Re: [Qemu-devel] unable to boot systemrescuecd with tcg only?

[Aurelien Jarno <aurelien@aurel32.net>]

On Tue, Apr 16, 2013 at 12:03:10AM +0200, Aurelien Jarno wrote:
> On Tue, Apr 16, 2013 at 12:36:36AM +0300, Michael S. Tsirkin wrote:
> > On Mon, Apr 15, 2013 at 06:17:18PM +0200, Paolo Bonzini wrote:
> > > Il 15/04/2013 17:02, Paolo Bonzini ha scritto:
> > > > Il 15/04/2013 11:18, Michael S. Tsirkin ha scritto:
> > > >> On Mon, Apr 15, 2013 at 11:53:12AM +0300, Michael S. Tsirkin wrote:
> > > >>> Get system rescue CD version 2.8.0 here:
> > > >>> http://www.sysresccd.org/Sysresccd-versions
> > > >>>
> > > >>> Verify md5 checksum: 450305b2c3ac12d5c97ff849ca178586
> > > >>
> > > >> Note: tried version 2.1.0, that boots fine.
> > > >> Tried version 3.5.0, that hangs on boot
> > > >> (or maybe it's just too slow? gave up after 15 min).
> > > >> In all cases -enable-kvm makes it work fine.
> > > > 
> > > > Reproduced it too (by chance :)) with Fedora 16.  Trying to bisect now.
> > > 
> > > Hmm, no, must be a different thing.  It was in a "seemingly innocuous"
> > > patch at the top of my tree, and system rescue CD works for me.
> > 
> > 2.0.8?
> > 
> > Hmm maybe the issue is I'm on a 32 bit host ...
> > 
> 
> It's an important information. With it I am able to reproduce the issue.
> 

I have bisected the issue to:

| f437d0a3c24e471a855da33a086fe529e09a06af is the first bad commit
| commit f437d0a3c24e471a855da33a086fe529e09a06af
| Author: Richard Henderson <rth@twiddle.net>
| Date:   Tue Feb 19 21:06:31 2013 -0800
| 
|     target-i386: Use movcond to implement shiftd.
| 
|     With this being all straight-line code, it can get deleted
|     when the cc variables die.
| 
|     Signed-off-by: Richard Henderson <rth@twiddle.net>

-- 
Aurelien Jarno                          GPG: 1024D/F1BCDB73
aurelien@aurel32.net                 http://www.aurel32.net