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SubjectBroken NFS (perhaps Cache invalidation bug ?)
I have a problem which appears to be very similar to a cache invalidation 
bug previously reported:
http://www.ussg.iu.edu/hypermail/linux/kernel/0510.1/0582.html

With a conventional nfs mount (not automount), c0-0 a client node,
running on the nfs server:

echo 10 > Probe
ssh -x c0-0 cat Probe
echo 11 > Probe
ssh -x c0-0 cat Probe

Will give, most times, 10 & 10 rather than 10 & 11.

I've tried a wide range of things (including consulting local experts),
so far nothing. I'm not a kernel developer, so please be gentle. This
problem has occurred ever since we moved to the 4.X releases of rocks
(http://www.rocksclusters.org), X=0 or 1 although it's hidden by their
default use of automounting and it's taken some time to reduce it to
something simple.

-----------------------------------------------
Laurence Marks
Department of Materials Science and Engineering
MSE Rm 2036 Cook Hall
2220 N Campus Drive
Northwestern University
Evanston, IL 60201, USA
Tel: (847) 491-3996 Fax: (847) 491-7820
email: L-marks at northwestern dot edu
http://www.numis.northwestern.edu
-----------------------------------------------

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