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

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

[Michael S. Tsirkin]

Get system rescue CD version 2.8.0 here:
http://www.sysresccd.org/Sysresccd-versions

Verify md5 checksum: 450305b2c3ac12d5c97ff849ca178586

Try to boot:

./x86_64-softmmu/qemu-system-x86_64  -net user -net nic -snapshot -cdrom \
~/images/systemrescuecd-x86-2.8.0.iso

Select option: all files cached to memory.

Error: XZ compressed data is corrupt.

Try version 1.2.2 (in F18)

qemu-system-x86_64  -net user -net nic -snapshot -cdrom \
~/images/systemrescuecd-x86-2.8.0.iso

Boots fine, gets to keyboard prompt.


Try with kvm:

./x86_64-softmmu/qemu-system-x86_64 -enable-kvm -net user -net nic -snapshot -cdrom \
~/images/systemrescuecd-x86-2.8.0.iso


Boots fine, gets to keyboard prompt.

Didn't try bisecting yet.

-- 
MST

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

[Michael S. Tsirkin]

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.

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

[Paolo Bonzini]

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.

Paolo

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

[Paolo Bonzini]

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.  No XZ
error and it boots fine in 3-4 minutes.

BTW, the cache option fails to cache things for me due to lack of memory
(requires 512M).  I also tried with "-m 1024", but it still succeeds.

Paolo

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

[Aurelien Jarno]

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.  No XZ
> error and it boots fine in 3-4 minutes.
> 
> BTW, the cache option fails to cache things for me due to lack of memory
> (requires 512M).  I also tried with "-m 1024", but it still succeeds.
> 

I am also not able to reproduce the problem, neither with 1.4.0 nor with
current master.

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

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

[Michael S. Tsirkin]

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 ...

>  No XZ
> error and it boots fine in 3-4 minutes.
> 
> BTW, the cache option fails to cache things for me due to lack of memory
> (requires 512M).  I also tried with "-m 1024", but it still succeeds.
> 
> Paolo

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

[Aurelien Jarno]

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.

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

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

[Aurelien Jarno]

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

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

[Richard Henderson]

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~

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

[Aurelien Jarno]

On Wed, Apr 17, 2013 at 09:37:54AM +0200, Richard Henderson wrote:
> 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.
> 

I'll try to work on that. For now I have determined the problem is on
the gen_shiftd_rm_T1 side, the gen_shift_rm_T1 part is fine (at least
it's not the one triggering the issue).

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