[systemd-devel] idle home NFS gets unmounted although user is still logged in

[Frank Steiner]

Dan Nicholson wrote:

> I strongly suspect you're dealing with
> https://bugzilla.redhat.com/show_bug.cgi?id=2056090. I.e., autofs

Thanks a lot, Dan! So I guess the patch was rejected upstream?

> doesn't handle mount namespaces. Since systemd uses lots of mount
> namespaces, the idle timeout essentially doesn't work. The only
> workaround I'm aware of is to run something in the root namespace that
> keeps the mount active. Having an active process with its current
> directory in the mount would do it.

But what I don't get: when I try to umount the users home manually during
the minute we are waiting for the idle-timeout, it says "busy" and refuses
the umount.

But when the idle-timeout hits, it first kills the user session and then
unmounts. Why does it kill the user session? If autofs thinks the mount
was idle, why doesn't it just try to unmount and gets "busy"?

Killing the user sessions is like "Oh, that mount is idle, I umount it,
but, hmm,  there are processes still using it, so I kill these first,
although theses processes show me that the mount is not idle"...

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