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null_blk: add usage hints for no_sched 

This parameter provide an option to disable io scheduler when nullb*
in multi-queue mode.

Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
hifive-unleashed-5.1
weiping zhang 2017-10-14 00:26:54 +08:00 committed by Jens Axboe
parent 23c4490d2b
commit fc186311f2
1 changed files with 4 additions and 0 deletions
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4
Documentation/block/null_blk.txt
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@ -73,3 +73,7 @@ use_per_node_hctx=[0/1]: Default: 0
use_lightnvm=[0/1]: Default: 0
Register device with LightNVM. Requires blk-mq and CONFIG_NVM to be enabled.
no_sched=[0/1]: Default: 0
0: nullb* use default blk-mq io scheduler.
1: nullb* doesn't use io scheduler.