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To: "H. Peter Anvin" <hpa@transmeta.com>
Cc: Olaf Hering <olh@suse.de>, autofs@linux.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: race in autofs / nfs
In-Reply-To: <20010211211701.A7592@suse.de> <3A86F6AA.1416F479@transmeta.com>
From: Trond Myklebust <trond.myklebust@fys.uio.no>
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Date: 12 Feb 2001 09:57:01 +0100
In-Reply-To: "H. Peter Anvin"'s message of "Sun, 11 Feb 2001 12:31:38 -0800"
Message-ID: <shsbss8i8iq.fsf@charged.uio.no>
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>>>>> " " == H Peter Anvin <hpa@transmeta.com> writes:

     > Olaf Hering wrote:
    >>
    >> Hi,
    >>
    >> there is a race in 2.4.1 and 2.4.2-pre3 in autofs/nfs.  When
    >> the cwd is on the nfs mounted server (== busy) and you try to
    >> reboot the shutdown hangs in "rcautofs stop". I can reproduce
    >> it everytime.
    >>

     > Sounds like an NFS bug in umount.

Or a dcache bug: the above points to a corruption of the mnt_count
which is supposed to be > 0 if the partition is in use. I'm seeing a
similar leak for ext2 partitions (not involving autofs or NFS).

Cheers,
   Trond
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