From: Michael Vrable <mvrable@cs.ucsd.edu>
To: xen-devel@lists.xensource.com
Subject: Re: Re: [PATCH] Xen Guest Kexec
Date: Mon, 6 Mar 2006 08:04:19 -0800 [thread overview]
Message-ID: <20060306160419.GA4015@vrable.net> (raw)
In-Reply-To: <440C43E4.1050204@suse.de>
On Mon, Mar 06, 2006 at 03:15:00PM +0100, Gerd Hoffmann wrote:
> * Which events can change the p2m map? I think for domU that is only
> ballooning, right? For dom0 additionally the backend drivers (when
> mapping foreign pages). Anything else?
Networking as well, since network packet reception involves flipping
pages between domains.
> * Is there some way to rebuild the p2m map from scratch using
> hypercalls?
As far as I know not completely reliably, since the P2M map is
maintained by the guest and Xen is almost entirely uninvolved.
You could probably get most of the way there by retrieving a list of
pages belonging to the guest (not sure if this can be done from within
an unprivileged guest though, or only in Domain-0), then building a
reverse map of entries in the M2P table. This will only work if all
pages have accurate M2P entries (certainly won't work for domain-0,
since it maps foreign pages, but might work for unprivileged domains).
--Michael Vrable
next prev parent reply other threads:[~2006-03-06 16:04 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-26 22:49 Re: [PATCH] Xen Guest Kexec Ian Pratt
2006-02-27 7:10 ` Keir Fraser
2006-02-27 15:34 ` Gerd Hoffmann
2006-02-27 16:19 ` Keir Fraser
2006-03-01 12:09 ` Gerd Hoffmann
2006-03-01 14:10 ` Gerd Hoffmann
2006-03-01 15:03 ` Keir Fraser
2006-03-01 17:35 ` Keir Fraser
2006-03-02 9:16 ` Gerd Hoffmann
2006-03-02 9:43 ` Keir Fraser
2006-03-02 11:34 ` Gerd Hoffmann
2006-03-02 11:55 ` Keir Fraser
2006-03-02 16:36 ` Gerd Hoffmann
2006-03-02 16:48 ` Keir Fraser
2006-03-03 8:39 ` Gerd Hoffmann
2006-03-03 9:14 ` Keir Fraser
2006-03-03 9:35 ` Keir Fraser
2006-03-03 11:19 ` Gerd Hoffmann
2006-03-06 14:15 ` Gerd Hoffmann
2006-03-06 16:04 ` Michael Vrable [this message]
2006-03-07 13:06 ` Gerd Hoffmann
2006-03-07 13:42 ` Keir Fraser
2006-03-07 14:43 ` Gerd Hoffmann
-- strict thread matches above, loose matches on Subject: below --
2005-07-07 17:16 Mark Williamson
2006-02-23 10:52 ` Horms
2006-02-23 11:22 ` Gerd Hoffmann
2006-02-23 11:32 ` Mark Williamson
2006-02-23 13:03 ` Gerd Hoffmann
2006-02-23 14:49 ` Mark Williamson
2006-02-24 14:35 ` Gerd Hoffmann
2006-02-27 14:29 ` Mark Williamson
2006-02-27 15:39 ` Gerd Hoffmann
2006-02-23 11:36 ` Mark Williamson
2006-02-27 3:32 ` Horms
2006-02-27 14:58 ` Mark Williamson
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