Re: [PATCH] Give kjournald a IOPRIO_CLASS_RT io priority

From: Andi Kleen
Date: Thu Oct 02 2008 - 02:57:39 EST


Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> writes:

> On Wed, 1 Oct 2008 20:00:34 -0700 Arjan van de Ven <arjan@xxxxxxxxxxxxx> 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

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