From mboxrd@z Thu Jan  1 00:00:00 1970
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From: Bart Van Assche <Bart.VanAssche@sandisk.com>
To: Jens Axboe <axboe@kernel.dk>, "linux-block@vger.kernel.org"
	<linux-block@vger.kernel.org>
CC: Christoph Hellwig <hch@lst.de>
Subject: Re: null_blk: add blocking mode
Date: Thu, 30 Mar 2017 19:33:22 +0000
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On 03/30/2017 11:53 AM, Jens Axboe wrote:=0A=
> This adds a new module parameter to null_blk, blocking. If set, null_blk=
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> will set the BLK_MQ_F_BLOCKING flag, indicating that it sometimes/always=
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> needs to block in its ->queue_rq() function.  The intent is to help find=
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> regressions in blocking drivers, since not many of them exist.=0A=
> =0A=
> If null_blk is loaded with submit_queues > 1 and blocking=3D1, this=0A=
> shows the regression recently fixed by bf4907c05e61.=0A=
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Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>=0A=