Re: qemu-kvm-1.0 crashes with threaded vnc server?

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On 13.03.2012, at 16:05, Corentin Chary wrote:

> On Tue, Mar 13, 2012 at 12:29 PM, Peter Lieven <pl@xxxxxxx> wrote:
>> On 11.02.2012 09:55, Corentin Chary wrote:
>>> 
>>> On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven<pl@xxxxxxx>  wrote:
>>>> 
>>>> Hi,
>>>> 
>>>> is anyone aware if there are still problems when enabling the threaded
>>>> vnc
>>>> server?
>>>> I saw some VMs crashing when using a qemu-kvm build with
>>>> --enable-vnc-thread.
>>>> 
>>>> qemu-kvm-1.0[22646]: segfault at 0 ip 00007fec1ca7ea0b sp
>>>> 00007fec19d056d0
>>>> error 6 in libz.so.1.2.3.3[7fec1ca75000+16000]
>>>> qemu-kvm-1.0[26056]: segfault at 7f06d8d6e010 ip 00007f06e0a30d71 sp
>>>> 00007f06df035748 error 6 in libc-2.11.1.so[7f06e09aa000+17a000]
>>>> 
>>>> I had no time to debug further. It seems to happen shortly after
>>>> migrating,
>>>> but thats uncertain. At least the segfault in libz seems to
>>>> give a hint to VNC since I cannot image of any other part of qemu-kvm
>>>> using
>>>> libz except for VNC server.
>>>> 
>>>> Thanks,
>>>> Peter
>>>> 
>>>> 
>>> Hi Peter,
>>> I found two patches on my git tree that I sent long ago but somehow
>>> get lost on the mailing list. I rebased the tree but did not have the
>>> time (yet) to test them.
>>> http://git.iksaif.net/?p=qemu.git;a=shortlog;h=refs/heads/wip
>>> Feel free to try them. If QEMU segfault again, please send a full gdb
>>> backtrace / valgrind trace / way to reproduce :).
>>> Thanks,
>>> 
>> I have seen no more crashes with these to patches applied. I would suggest
>> it would be good to push them to the master repository.
>> 
>> Thank you,
>> Peter
>> 
> 
> Ccing Alexander,

Ah, cool. Corentin, I think you're right now the closest thing we have to a maintainer for VNC. Could you please just send out a pull request for those?


Alex

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