linux-kernel - Re: [PATCH] Give kjournald a IOPRIO_CLASS

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Message-ID: <87fxnfpjqj.fsf@basil.nowhere.org>
Date:	Thu, 02 Oct 2008 08:57:24 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	linux-kernel@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH] Give kjournald a IOPRIO_CLASS_RT io priority

Andrew Morton <akpm@...ux-foundation.org> writes:

> On Wed, 1 Oct 2008 20:00:34 -0700 Arjan van de Ven <arjan@...radead.org> wrote:
>
>> Subject: [PATCH] Give kjournald a IOPRIO_CLASS_RT io priority
>
> You proposed this a while back and it didn't happen and I forget
> why and the changelog doesn't mention any of that?

XFS tried this some time ago too.

I think the issue was that real user supplied RT applications don't want to 
compete with a "pseudo RT" kjournald.

So it would really need a new priority class between RT and normal priority.

-Andi

-- 
ak@...ux.intel.com
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