Hello, I cannot flatten an image, it always restarts with: root@sm-node1.in.illusion.hu:~# rbd flatten vm-hdd/vm-104-disk-1 Image flatten: 28% complete...2021-04-29 10:50:27.373 7ff7caffd700 -1 librbd::operation::FlattenRequest: 0x7ff7c4009db0 should_complete: encountered error: (85) Interrupted system call should be restarted Image flatten: 26% complete...2021-04-29 10:50:33.053 7ff7caffd700 -1 librbd::operation::FlattenRequest: 0x7ff7c4008fc0 should_complete: encountered error: (85) Interrupted system call should be restarted Image flatten: 0% complete...2021-04-29 10:50:34.829 7ff7caffd700 -1 librbd::operation::FlattenRequest: 0x7ff7c445b470 should_complete: encountered error: (85) Interrupted system call should be restarted Image flatten: 39% complete...2021-04-29 10:50:42.081 7ff7caffd700 -1 librbd::operation::FlattenRequest: 0x7ff7c40324e0 should_complete: encountered error: (85) Interrupted system call should be restarted Image flatten: 0% complete...2021-04-29 10:50:43.897 7ff7caffd700 -1 librbd::operation::FlattenRequest: 0x7ff7c4018890 should_complete: encountered error: (85) Interrupted system call should be restarted Image flatten: 42% complete...2021-04-29 10:51:07.813 7ff7caffd700 -1 librbd::operation::FlattenRequest: 0x7ff7c402fe80 should_complete: encountered error: (85) Interrupted system call should be restarted Image flatten: 42% complete...2021-04-29 10:51:29.372 7ff7caffd700 -1 librbd::operation::FlattenRequest: 0x7ff7c40017c0 should_complete: encountered error: (85) Interrupted system call should be restarted root@sm-node1.in.illusion.hu:~# uname -a Linux sm-node1.in.illusion.hu 5.4.106-1-pve #1 SMP PVE 5.4.106-1 (Fri, 19 Mar 2021 11:08:47 +0100) x86_64 GNU/Linux root@sm-node1.in.illusion.hu:~# dpkg -l |grep ceph ii ceph 14.2.20-pve1 amd64 distributed storage and file system ii ceph-base 14.2.20-pve1 amd64 common ceph daemon libraries and management tools ii ceph-common 14.2.20-pve1 amd64 common utilities to mount and interact with a ceph storage cluster ii ceph-fuse 14.2.20-pve1 amd64 FUSE-based client for the Ceph distributed file system ii ceph-mds 14.2.20-pve1 amd64 metadata server for the ceph distributed file system ii ceph-mgr 14.2.20-pve1 amd64 manager for the ceph distributed storage system ii ceph-mgr-dashboard 14.2.20-pve1 all dashboard plugin for ceph-mgr ii ceph-mon 14.2.20-pve1 amd64 monitor server for the ceph storage system ii ceph-osd 14.2.20-pve1 amd64 OSD server for the ceph storage system ii libcephfs2 14.2.20-pve1 amd64 Ceph distributed file system client library ii python-ceph-argparse 14.2.20-pve1 all Python 2 utility libraries for Ceph CLI ii python-cephfs 14.2.20-pve1 amd64 Python 2 libraries for the Ceph libcephfs library root@sm-node1.in.illusion.hu:~# dpkg -l |grep rbd ii librbd1 14.2.20-pve1 amd64 RADOS block device client library ii python-rbd 14.2.20-pve1 amd64 Python 2 libraries for the Ceph librbd library root@sm-node1.in.illusion.hu:~# modinfo rbd filename: /lib/modules/5.4.106-1-pve/kernel/drivers/block/rbd.ko license: GPL description: RADOS Block Device (RBD) driver author: Jeff Garzik <jeff@garzik.org> author: Yehuda Sadeh <yehuda@hq.newdream.net> author: Sage Weil <sage@newdream.net> author: Alex Elder <elder@inktank.com> srcversion: 7BA6FEE20249E416B2D09AB depends: libceph retpoline: Y intree: Y name: rbd vermagic: 5.4.106-1-pve SMP mod_unload modversions parm: single_major:Use a single major number for all rbd devices (default: true) (bool) Please give me advice, how can I produce more information to catch this. Thank you, i.