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

[Richard Henderson <rth@twiddle.net>]

On 2013-04-16 00:32, Aurelien Jarno wrote:
> 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>
>

Ah.  I'll see what I can do.  Downloading 350M might not be possible while I'm 
traveling though, so any help producing a reduced test case would be appreciated.


r~