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. Thanks. Best regards. -- Milan Kocian
