[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH] Extboot support for Xen

On Tue, Jan 15, 2008 at 02:02:24PM -0600, Anthony Liguori wrote:
> This patch adds extboot to Xen.  It should be pretty harmless as the moment
> because it's never enabled.  extboot allows arbitrary block devices to 
> be used
> to boot guests including SCSI and PV disks.  I've tested it with both 
> Windows
> and Linux guests in QEMU.
> The version of QEMU in Xen is a bit old so I couldn't complete the plumbing.
> The main problem is that Xen provides no way of exposing SCSI disks 
> right now
> and PV disks aren't actually accessible within QEMU.  I'm hoping someone 
> else
> can pick that up though as I'm pretty overcommitted at the moment.  The
> extboot infrastructure is there though so it's just a matter of 
> initializing it
> with the appropriate BlockDriverState.

We really badly need the '-drive' patch from QEMU 0.9.1 in Xen. We currently
hack this horribly by passing disks via xenstore, while all other args to
QEMU are regular command line args. If we had the -drive patch another large
chunk of Xen specific patches would go away which has to be a good thing.

If there aren't already plans to rebase to QEMU 0.9.1 in Xen 3.3.x series
I'd recommend back-porting the '-drive' patch to Xen's QEMU 0.9.0

|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
|=-  GnuPG: 7D3B9505   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=| 

Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.