Re: Regarding dm-ioband tests

From: Rik van Riel
Date: Mon Sep 07 2009 - 09:54:42 EST

Ryo Tsuruta wrote:

However, if you want to get fairness in a case like this, a new
bandwidth control policy which controls accurately according to
assigned weights can be added to dm-ioband.

Are you saying that dm-ioband is purposely unfair,
until a certain load level is reached?

We regarded reducing throughput loss rather than reducing duration
as the design of dm-ioband. Of course, it is possible to make a new
policy which reduces duration.

... while also reducing overall system throughput
by design?

Why are you even bothering to submit this to the
linux-kernel mailing list, when there is a codebase
available that has no throughput or fairness regressions?
(Vivek's io scheduler based io controler)

All rights reversed.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at