Hello Milan, On 7/31/20 11:05 PM, Milan Kocian wrote: > Hello, > >> I *think* this also fixes the VM hang reported in [1], where several >> processes in the guest were stuck in uninterruptible sleep. I am not >> familiar with the block layer, but my theory is that the threads were stuck >> in wait_for_completion_io(), from blk_execute_rq() executing a flush >> request. It would be great if Milan could give this patch a spin and see if >> the problem goes away. Don't know how reproducible it is though. >> >> [1] https://www.spinics.net/lists/kvm/msg204543.html >> > Okay, I will test it but it takes some time. Because I migrated to the > qemu due this problem :-) so I need to prepare new environment. And > because the problem happens randomly. My environment can run days/few weeks > without this problem. Thank you for giving this a go, much appreciated! It's unfortunate that you had to stop using kvmtool because of the bug, hopefully this patch fixes it. Thanks, Alex
