On Tue, Jun 8, 2021 at 6:31 AM Ahmed S. Darwish [off-list ref] wrote:

On Mon, Jun 07, 2021, Christoph Mathys wrote:

quoted

When running kvm 5.2 on 4.9-rt (I've yet to verify if !RT is also
affected), kvm gets stuck regulary requiring a reboot. I get the
hung_task warning below.

Any thoughts on how to avoid this problem?

Did you try running the same configuration with lockdep ON?

Along with Ahmed's suggestion, would you mind testing with v4.9.271-rt182?

Also, is there any extra step to reproduce this problem or simply
firing up a VM is enough
to trigger the problem?

Luis