On Thu, Mar 17, 2016 at 10:01:38PM +0100, Thomas Gleixner wrote: > I tried to reproduce with Richards script, but so far no dice. Can you please > provide your kernel config? Attached. For reproducing the problem, I found it helps to have some heavy CPU and/or disk activity going on alongside the test. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v