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 [thread overview]
Message-ID: <1D08B61A9CF0974AA09887BE32D889DA12EC99@ULS-OP-MBXIP03.sdcorp.global.sandisk.com> (raw)
In-Reply-To: 9a2b8d7e-1b04-4c94-2c79-c16fa8134f9d@kernel.dk
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=
=0A=
> will set the BLK_MQ_F_BLOCKING flag, indicating that it sometimes/always=
=0A=
> needs to block in its ->queue_rq() function. The intent is to help find=
=0A=
> 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=
=0A=
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>=0A=
prev parent reply other threads:[~2017-03-30 19:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-30 18:53 null_blk: add blocking mode Jens Axboe
2017-03-30 19:33 ` Bart Van Assche [this message]
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