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Commit 23c4490d authored by weiping zhang's avatar weiping zhang Committed by Jens Axboe
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null_blk: update usage hints for submit_queues 



update the range of submits_queues, and correct usage hints.

Signed-off-by: default avatarweiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent cdd094fd

Documentation/block/null_blk.txt

+3 −3
Original line number Diff line number Diff line
@@ -55,10 +55,10 @@ irqmode=[0-2]: Default: 1-Soft-irq 
completion_nsec=[ns]: Default: 10.000ns

  Combined with irqmode=2 (timer). The time each completion event must wait.



submit_queues=[0..nr_cpus]:

submit_queues=[1..nr_cpus]:

  The number of submission queues attached to the device driver. If unset, it

  defaults to 1 on single-queue and bio-based instances. For multi-queue,

  it is ignored when use_per_node_hctx module parameter is 1.

  defaults to 1. For multi-queue, it is ignored when use_per_node_hctx module

  parameter is 1.



hw_queue_depth=[0..qdepth]: Default: 64

  The hardware queue depth of the device.