linux-kernel - Re: [PATCH V2 2/2] blk-mq: immediately dispatch big size request

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Message-ID: <20161104001353.GA58908@omida-mbp.local.dhcp.thefacebook.com>
Date:   Thu, 3 Nov 2016 17:13:54 -0700
From:   Shaohua Li <shli@...com>
To:     Christoph Hellwig <hch@...radead.org>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <Kernel-team@...com>, <axboe@...com>
Subject: Re: [PATCH V2 2/2] blk-mq: immediately dispatch big size request

On Thu, Nov 03, 2016 at 05:09:54PM -0700, Christoph Hellwig wrote:
> On Thu, Nov 03, 2016 at 05:03:54PM -0700, Shaohua Li wrote:
> > This is corresponding part for blk-mq. Disk with multiple hardware
> > queues doesn't need this as we only hold 1 request at most.
> 
> Any reason you only do this for the SQ and not the MQ case?

Right above:
Disk with multiple hardware queues doesn't need this as we only hold 1
request at most.

Thanks,
Shaohua