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Date: Mon, 27 Jan 2003 00:30:56 +0100 (CET)
From: Martin Blapp <mb@imp.ch>
To: Tim Kientzle <kientzle@acm.org>, "" <rwatson@freebsd.org>
Cc: freebsd-hackers@freebsd.org
Subject: Re: umount of procfs fails
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Hi,

I just checked this:

-su-2.05b# mount -t procfs proc /proc/

-su-2.05b# mount -t procfs proc /mnt

-su-2.05b# mount
[...]
procfs on /proc (procfs, local)
procfs on /mnt (procfs, local)

-su-2.05b# umount procfs

-su-2.05b# mount
[...]
procfs on /mnt (procfs, local)

Looks like the wrong got unmounted. The mountlist should
be traversed in reverse order.

I fixed exactly this type of bug for NFS mounts and UFS
disks. It works there fine. I'll have a look at the code
tomorrow.

Bye the way, mounting procfs overlay over the same existing
mount works, unmounting the first results in a PANIC (TM).

I'll try to fix the userland stuff.

Martin

Martin Blapp, <mb@imp.ch> <mbr@FreeBSD.org>
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