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Date: Mon, 12 May 2014 09:24:52 +0200
From: Thomas Huth <thuth@linux.vnet.ibm.com>
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Subject: Re: [Qemu-devel] My OS hangup in KVM for some reasons,
 how can I debug?
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To: Jun Koi <junkoi2004@gmail.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

On Sun, 11 May 2014 21:09:44 +0800
Jun Koi <junkoi2004@gmail.com> wrote:

> On Fri, May 9, 2014 at 11:24 AM, Jun Koi <junkoi2004@gmail.com> wrote:
> 
> >
> >
> >
> > On Thu, May 8, 2014 at 4:28 PM, Jun Koi <junkoi2004@gmail.com> wrote:
> >
> >> Hi,
> >>
> >> I have an weird OS that I am trying to boot in KVM. however, it just hang
> >> in the middle, without a good reason.
> >>
> >> The same OS boots fine in physical machine, and this OS comes with no
> >> source code.
> >>
> >> There must be a bug somewhere in KVM, so I am wondering how people debug
> >> deal with such a case to find and fix bugs in KVM?
> >>
> >> Same thing like this happened before with some new OSes (such as Windows
> >> 8), and somebody always came up with a quick fix, so I am wondering what
> >> the magic is here.
> >>
> >>
> >
> Any help, please?

You could try to attach a GDB to see where it is hanging (start qemu
with the -s option, see http://wiki.qemu.org/Documentation/Debugging).

 Thomas