linux-kernel - Re: [PATCH] cfq: Remove special treatment for metadata rqs.

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Message-ID: <BANLkTin6yt5PCG1uOamGiGjU++tznQNkAcdTGfNDOhLQvU-1=g@mail.gmail.com>
Date:	Mon, 20 Jun 2011 13:03:34 -0700
From:	Justin TerAvest <teravest@...gle.com>
To:	Jens Axboe <jaxboe@...ionio.com>
Cc:	"vgoyal@...hat.com" <vgoyal@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"hch@...radead.org" <hch@...radead.org>
Subject: Re: [PATCH] cfq: Remove special treatment for metadata rqs.

On Mon, Jun 20, 2011 at 12:59 PM, Jens Axboe <jaxboe@...ionio.com> wrote:
> On 2011-06-20 21:52, Justin TerAvest wrote:
>> There is no consistency among filesystems from what bios (or requests)
>> are marked as being metadata. It's interesting to expose this in traces,
>> but we shouldn't schedule the requests differently based on whether or
>> not they're marked as being metadata.
>
> Agree, we should kill that. What is this patch against? cfq_choose_req()
> also has a "choose meta over non-meta" preference.

This is against for-3.1. Let me know if you want it against something else.

Sorry, I missed the preference in cfq_choose_req, since it changed to
be clever about bit operations. I'll send a v2 patch that cleans that
use up as well.

>
> --
> Jens Axboe
>
>
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