[Qemu-devel] Re: qemu-kvm segfaults in qemu_del_timer (0.10.5 and 0.10.6)

[Avi Kivity <avi@redhat.com>]

On 08/12/2009 06:01 PM, Chris Webb wrote:
> I have a couple of clusters hosting qemu-kvm virtual machines. One of these
> clusters consists of dual quad-core Xeon E5420s (vmx), the other consists of
> dual quad-core Barcelona Opterons (svm), and both are running x86-64 Linux
> 2.6.30.4 with the kvm modules included with the upstream kernel compiled in.
>
> Running qemu-kvm 0.10.5, I was seeing occasional segfaults from the virtual
> machines, perhaps two or three a day across each cluster. The guest OS didn't
> appear to be a factor, as both Linux and Windows VMs have crashed. I then
> switched to the recently released qemu-kvm 0.10.6, and am still seeing these
> segfaults.
>
> It's very hard for me to arrange for core dumps on these live clusters, and the
> segfaults are hard to reproduce on test machines because they are rare.
> However, I have unstripped copies of the respective binaries and have used gdb
> to translate the segfault ip into a source file and line number, which I hope
> might be useful. On both clusters and for each version of qemu-kvm, segfaults
> are happening at lines #1161 and #1163 of vl.c:
>    

I understand it's hard, but it's nearly impossible to work out the 
problem from so little data, so please do make the effort to obtain dumps.

-- 
error compiling committee.c: too many arguments to function