From: "Lever, Charles" <cel@netapp.com>
Subject: RE: [autofs] umount fails with NFS mounts
Date: Tue, 14 Sep 2004 07:11:51 -0700
Sender: nfs-admin@lists.sourceforge.net
Message-ID: <482A3FA0050D21419C269D13989C611302B07E14@lavender-fe.eng.netapp.com>
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Cc: <autofs@linux.kernel.org>, <nfs@lists.sourceforge.net>
To: "Peter Astrand" <peter@cendio.se>
Errors-To: nfs-admin@lists.sourceforge.net

> We are using autofs for mounting home directories, but are=20
> experiencing two major problems wrt unmounting NFS mounts:
>=20
> 1) The umount command indicates that the umount succeeded,=20
> but even so,=20
> the NFS export is still mounted. This can be confirmed by looking in=20
> /etc/mtab and /proc/mounts.=20

in other words, you are able to replicate this problem without autofs
(ie, using only static mount points)?

> Any ideas? This is a major problem for us, since it's not=20
> possible to have=20
> more than 800 NFS mounts or so.=20

is there an error message in the kernel log?  you might try a few umount
commands while NFS or RPC trace debugging messages are enabled on your
client.

  sudo sysctl -w sunrpc.rpc_debug=3D32767


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