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Re: [Xen-devel] [PATCH] libxl: use qemu-xen with PV guests by default

On Wed, 18 Apr 2012, Ian Campbell wrote:
> On Tue, 2012-04-17 at 18:17 +0100, Ian Jackson wrote:
> > Stefano Stabellini writes ("[Xen-devel] [PATCH] libxl: use qemu-xen with PV 
> > guests by default"):
> > > qemu-xen offers better disk performances than qemu-xen-traditional
> > > because it supports Linux native AIO.
> > 
> > Does this take any account of whether the new qemu-xen dm is
> > installed ?
> I don't think it is possible to install xen-unstable without
> qemu-upstream-xen getting built and installed? At least not building
> from source, perhaps a distro might package them separately but there
> really ought to be a depends relationship in that case?

I would think so.

> Would we want to
> support a Xen without qemu-upstream-xen configuration?

What if we check for the existence of the file in libxl?

If this is not acceptable I vote for assuming that qemu-xen is installed
in the system.

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