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SubjectRe: NFS file locking broken (take 2)


On Sun, 23 Aug 1998, H. J. Lu wrote:

> > Alan asked:
> >
> > > Let me check one thing here. Are you using lockf/posix locks or flock.
> > > flock is generally host local.
> >
> > I went back to square one and rebuilt kernels on both machines using
> > 2.1.117 with ac1 + hj's patches from the 8/20 knfsd utils package.
> >
> > I used the attached C program to ensure that fcntl() semantics were being
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

> > applied. After verifying that the test script worked properly on local
> > storage, I tried running it on an NFS mounted directory.
> >
> > Here's what transpires (100% repeatable):
> >
>
> lockd is a mess. This patch seems to fix your problem. But I suspect
> there may be more bugs in lockd. If you can show me a testcase, I will
> take a look at it.

Hi hj,

The testcase was attached to my message. Let me know if the mailer
glitched and you failed to receive it?

Bill Hawes posted a patch that seems to alleviate the immediate symptoms.
Can you two gentlemen each take a quick look at what the other has
suggested? I will try hj's patch this evening.

Many, many thanks for your attention to this problem!

Steve





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