Re: stacked NFS mounts

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Fri, 7 Mar 2025 17:05:33 +0100
    From:        Edgar Fuß <ef%math.uni-bonn.de@localhost>
    Message-ID:  <Z8sZTeLhQHmld1db%trav.math.uni-bonn.de@localhost>

  | You mean umount -R? That still gives me EIO.

Did you also include -f ?   I've never been in that situation, but
it might just result in the mount you want to go away being unmounted
(even if the kernel keeps trying to access the failed one, that
should be largely invisible, if the umount does work).

kre