Hello, > I *think* this also fixes the VM hang reported in [2], 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. Milan has agreed to give this patch a spin [3], but that might > take a while because the bug is not easily reproducible. I believe the > patch can be merged on its own. > > [1] http://diy.inria.fr/www/index.html?record=aarch64&cat=aarch64-v04&litmus=SB%2Bdmb.sys&cfg=new-web > [2] https://www.spinics.net/lists/kvm/msg204543.html > [3] https://www.spinics.net/lists/kvm/msg222201.html > Unfortunately it didn't help. I can see the problem again now. Thanks. Best regards. -- Milan Kocian
