linux-kernel - Re: [PATCH 0/3] cfq-iosched: Fair cross-group preemption

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Message-ID: <AANLkTinwmTjD-Q19U5nCPvoqN2DYGwtLDgeR8h39uWCX@mail.gmail.com>
Date:	Mon, 28 Mar 2011 09:59:54 -0700
From:	Chad Talbott <ctalbott@...gle.com>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Gui Jianfeng <guijianfeng@...fujitsu.com>, jaxboe@...ionio.com,
	linux-kernel@...r.kernel.org, mrubin@...gle.com,
	teravest@...gle.com
Subject: Re: [PATCH 0/3] cfq-iosched: Fair cross-group preemption

On Mon, Mar 28, 2011 at 6:15 AM, Vivek Goyal <vgoyal@...hat.com> wrote:
> On Fri, Mar 25, 2011 at 04:53:13PM -0700, Chad Talbott wrote:
>> Also, we'll soon be working to adopt the hierarchy series, and we'll
>> likely revisit using an RT service tree there.  It's difficult to
>> justify introducing RT service tree before those patches arrive.
>
> So once you move to hierachicy series, will be you using RT class and
> use throttling and abandon this functionality?

I'll certainly investigate using RT class and throttling, but it's too
early to know.  It's a known change in behavior, so it will need
testing (as well as the user-space work to handle the different
interface).

Chad
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