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From: Jens Axboe <>
Subject: Re: [PATCH] Block SQ/MQ Request Priority
Date: Tue, 4 Apr 2017 15:40:27 -0600	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On 04/04/2017 09:25 AM, wrote:
> From: Adam Manzanares <>
> In 4.10 I introduced a patch that associates the ioc priority with
> each request in the block layer. This work was done in the single queue
> block layer code. This patch unifies ioc priority to request mapping across
> the single/multi queue block layers.
> I have tested this patch with the null block device driver with the following
> parameters.
> null_blk queue_mode=2 irqmode=0 use_per_node_hctx=1 nr_devices=1
> I have not seen a performance regression with this patch and I would appreciate
> any feedback or additional testing.
> I have also verified that io priorities are passed to the device when using
> the SQ and MQ path to a SATA HDD that supports io priorities.

Applied, with an updated subject line, it didn't really describe what
the patch does. Thanks.

Jens Axboe

      parent reply	other threads:[~2017-04-04 21:40 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-04 15:25 adam.manzanares
2017-04-04 15:25 ` adam.manzanares
2017-04-04 15:31 ` Bart Van Assche
2017-04-04 15:31   ` Bart Van Assche
2017-04-04 21:40 ` Jens Axboe [this message]

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