Hi Pavel, et al, Running Fedora 33 KVM/QEMU on s390x, I recently noticed a couple of oddities when shutting down my guests, which I bisected between 7.0.0 and 7.1.0 to your commit: commit 184245f53b94fc84f727eb6e8a2aa52df02d69c0 Author: Pavel Hrdina <phrdina@xxxxxxxxxx> Date: Tue Feb 9 12:33:53 2021 +0100 vircgroup: introduce nested cgroup to properly work with systemd The attached patch is based on some of the tweaks you did to use the parent/nested pointers in a cgroup, rather than a cgroup itself. It fixes both problems I'm encountering, but as this code is quite unfamiliar to me, I might well be way off track and would appreciate your feedback in the matter. Apologies for hitting this on the same day as freeze; I had not noticed the messages previously, and started digging yesterday when I noted the number of file descriptors left open by libvirt. Thanks, Eric Eric Farman (1): vircgroup: Cleanup nested cgroups src/util/vircgroup.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) -- 2.25.1