linux-kernel - Re: [NFS] blocks of zeros (NULLs) in NFS files in kernels >= 2.6.20

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Message-ID: <20080905200455.GH22796@merfinllc.com>
Date:	Fri, 5 Sep 2008 13:04:55 -0700
From:	Aaron Straus <aaron@...finllc.com>
To:	Chuck Lever <chuck.lever@...cle.com>
Cc:	Neil Brown <neilb@...e.de>,
	Linux NFS Mailing List <linux-nfs@...r.kernel.org>,
	Trond Myklebust <trond.myklebust@....uio.no>,
	LKML Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [NFS] blocks of zeros (NULLs) in NFS files in kernels >= 2.6.20

Hi,

On Sep 05 03:56 PM, Chuck Lever wrote:
> [ replacing cc: nfs@...net with linux-nfs@...r.kernel.org, and neil's  
> old address with his current one ]

Sorry I probably grabbed an old MAINTAINERS file.

> On Sep 5, 2008, at Sep 5, 2008, 3:19 PM, Aaron Straus wrote:
> > Writer_Version     Outcome:
> > <= 2.6.19          OK
> > >= 2.6.20	    BAD
> 
> Up to which kernel?  Recent ones may address this issue already.

BAD up to 2.6.27-rc? 

I have to see exactly which is the last rc version I tested.

> > I can try to bisect between 2.6.19 <-> 2.6.20.
> 
> That's a good start.

OK will try to bisect.

> Comparing a wire trace with strace output, starting with the writing  
> client, might also be illuminating.  We prefer wireshark as it uses  
> good default trace settings, parses the wire bytes and displays them  
> coherently, and allows you to sort the frames in various useful ways.

OK.  Could you also try to reproduce on your side using those python
programs?  I want to make sure it's not something specific with our
mounts, etc.

Thanks!
					=a=


-- 
===================
Aaron Straus
aaron@...finllc.com
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