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Re: [Xen-devel] [PATCH] qemu-xen-3.4-testing: Fix read-only image file h

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] [PATCH] qemu-xen-3.4-testing: Fix read-only image file handling
From: Michal Novotny <minovotn@xxxxxxxxxx>
Date: Mon, 07 Jun 2010 17:02:40 +0200
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On 06/07/2010 04:56 PM, Pasi Kärkkäinen wrote:
On Mon, Jun 07, 2010 at 03:36:44PM +0200, Michal Novotny wrote:
Well,
it doesn't seem to be that easy because I can't boot any of the guests.
No matter whether HVM or PV.

For PV it's connected with the hotplugging:

# xm create rhel5-32pv
Using config file "./rhel5-32pv".
Error: Device 0 (vif) could not be connected. Hotplug scripts not working.

Do you have correct bridge= specified for the vif? Does the bridge exist?


Yeah, everything is specified like it was and the bridge exists.

For HVM guests it's:

# xm create rhel5-32fv
Using config file "./rhel5-32fv".
Error: Not enough memory is available, and dom0 cannot be shrunk any further

Do you have dom0_mem=1024M for xen.gz in grub.conf ?
You should limit/dedicate some memory for only dom0 and thus prevent the need 
for ballooning.



 No, I'm not having dom0_mem here at all.

and also the xend.log fragment relevant to the issue:


For PV guests there was a change of blktap to blktap2. Couldn't this be
related? How could I check I'm using the blktap2 ? Also, my test machine
is Intel Xeon X5460 @ 3.16 Ghz, quad-core with 8 GiB RAM running on
RHEL-5 with upstream 4.1 xen.

Try first using just file:// if using image files, or phy: if using lvm volumes.

-- Pasi



Ok, I'm using image files. Unfortunately it's not working after reboot so it's pretty bad now.

Michal
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--
Michal Novotny<minovotn@xxxxxxxxxx>, RHCE
Virtualization Team (xen userspace), Red Hat


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