Re: [Xen-devel] xen-unstable HV fails to boot on AMD quad core

["Daniel P. Berrange" <berrange@xxxxxxxxxx>]

On Fri, Oct 19, 2007 at 04:31:09PM +0100, Daniel P. Berrange wrote:
> I'm attempting to do some testing with xen-unstable but am unable to get
> the hypervisor to boot. With both xen-unstable 16125, and staging 16142
> the HV appears to immediately hang at boot time. No console output is
> displayed at all.
> 
> If I go back to 16000, then the console stays black for approx 10 seconds
> before Xen HV boots. This is on a single CPU, Quad Core AMD host.

So, I found that the problem hits in changeset 16104.  Prior to that changeset
it will always boot, post that changeset it hangs immediately.  NB, when I
tested with 16103 I had pulled in the compile fix from 16105 only.

Further, it only appears to have trouble on this one machine. Another AMD
dual core host works fine, as does an Intel box I tried. 

As for the 10 second pause, I'm putting that down to a BIOS bug, since other
machines don't exhibit that.

Regards,
Dan.
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