Created attachment 1077337 [details] dmesg (host) Description of problem: AMD hardware, nested KVM enabled. I am running a single Ubuntu 14.04 guest. It *reliably* hangs the guest hard and requires a complete host reboot after I run a network-heavy command in the guest (apt-get). In the host, there are numerous errors in dmesg (see attachment). Version-Release number of selected component (if applicable): 4.1.6-201.fc22.x86_64 host hardware: AMD FX(tm)-8320 Eight-Core Processor How reproducible: 100% Steps to Reproduce: 1. Start Ubuntu 14.04 guest with nested KVM enabled. 2. Run any large apt-get command. 3. Guest hangs hard. Additional info: Seems similar to this: https://lkml.org/lkml/2015/9/18/338
Paolo - do you think it's the same issue as https://lkml.org/lkml/2015/9/18/338 ?
Doing some pruning, this bug looks to be years old. Please test on a newer kernel and reopen if the problem still exists.