Re: nfs root problem in linux-next

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On Mon, 2012-06-25 at 16:26 -0400, Mark Salter wrote:
> As of Friday's linux-next I've been unable to successfully boot using an
> nfs root with a c6x board. I bisected it to this patch:
> 
>   commit cc3b296fd9a01c9e654bcb9373af70dd6e32fb24
>   Author: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
>   Date:   Thu Jun 21 14:53:10 2012 -0400
> 
>       SUNRPC: Clean up xdr_read_pages and xdr_enter_page
> 
> I placed "good-boot" and "bad-boot" packet capture files at:
> 
>   http://people.redhat.com/~msalter/linux-next/
> 
> The only difference in the kernels used is the above patch. The
> bad-boot mounted the nfs root but was unable to find the init
> file which caused a panic. The nfsroot= parameter uses v3,tcp
> flags and the server side is running rhel6.
> 
> I'm not at all familiar with the nfs code, but can help with
> testing or providing any addtional info needed.

Hi Mark,

So you are saying that reverting that patch alone suffices to fix the
problem that you are seeing?

Firstly, a big "Thank You!!!" for testing the linux-next branch. I very
much appreciate that you report the bugs before they get merged
upstream.

I'll have a look to see if I can find out what is the problem. The only
significant change that patch should be introducing would be the use of
xdr_stream_pos().

-- 
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust@xxxxxxxxxx
www.netapp.com

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