-current NFSv2 and NFSv3 issues

[Kris Kennaway]

On Wed, Oct 27, 2004 at 10:29:55AM -0600, Ben Mesander wrote:
> Hi all,
> 
>   We're seeing some data corruption and performance problems here with
> NFSv3/TCP on a machine running -current NFS client against a 4.8 NFS
> server.
> 
>   The problems can be reproduced by doing a 'make buildworld' over
> NFS.  With NFSv2 & UDP we could buildworld with -j8 and the build
> would usually - but not always - complete successfully. The times when
> it did not appeared to possibly be a result of the mtime.tv_usec not
> being checked for files over NFS (ie, one build step creates a .depend
> file, and another step tries to use it before it "appears" over NFS).

Is this a vfs.nfs.access_cache_timeout issue?  I don't remember if
that does negative caching as well.

Kris
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