[libvirt-users] global lock when executing hook scripts

Hello. I'm try to understand, why in case of 20 workers libvirt fully locked when runs qemu hook (when domain starts) virsh list freezes. As i understand in case of using more workers it utilized to run hooks too, but as i see in pstree only main libvirt process executes hook. Why this happening? pstree -a -p 6642 libvirtd,6642 -d -l ├─qemu,9272 /etc/libvirt/hooks/qemu testvm prepare begin - │ └─prepare,9468 -x /usr/local/prepare.sh testvm │ └─sleep,9469 5000 ├─{libvirtd},6643 ├─{libvirtd},6644 ├─{libvirtd},6645 ├─{libvirtd},6646 ├─{libvirtd},6647 ├─{libvirtd},6648 -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru