Date: Tue, 8 Jun 2004 10:44:22 -0500
From: Andy <genanr@emsphone.com>
To: linux-kernel@vger.kernel.org
Subject: NFS corruption (duplicated data)
Message-ID: <20040608154422.GA3946@thumper2>
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I really don't understand what could be causing this, but it happens on
several machine and at least on kernels 2.4.22, 2.4.25, 2.4.26.
NFS v3 : hard, udp, rsize=8192,wsize=8192
local filesystems are XFS

Trond, this is data corruption not dropped packets so the protocol
being UDP is not the problem.

Here is what is happening :

Copying a file of offsets from machine A to machine B over NFS and then
comparing the file on B with the file on A over NFS, the file on machine B
is corrupted in the following ways. 

Usually, data earlier in the file will show up again later.
For example :

57344 bytes of data from 672190464-672247807 is also in positions
1449664512-1449721855

sometimes, data later in the file is dupped to a position before it
should be

53248 bytes of data from 1197158400-1197211647 is also in positions
1036660736-1036713983

Any ideas

Andy
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