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authorweiping zhang <zhangweiping@didichuxing.com>2017-10-14 00:26:54 +0800
committerJens Axboe <axboe@kernel.dk>2017-10-13 10:52:39 -0600
commitfc186311f2233bb3f69f22b96babdf16a57c88a9 (patch)
tree97adaec4c4f9229a959a4e262309ce5bbe5eeda0 /Documentation/block/null_blk.txt
parent23c4490d2b7f78a855f9c5675e26735fb61afe84 (diff)
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>
Diffstat (limited to 'Documentation/block/null_blk.txt')
-rw-r--r--Documentation/block/null_blk.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/block/null_blk.txt b/Documentation/block/null_blk.txt
index 1f8d92c70458..b7161c8e70f2 100644
--- a/Documentation/block/null_blk.txt
+++ b/Documentation/block/null_blk.txt
@@ -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.