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

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Date:	Mon, 20 Jun 2011 22:05:40 +0200
From:	Jens Axboe <jaxboe@...ionio.com>
To:	Justin TerAvest <teravest@...gle.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 2011-06-20 22:03, Justin TerAvest wrote:
> 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.

Great, right branch.

> 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.

Thanks!

-- 
Jens Axboe

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