Re: [PATCH] CFQ scheduler, #2

From: Ed Tomlinson (
Date: Fri Feb 14 2003 - 16:38:44 EST

Jens Axboe wrote:
> The version posted the other day did fair queueing of requests between
> processes, but it did not help to provide fair request allocation. This
> version does that too, results are rather remarkable. In addition, the
> following changes were made:

The numbers from the second message are nice - especially considering this
is only the second iteration...

A question about io priorities. I wonder if they could not be implemented
via a per pid cfq_quantum? If I am not missunderstanding things, a bigger
value here for a given process should mean that it gets a larger share of
the io bandwidth...

Ed Tomlinson

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