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Diffstat (limited to 'Documentation/block/switching-sched.txt')
| -rw-r--r-- | Documentation/block/switching-sched.txt | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/Documentation/block/switching-sched.txt b/Documentation/block/switching-sched.txt index 3b2612e342f1..7977f6fb8b20 100644 --- a/Documentation/block/switching-sched.txt +++ b/Documentation/block/switching-sched.txt @@ -13,11 +13,9 @@ you can do so by typing: # mount none /sys -t sysfs -As of the Linux 2.6.10 kernel, it is now possible to change the -IO scheduler for a given block device on the fly (thus making it possible, -for instance, to set the CFQ scheduler for the system default, but -set a specific device to use the deadline or noop schedulers - which -can improve that device's throughput). +It is possible to change the IO scheduler for a given block device on +the fly to select one of mq-deadline, none, bfq, or kyber schedulers - +which can improve that device's throughput. To set a specific scheduler, simply do this: @@ -30,8 +28,8 @@ The list of defined schedulers can be found by simply doing a "cat /sys/block/DEV/queue/scheduler" - the list of valid names will be displayed, with the currently selected scheduler in brackets: -# cat /sys/block/hda/queue/scheduler -noop deadline [cfq] -# echo deadline > /sys/block/hda/queue/scheduler -# cat /sys/block/hda/queue/scheduler -noop [deadline] cfq +# cat /sys/block/sda/queue/scheduler +[mq-deadline] kyber bfq none +# echo none >/sys/block/sda/queue/scheduler +# cat /sys/block/sda/queue/scheduler +[none] mq-deadline kyber bfq |