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Re: [Xen-devel] Hosting xenstore in a separate domain

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Hosting xenstore in a separate domain
From: Alex Zeffertt <alex.zeffertt@xxxxxxxxxxxxx>
Date: Mon, 15 Jun 2009 12:10:56 +0100
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Yes. You only need a patched kernel if you uncomment the '#STUBDOM=yes' line in /etc/sysconfig/xenstore. By default xenstore stubdoms are not enabled, and you get a dom0 daemon that works equally well with a patched kernel or an unpatched kernel.

Regards,

Alex

Keir Fraser wrote:
Just to check, your tools patches are backwards compatible with old dom0
kernels when running xenstored in dom0?

 -- Keir

On 15/06/2009 10:06, "Alex Zeffertt" <Alex.Zeffertt@xxxxxxxxxxxxx> wrote:

Please note that these xen-unstable patches depend on some minor dom0 kernel
patches (*).  I updated Diego's linux-2.6.18-xen.hg patches and posted them to
this list.  But if you're using an alternate dom0 kernel you'll need to
forward port these.

Regards,

Alex

(*) The kernel patches provide an ioctl for the xenstore domain builder to
create a grant ref and event chan which enables the xenstore domain to access
dom0's xenstore page.

Keir Fraser wrote:
There are pending patches for this from Diego Ongaro and Alex Zeffert.
Should be in xen-unstable pretty soon now.

 -- Keir

On 11/06/2009 23:07, "Adam McKibben" <adam.mckibben@xxxxxxxxxx> wrote:

I've noticed a few projects aimed at dis-aggregating dom0 (stubdom and
Derek Murray's project to move the domain builder to its own domain).

Has anyone tried to host xenstore in a domain other than Dom0?

What difficulties might such a project encounter?


Thanks


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