Hi All, I'm cross-posting this from Reddit qemu_kvm, in case it helps in some way. I know my setup is ancient and unique; let me know if you would like more info.
Symptoms: 1. Ubuntu10.04 32-bit guest locks up randomly between 0 and 30 days. 2. The console shows a CPU trace dump, nothing else logged on the guest or host. 3. Host system (Ubuntu20.04) 100% CPU for qemu process. Solution: When using virt-install, always use the "--os-variant" parameter! e.g. --os-variant ubuntu10.04 >From the man page "--os-variant... Optimize the guest configuration for a specific operating system". In this case, "optimize" apparently means "stop the crashing". I was deliberately avoiding the option because the VM was already performing much better than expected and I didn't want to complicate the configuration. This was very, very painful to troubleshoot; Involving spinning up 60 VMs simultaneously, waiting for a failure, changing one parameter, repeat. :(
