linux-kernel - Re: [patch 41/48] ocfs2: Initialize the cluster were writing to in a non-sparse extend

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Date:	Sun, 6 Sep 2009 11:17:01 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org,
	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Sunil Mushran <sunil.mushran@...cle.com>
Subject: Re: [patch 41/48] ocfs2: Initialize the cluster were writing to in
 a non-sparse extend

On Sun, Sep 06, 2009 at 01:32:50AM -0700, Joel Becker wrote:
> On Fri, Sep 04, 2009 at 02:00:40PM -0700, Joel Becker wrote:
> > On Fri, Sep 04, 2009 at 01:07:53PM -0700, Greg KH wrote:
> > > 2.6.27-stable review patch.  If anyone has any objections, please let us know.
> > > 
> > > ------------------
> > > From: Sunil Mushran <sunil.mushran@...cle.com>
> > > 
> > > commit e7432675f8ca868a4af365759a8d4c3779a3d922 upstream.
> > > 
> > > In a non-sparse extend, we correctly allocate (and zero) the clusters between
> > > the old_i_size and pos, but we don't zero the portions of the cluster we're
> > > writing to outside of pos<->len.
> > > 
> > > It handles clustersize > pagesize and blocksize < pagesize.
> > > 
> > > [Cleaned up by Joel Becker.]
> > 
> > Greg, et al,
> > 	Yesterday we found a bug in this patch.  The patch still fixes
> > the original problem, but we introduced an error in certain
> > page_mkwrite() corner cases.  We have one more validation test and then
> > I'm sending the fix to Linus.
> > 	So we really want both this commit and the followup fix in
> > -stable.  You'll be CC'd when I send Linus the pull request.
> 
> 	Ok, the fix is upstream, commit
> 8379e7c46cc48f51197dd663fc6676f47f2a1e71.  It applies on top of this
> patch, and is needed for both stable trees.

Ok, I'll queue it up.

thanks,

greg k-h
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