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Re: [Xen-users] ubuntu kernels 2.6.39+ don't boot as hvm domU

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] ubuntu kernels 2.6.39+ don't boot as hvm domU
From: Heiko Wundram <modelnine@xxxxxxxxxxxxx>
Date: Fri, 10 Jun 2011 19:20:00 +0200
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Am 06.06.2011 17:00, schrieb Mark Dokter:
On 6/6/11 4:32 PM, Martins Lazdans wrote:
Try to wait at that point for some time. It should return to init
console. Maybe init is trying to boot non-existing/misconfigured device.


I left it over night, but there was still nothing. No change at the
console (serial, vnc) and no ping response.
I also tried the xen_emul_unplug=never kernel parameter because I
thought there might be an issue with the xen pv-hvm drivers, but that
wasn't the case.
I did not change anything but the kernel image with the result that
2.6.38 boots and 2.6.39 or 3.0rc1 do not.

Just to follow up on this: gentoo-patched 2.6.39 (and 2.6.39-r1) have the same behaviour, i.e. I can't get them to boot as PV-on-HVM-kernels with a configuration that works for 2.6.38.

The result I'm seeing is that the genkernel-generated ramdisk starts scanning for modules, but when reaching either uhci_ucd (to scan for), or dm-mirror/dm-snapshot (when usb is disabled), freezes at that point.

In the Dom0 I can see one CPU core of the DomU fully pegged, but other than that, the system becomes completely unresponsive.

If there's interest in the config, I can post that.

For now, I've stuck with 2.6.38.

--
--- Heiko.

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