Re: bdrv_drained_begin deadlock with io-threads

[Dietmar Maurer]

> > I really nobody else able to reproduce this (somebody already tried to 
> > reproduce)?
> 
> I can get hangs, but that's for job_completed(), not for starting the
> job. Also, my hangs have a non-empty bs->tracked_requests, so it looks
> like a different case to me.

Please can you post the command line args of your VM? I use something like

./x86_64-softmmu/qemu-system-x86_64 -chardev 
'socket,id=qmp,path=/var/run/qemu-server/101.qmp,server,nowait' -mon 
'chardev=qmp,mode=control' -pidfile /var/run/qemu-server/101.pid  -m 1024 
-object 'iothread,id=iothread-virtioscsi0' -device 
'virtio-scsi-pci,id=virtioscsi0,iothread=iothread-virtioscsi0' -drive 
'file=/backup/disk3/debian-buster.raw,if=none,id=drive-scsi0,format=raw,cache=none,aio=native,detect-zeroes=on'
 -device 
'scsi-hd,bus=virtioscsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0,id=scsi0'
 -machine "type=pc,accel=kvm"

Do you also run "stress-ng -d 5" indied the VM?