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    SubjectRe: umount() and NFS races in 2.4.26
    On Sat, 10 Jul 2004, Thomas Moestl wrote:

    > > Never the less I'm sure there is a race in waitq.c of autofs4 in
    > > 2.4 that seems to cause this problem. This is one of the things
    > > addressed by my patch.
    >
    > The system in question still uses autofs3. While I believe that the
    > waitq race is also present there (it could probably cause directory
    > lookups to hang, if I understand it correctly), I do not think that
    > any autofs3 code could cause exactly those symptoms that I have
    > observed. For that, it would have to obtain dentries of the file
    > systems that it has mounted, but the old code never does that.

    I don't think autofs v3 has this race. It uses the BKL everywhere to
    serialise execution. Never the less people seem to see the "busy inode"
    messages sometimes.

    Ian

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