[Qemu-devel] Apparent USB assignment issue on 1.1+

[Qemu-devel] Apparent USB assignment issue on 1.1+

[Michael Tokarev]

Hello.

This issue has been reported several times already,
but I can't reproduce it locally.  Gerd, can you
please take a look, maybe you may ask better
question to the OP(s) about what to try.

https://bugs.launchpad.net/qemu/+bug/1033727
http://bugs.debian.org/683983

Gerd, I tried to catch you on irc for several
days, but you appears to be a non-frequent
guest there these days... :)

Thanks,

/mjt

Re: [Qemu-devel] Apparent USB assignment issue on 1.1+

[Gerd Hoffmann]

On 08/16/12 09:45, Michael Tokarev wrote:
> Hello.
> 
> This issue has been reported several times already,
> but I can't reproduce it locally.  Gerd, can you
> please take a look, maybe you may ask better
> question to the OP(s) about what to try.
> 
> https://bugs.launchpad.net/qemu/+bug/1033727

http://patchwork.ozlabs.org/patch/176030/ could fix this.
If not: enable all usb_host_* tracepoints & send log.

> http://bugs.debian.org/683983

No idea, must be some QOM thingy.

cheers,
  Gerd

Re: [Qemu-devel] Apparent USB assignment issue on 1.1+

[Peter Maydell]

On 16 August 2012 09:14, Gerd Hoffmann <kraxel@redhat.com> wrote:
> On 08/16/12 09:45, Michael Tokarev wrote:
>> This issue has been reported several times already,
>> but I can't reproduce it locally.  Gerd, can you
>> please take a look, maybe you may ask better
>> question to the OP(s) about what to try.
>>
>> https://bugs.launchpad.net/qemu/+bug/1033727
>
> http://patchwork.ozlabs.org/patch/176030/ could fix this.
> If not: enable all usb_host_* tracepoints & send log.
>
>> http://bugs.debian.org/683983
>
> No idea, must be some QOM thingy.

The "crash on usb_del" problem has been discussed on the list
before, Paolo posted a sketch of a patch to fix this:
http://lists.gnu.org/archive/html/qemu-devel/2012-08/msg01357.html

I'd forgotten about the issue but I think we should definitely
fix for 1.2 if we can. Anthony -- does Paolo's patch look like
the right direction?

-- PMM

Re: [Qemu-devel] Apparent USB assignment issue on 1.1+

[Michael Tokarev]

On 16.08.2012 12:14, Gerd Hoffmann wrote:
> On 08/16/12 09:45, Michael Tokarev wrote:
>> Hello.
>>
>> This issue has been reported several times already,
>> but I can't reproduce it locally.  Gerd, can you
>> please take a look, maybe you may ask better
>> question to the OP(s) about what to try.
>>
>> https://bugs.launchpad.net/qemu/+bug/1033727
> 
> http://patchwork.ozlabs.org/patch/176030/ could fix this.

Interesting.

> If not: enable all usb_host_* tracepoints & send log.

Ok, will try to ping the OP... ;)

>> http://bugs.debian.org/683983
> 
> No idea, must be some QOM thingy.

There are two issues in there -- QOM (assertion failure)
is unrelated.  The main issue is that win BSODs when
trying to use the USB device, but it worked fine in 1.0.

I guess the only possible solution here is to try to
bisect it.  But it wont be easy due to other issues
between 1.0 and 1.1.


Overall, somehow I thought the two issues are related.
Now when I re-read it again, I don't see why I thought
so -- that's two different problems apparently.

Thank you!

/mjt

Re: [Qemu-devel] Apparent USB assignment issue on 1.1+

[Michael Tokarev]

On 16.08.2012 12:23, Peter Maydell wrote:
> On 16 August 2012 09:14, Gerd Hoffmann <kraxel@redhat.com> wrote:
[]
>>> http://bugs.debian.org/683983
>>
>> No idea, must be some QOM thingy.

This was http://bugs.debian.org/684282, unrelated to usb.

> The "crash on usb_del" problem has been discussed on the list
> before, Paolo posted a sketch of a patch to fix this:
> http://lists.gnu.org/archive/html/qemu-devel/2012-08/msg01357.html
> 
> I'd forgotten about the issue but I think we should definitely
> fix for 1.2 if we can. Anthony -- does Paolo's patch look like
> the right direction?

Yes, this definitely needs fixing for 1.2.  I too almost forgot
about that after applying Paolo's patch to debian package...

Thanks,

/mjt