Re: Switching to MQ by default may generate some bug reports

From: Mel Gorman
Date: Thu Aug 03 2017 - 06:47:08 EST

On Thu, Aug 03, 2017 at 11:44:06AM +0200, Paolo Valente wrote:
> > That series is dealing with problems with legacy-deadline vs mq-none where
> > as the bulk of the problems reported in this mail are related to
> > legacy-CFQ vs mq-BFQ.
> >
> Out-of-curiosity: you get no regression with mq-none or mq-deadline?

I didn't test mq-none as the underlying storage was not fast enough to
make a legacy-noop vs mq-none meaningful. legacy-deadline vs mq-deadline
did show small regressions on some workloads but not as dramatic and
small enough that it would go unmissed in some cases.

Mel Gorman