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Date: Fri, 29 Nov 2013 12:21:08 +0100
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Subject: Questions abou nfsd file cache and open files
From: "Charles 'Boyo" <charlesboyo@gmail.com>
To: Trond Myklebust <Trond.Myklebust@netapp.com>,
        Chuck Lever <chuck.lever@oracle.com>,
        "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>
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Hello all.

Please guide me into to find out the impact a busy nfsd is having on
the Linux page cache. Is it possible to determine which files have
portions in the page cache?

Secondly, files opened by nfs clients do not show up in lsof (or ftop)
on the nfs server? Is there any way to list these open files and more
importantly, observe the i/o to them?

Charles