |
| 61 | string |
| Nate Diller | 131dda7 | 2005-10-30 15:02:19 -0800 | [diff] [blame] | 62 | default "deadline" if DEFAULT_DEADLINE |
| 63 | default "cfq" if DEFAULT_CFQ |
| 64 | default "noop" if DEFAULT_NOOP |
| 65 | |
| Jens Axboe | d348499 | 2017-01-13 14:43:58 -0700 | [diff] [blame] | 66 | config MQ_IOSCHED_DEADLINE |
| 67 | tristate "MQ deadline I/O scheduler" |
| 68 | default y |
| 69 | ---help--- |
| 70 | MQ version of the deadline IO scheduler. |
| 71 | |
| 72 | config MQ_IOSCHED_NONE |
| 73 | bool |
| 74 | default y |
| 75 | |
| 76 | choice |
| 77 | prompt "Default single-queue blk-mq I/O scheduler" |
| 78 | default DEFAULT_SQ_NONE |
| 79 | help |
| 80 | Select the I/O scheduler which will be used by default for blk-mq |
| 81 | managed block devices with a single queue. |
| 82 | |
| 83 | config DEFAULT_SQ_DEADLINE |
| 84 | bool "MQ Deadline" if MQ_IOSCHED_DEADLINE=y |
| 85 | |
| 86 | config DEFAULT_SQ_NONE |
| 87 | bool "None" |
| 88 | |
| 89 | endchoice |
| 90 | |
| 91 | config DEFAULT_SQ_IOSCHED |
| 92 | string |
| 93 | default "mq-deadline" if DEFAULT_SQ_DEADLINE |
| 94 | default "none" if DEFAULT_SQ_NONE |
| 95 | |
| 96 | choice |
| 97 | prompt "Default multi-queue blk-mq I/O scheduler" |
| 98 | default DEFAULT_MQ_NONE |
| 99 | help |
| 100 | Select the I/O scheduler which will be used by default for blk-mq |
| 101 | managed block devices with multiple queues. |
| 102 | |
| 103 | config DEFAULT_MQ_DEADLINE |
| 104 | bool "MQ Deadline" if MQ_IOSCHED_DEADLINE=y |
| 105 | |
| 106 | config DEFAULT_MQ_NONE |
| 107 | bool "None" |
| 108 | |
| 109 | endchoice |
| 110 | |
| 111 | config DEFAULT_MQ_IOSCHED |
| 112 | string |
| 113 | default "mq-deadline" if DEFAULT_MQ_DEADLINE |
| 114 | default "none" if DEFAULT_MQ_NONE |
| 115 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | endmenu |
| David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 117 | |
| 118 | endif |