Re: [Qemu-devel] [Bug 1179219] Re: segfault in alloc_refcount_block

2013-05-15 Thread Brian J. Murrell
On 13-05-15 04:45 AM, Stefan Hajnoczi wrote: > > $ qemu-img create -f qcow2 -b template.img vm001.qcow2 > $ qemu-img create -f qcow2 -b template.img vm002.qcow2 > $ qemu-img create -f qcow2 -b template.img vm003.qcow2 > $ ...launch vm001-vm002... > > This is safe. Yes. This is exactly what I di

Re: [Qemu-devel] [Bug 1179219] Re: segfault in alloc_refcount_block

2013-05-12 Thread Brian J. Murrell
On 13-05-12 05:14 PM, Michael Tokarev wrote: > First, having a single qcow2 file open for read-write access by more > than one process in unsupported. But I don't, if I understand how qcow2 snapshots work. Let me apologize if I was not clear. Each of the VMs have their own snapshot of the common

[Qemu-devel] [Bug 1179219] [NEW] segfault in alloc_refcount_block

2013-05-12 Thread Brian J. Murrell
Public bug reported: On CentOS-6.4.latest, I am trying to run several KVM VMs with snapshots of a single qcow2 image. Randomly some VMs will crash though. There's a downstream bug report at http://bugs.centos.org/view.php?id=6441 and included in that is an "abrt" crash report that contains the f