In article <[email protected]>, John D. Baker <[email protected]> wrote: >On Fri, 12 Feb 2016 01:19:59 +0000 (UTC), [email protected] (Christos >Zoulas) wrote: > >> So the problem is when nfs unmounts. You should be able to reproduce >> it > >> mount foo:/foo /foo >> cd /foo >> umount /foo > >> And now umount is stuck and never returns EBUSY. Is that true? > >On the machine in question, already stuck via 'amd', yes, attempts >to unmount an arbitrary "hard"-mounted NFS file system hangs. > >On another client which is not stuck, the above sequence does indeed >produce: > > $ cd /x > $ sudo umount /x > umount: /x: Device busy > >and continues to operate normally. I tried this during a cvs update. >A couple of times there was an slight delay, but it eventually reported >"Device busy" each time.
Ok, do a cvs update (which is what triggers it), wait a bit and then do the unmount. christos
