diff options
Diffstat (limited to 'Documentation/block/switching-sched.txt')
| -rw-r--r-- | Documentation/block/switching-sched.txt | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/Documentation/block/switching-sched.txt b/Documentation/block/switching-sched.txt deleted file mode 100644 index 7977f6fb8b20..000000000000 --- a/Documentation/block/switching-sched.txt +++ /dev/null @@ -1,35 +0,0 @@ -To choose IO schedulers at boot time, use the argument 'elevator=deadline'. -'noop' and 'cfq' (the default) are also available. IO schedulers are assigned -globally at boot time only presently. - -Each io queue has a set of io scheduler tunables associated with it. These -tunables control how the io scheduler works. You can find these entries -in: - -/sys/block/<device>/queue/iosched - -assuming that you have sysfs mounted on /sys. If you don't have sysfs mounted, -you can do so by typing: - -# mount none /sys -t sysfs - -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: - -echo SCHEDNAME > /sys/block/DEV/queue/scheduler - -where SCHEDNAME is the name of a defined IO scheduler, and DEV is the -device name (hda, hdb, sga, or whatever you happen to have). - -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/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 |