From: Kasparek Tomas <kasparek@fit.vutbr.cz>
Subject: Re: NFS corruption in 2.6.18.2?
Date: Thu, 23 Nov 2006 22:33:11 +0100
Message-ID: <20061123213311.GH40079@fit.vutbr.cz>
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On Thu, Nov 23, 2006 at 06:24:56PM +0100, Kasparek Tomas wrote:
> On Thu, Nov 23, 2006 at 05:17:38PM +0100, Kasparek Tomas wrote:
> > 
> > > >have seen this behaviour with kernel 2.6.18 and above up to 19-rc4.
> > > > Reported this, but no response.
> > > > 
> > > > http://lkml.org/lkml/2006/9/28/89
> > >
> > > Your test script doesn't use any form of locking. How are you ensuring
> > > that only one client has the file open at a time?
> > 
> > I use no locking at all, it's just synthetic test, I don't expect data to
> > be ordered or whatever, but the problem is blocks of zeros inserted.
> > It behaves right with the last 2.6.16.32, zeros are contained if clients
> > are 2.6.18.3 and 2.6.19-rc4. 
> > 
> > I'm going to do more testing in next few days, so hoe bring some new info.
> > 
> > As I wrote before, it does not depend on the server (tried with FreeBSD
> > server and several versions of linux 2.6.16.x and 2.6.18.x).
> 
> Just update: 2.6.17.14 is ok

did git bisect between 2.6.17 and 2.6.18 and found that the commit is:

44b11874ff583b6e766a05856b04f3c492c32b84
 NFS: Separate metadata and page cache revalidation mechanisms

will verify (with and without patch) tomorrow.

Bye

--   

  Tomas Kasparek, PhD student  E-mail: kasparek@fit.vutbr.cz
  CVT FIT VUT Brno, BI/140a    Web:    http://www.fit.vutbr.cz/~kasparek
  Bozetechova 2, 612 66        Fax:    +420 54114-1270
  Brno, Czech Republic         Phone:  +420 54114-1220

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