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SubjectRe: [2.6.33-rc3] NFS4 and dentry issues...
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On Sat, 2010-01-09 at 14:32 +0000, Daniel J Blueman wrote: 
> When synchronising files (unison, like a two way rsync) over an NFS4
> mount (server with 2.6.32.2) on a client running 2.6.33-rc3 (also
> -rc2), I ran into dcache issues [1].
>
> I've been unable to consistently reproduce this for bisecting, and
> filesystem benchmarks via NFS on tmpfs over localhost fails to
> reproduce it either.
>
> What additional information may be useful?

There is a known issue in 2.6.33-rc3 with rename causing corruption of
the dentry lookup hash lists.

A fix for that problem has already been merged into mainline as
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git&a=commitdiff&h=56335936de1a41c8978fde62b2158af77ddc7258

Could you see if you can reproduce your problem with that fix applied?

Cheers
Trond



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