Comment 20 for bug 333201

10.04.01 Guests built on 9.10 hosts using vmbuilder=0.12.4-0ubuntu1 (from maverick, I had issues with 0.12.3-0ubuntu1, I see there is a newer version in -proposed) still present soft lock ups. It's only one type of server, and tends to not be purely CPU driven although the guests with higher load do present much more often.

Has anyone tried this with a 10.04 (lucid) host or at least kvm=1:84+dfsg-0ubuntu16+0.12.3+noroms+0ubuntu9 backported to 9.10 (karmic)?

I can't imagine it would be vmbuilder or JeOS, as the former is mostly a convenience script around deb-bootstrap, libvirt, and such. The latter shouldn't be able to have any essential packages missing because by way of the way it is built, dependencies would be enforced. Thus toolchain issues _should_ effect a greater number of people.

I'm going back to betting on KVM or the kernel. I'll try to narrow it down more, as this is effecting my production systems gravely now.