linux-kernel - Re: [PATCH] virtio_blk: use noop elevator by default

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Message-Id: <1225100620.7370.77.camel@sebastian.kern.oss.ntt.co.jp>
Date:	Mon, 27 Oct 2008 18:43:40 +0900
From:	Fernando Luis Vázquez Cao 
	<fernando@....ntt.co.jp>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	rusty@...tcorp.com.au, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] virtio_blk: use noop elevator by default

On Tue, 2008-08-26 at 16:39 +0200, Jens Axboe wrote:
> On Tue, Aug 26 2008, Fernando Luis Vázquez Cao wrote:
> > Hi Rusty,
> > 
> > Would it make sense to use noop by default? After all we do not know
> > what is behind the backend driver and the hypervisor is likely to do its
> > own scheduling anyway. I guess this is the reason the Xen guys took this
> > approach.
> > 
> > What do you think about the patch below?
> 
> I plan to include some variant of disk profiling for 2.6.28 which will
> let eg CFQ turn off idling for such device types, I think that is a
> better solution.
Thank you for the advice. I will be sending patches that take advantage
of the profiling capability merged for 2.6.28.

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