Hi. We are experiencing a CephFS client issue on one of our servers.
ceph version 14.2.0 (3a54b2b6d167d4a2a19e003a705696d4fe619afc) nautilus (stable)
Trying to access, `umount`, or `umount -f` a mounted CephFS volumes causes my shell to hang indefinitely.
After a reboot I can remount the volumes cleanly but they drop out after < 1 hour of use.
I see this log entry multiple times when I reboot the server:
```
cache_from_obj: Wrong slab cache. inode_cache but object is from ceph_inode_info
```
The machine then reboots after approx. 30 minutes.
All other Ceph/CephFS clients and servers seem perfectly happy. CephFS cluster is HEALTH_OK.
Any help appreciated. If I can provide any further details please let me know.
Thanks in advance,
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