[libvirt] Easy reproducer for multiple races and segfaults in libvirtd

[Richard W.M. Jones]

On Fri, Nov 16, 2012 at 02:40:31PM +0000, Daniel P. Berrange wrote:
> On Fri, Nov 16, 2012 at 02:16:04PM +0000, Richard W.M. Jones wrote:
> > 
> > You need to read the instructions at the top, and download the
> > following appliance too:
> > 
> > http://libguestfs.org/download/binaries/appliance/appliance-1.18.9.tar.xz
> > 
> > So far I've filed the following bugs:
> > 
> > https://bugzilla.redhat.com/show_bug.cgi?id=875741
> > https://bugzilla.redhat.com/show_bug.cgi?id=877110
> > https://bugzilla.redhat.com/show_bug.cgi?id=877312
> > https://bugzilla.redhat.com/show_bug.cgi?id=877429
> > https://bugzilla.redhat.com/show_bug.cgi?id=877430
> 
> Thanks for the reproducer program, that should make life much easier.
> 
> Just to confirm, you're seeing these problems on both 1.0.0 and
> current GIT master ?

Actually I'm testing libvirt-0.10.2.1-2.fc18.x86_64 & libvirt from
git, and seeing roughly the same set of problems with both.  Didn't
try 1.0.0 at all.

To use libvirt from git, I'm doing:

  killall libvirtd lt-libvirtd
  ~/d/libvirt/run ./test-parallel 

Plus I should note a few things about my environment:

 - Fedora 18

 - 16 GB of RAM (if you don't have that, reduce NR_THREADS in the test)

 - baremetal with KVM on a very fast Intel Sandybridge
   (I doubt this is reproducible in a VM)

 - I've configured core_pattern and ulimit to capture coredumps in /tmp

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines.  Supports shell scripting,
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