Hi, starting with v5.6-rc1, I've noticed that my shutdown scripts do not work properly anymore in case there's any NFS4 mounts present. The issue stems from an fstype change: while NFS4 mounts previously had fstype "nfs4", they now have type "nfs". As a result, my "umount -at nfs4" doesn't do anything, resulting in a hang later on. While this can trivially be fixed on my side by doing "umount -at nfs,nfs4", I guess that this was an involuntary change. A bisect points to commit f2aedb713c28 (NFS: Add fs_context support., 2019-12-10). Reproducer: $ mount.nfs4 host:/mnt /mnt $ findmnt -otarget,source,fstype /mnt TARGET SOURCE FSTYPE /mnt host:/mnt nfs Patrick
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