Hello all, I know that this question is beyond the scope of this ML, but maybe someone can help me. Recently I've started experiencing client hangs across the board on SMP CentOS 5.5/x86_64 clients running under a number of F13/x86_64 hosts when -smp is enabled [1]. Looking at the yum logs on both the hosts and the guest doesn't seem to point at any recent update that might have broken anything. As we use CentOS guests to test our application before pushing updates down to our RHEL servers, the lack of SMP support is very problematic. I did my best to generate an informative bug report, but I fear that lacking additional information, this bug report has little chance of getting solved within the F13 timeframe. So, how can determine if the problem is host based or guest based? (The CentOS 5.5/x86_64 guests were rock solid until ~2 weeks ago with smp=2 and up to smp=8) How can help the qemu maintainers triage this bug? - Gilboa [1] https://bugzilla.redhat.com/show_bug.cgi?id=619306