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

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Date:	Sun, 31 Mar 2013 23:11:47 +0200
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	Anders Boström <anders@...insight.net>,
	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

On Sun, Mar 31, 2013 at 12:25:58AM +0000, Ben Hutchings wrote:
> 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.
> 
> Does booting with the kernel parameter 'pci=nomsi' avoid the problem?

Thanks Ben for bringing this up.

I'll have a look if I can reproduce it in the next days and if I'll try to
find a workaround.

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