netdev - Re: Bug#565404: linux-image-2.6.26-2-amd64: atl1e: TSO is broken

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Message-Id: <20130402.093504.1785848735327620554.anders@netinsight.net>
Date:	Tue, 02 Apr 2013 09:35:04 +0200 (CEST)
From:	Anders Boström <anders@...insight.net>
To:	ben@...adent.org.uk
Cc:	Jie.Yang@...eros.com, netdev@...r.kernel.org,
	565404@...s.debian.org, Xiong.Huang@...eros.com
Subject: Re: Bug#565404: linux-image-2.6.26-2-amd64: atl1e: TSO is broken

>>>>> "BH" == Ben Hutchings <ben@...adent.org.uk> writes:

 BH> On Tue, 2010-01-26 at 09:34 +0100, Anders Boström wrote:
 >> >>>>> "JY" == Jie Yang <Jie.Yang@...eros.com> writes:
 >> 
 JY> Anders Boström <anders@...insight.net> wrote:
 >> 
 JY> following is my test cese,
 >> >> 
 JY> a nfs server server with ar8131chip, device id 1063.
 >> >> export /tmp/ dir as the nfs share directory,  JY> the client,
 >> >> mount the server_ip:/tmp to local dir /mnt/nfs, ust a python
 >> >> script to write and read data on the  JY>
 >> >> /mnt/nfs/testnfs.log. it works fine.
 >> >> 
 >> >> OK, the device-ID in our NFS-server is 1026, rev. b0. So it
 >> >> is possible that the problem is specific to that chip/version.
 JY> oops, its my mistake in writing, my case is 1026 device ID
 >> 
 >> >> 
 JY> Can you give me some advice on how to reproduce this bug??
 >> >> 
 >> >> The only suggestion I have is to try to find a board with a
 >> >> 1026-chip on it.
 >> >> 
 >> >> My test-case is just copy of a 1 Gbyte file from the
 >> >> NFS-server to /dev/null , after making sure that the file
 >> >> isn't cached on the client by reading huge amounts of other data.
 >> >> 
 JY> just to check, if the kernel version is 2.6.26-2 ??
 >> 
 >> I've tested with
 >> Debian linux-image-2.6.26-2-amd64 version 2.6.26-19lenny2,
 >> Debian linux-image-2.6.30-bpo.2-amd64 version 2.6.30-8~bpo50+2 and
 >> kernel.org 2.6.30.10 amd64 with ethtool patch for setting of tso. Same
 >> result.

 BH> Does booting with the kernel parameter 'pci=nomsi' avoid the problem?

I'm sorry, but I can't test this at the moment. The computer with the
TSO-problem is running as a file-server => can't be used for testing.
Also, we don't use the Atheros Ethernet interface any more due to
other problems, hard hang (need reset) of the Eth-interface
every ~6 month's.

However, the computer is scheduled to be replaced as file-server quite
soon, so I might be able to test this again after the replacement.

/ Anders
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