Re: [PATCH] scsi: scsi_debug: introduce module parameter of 'use_blk_mq'

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To: Ming Lei <ming.lei@xxxxxxxxxx>
Subject: Re: [PATCH] scsi: scsi_debug: introduce module parameter of 'use_blk_mq'
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Mon, 2 Jul 2018 05:54:22 -0700
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, linux-scsi@xxxxxxxxxxxxxxx, "Martin K . Petersen" <martin.petersen@xxxxxxxxxx>, linux-block@xxxxxxxxxxxxxxx, Douglas Gilbert <dgilbert@xxxxxxxxxxxx>, Bart Van Assche <bart.vanassche@xxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Omar Sandoval <osandov@xxxxxx>
In-reply-to: <20180702050642.26265-1-ming.lei@redhat.com>
References: <20180702050642.26265-1-ming.lei@redhat.com>
User-agent: Mutt/1.9.2 (2017-12-15)

On Mon, Jul 02, 2018 at 01:06:42PM +0800, Ming Lei wrote:
> With the introduced module parameter of 'use_blk_mq', it is easy
> to switch between 'blk_mq' and 'non_blk_mq' by reloading scsi_debug
> module, so that we can test scsi_mq/blk_mq related regressions easily.

No.  We should not make a per driver choice.

Follow-Ups:
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  - From: Ming Lei
- Re: [PATCH] scsi: scsi_debug: introduce module parameter of 'use_blk_mq'
  - From: Johannes Thumshirn

References:
- [PATCH] scsi: scsi_debug: introduce module parameter of 'use_blk_mq'
  - From: Ming Lei

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