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Date: Mon, 25 May 2009 15:00:34 +0200
From: Christoph Hellwig <hch@lst.de>
Subject: Re: [Qemu-devel] Do we need CONFIG_AIO?
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To: Samuel Thibault <samuel.thibault@gnu.org>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, Christoph Hellwig <hch@lst.de>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>

On Mon, May 25, 2009 at 02:58:52PM +0200, Samuel Thibault wrote:
> qemu on MiniOS is used to provide efficient full virtualisation, so yes
> it's performance sensitive, but for performances we use a block-vbd
> interface. Keeping the block-posix interface for non-performance
> critical resources that can not go through vbd is still important, so we
> need to be able to compile it.

Apparently all this is not in upstream qemu, right?  I really don't see
the reason to keep all this stuff around for out of tree bits only
given it is a significant burden.