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Date: Fri, 9 Apr 2010 15:09:09 -0300
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: [Qemu-devel] Weird thing happen when the VM is stop! (0.12.3)
Message-ID: <20100409180909.GA16476@amt.cnet>
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To: Jun Koi <junkoi2004@gmail.com>
Cc: pbonzini@redhat.com, qemu-devel@nongnu.org, Luiz Capitulino <lcapitulino@redhat.com>

On Sat, Apr 10, 2010 at 01:12:27AM +0900, Jun Koi wrote:
> On Fri, Apr 9, 2010 at 10:20 PM, Luiz Capitulino <lcapitulino@redhat.co=
m> wrote:
> > On Fri, 9 Apr 2010 18:32:21 +0900
> > Jun Koi <junkoi2004@gmail.com> wrote:
> >
> >> Hi,
> >>
> >> I found something very funny happening with 0.12.3: it seems the VM =
is
> >> still running even I already stopped it.
> >>
> >> Here is how I verified that: Boot any OS (I checked with Windows XP
> >> and Ubuntu) with 0.12.3, and stop it any time after it booted up. Us=
e
> >> "stop" command on monitor interface.
> >>
> >> Now the VM stops. Then in the same monitor interface, run "info
> >> registers" again and again. You can see that the value of EIP and
> >> EFLAGS still change once in a while. This should not happen, becaues
> >> the VM already stopped.
> >>
> >> I checked, and dont see this problem with 0.11.1. And this doesnt
> >> happen with the latest code in the git tree, either.
> >>
> >> Any idea on why this happens???
> >
> > =A0Can you try commit 55274a305 ? If it fixes the problem we need it
> > in stable, if it doesn't you can try to find the fix by using git bis=
ect.
> >
>=20
> This hint makes sense, but the point is that I tried with some commits
> before that 55274a305, and didnt see the problem. Still I am not sure
> the problem is already fixed before 55274a305, or I am just unlucky
> enough not see the problem when testing.
>=20
> After bisecting, I can say that the culprit is the below patch, from Ma=
rcelo.
>=20
> Now I am wondering if the above commit 55274a305 of Paolo Bonzini
> fixed the bug, or other commit before that?? We should find the
> correct fix, and port it to 0.12.4.

Guess its c5f32c99. Can you confirm please?