Re: [Qemu-devel] qemu-kvm-1.0 crashes with threaded vnc server?

[Peter Lieven]

Am 11.02.2012 um 09:55 schrieb Corentin Chary:

> On Thu, Feb 9, 2012 at 7:08 PM, Peter Lieven <address@hidden> 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,

Hi Corentin,

thanks for rebasing those patches. I remember that I have seen them the
last time I noticed (about 1 year ago) that the threaded VNC is crashing.
I'm on vacation this week, but I will test them next week 
and let you know if I can force a crash with them applied. If not we should
consider to include them asap.

Peter


> 
> 
> -- 
> Corentin Chary
> http://xf.iksaif.net