linux-kernel - Re: [stable] [patch 086/104] ext4: fix initialization of UNINIT bitmap blocks

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Date:	Fri, 5 Dec 2008 10:36:13 -0800
From:	Greg KH <greg@...ah.com>
To:	Theodore Tso <tytso@....edu>, Greg KH <gregkh@...e.de>,
	linux-kernel@...r.kernel.org, stable@...nel.org,
	Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	Domenico Andreoli <cavokz@...il.com>, Willy Tarreau <w@....eu>,
	Rodrigo Rubira Branco <rbranco@...checkpoint.com>,
	Jake Edge <jake@....net>, Eugene Teo <eteo@...hat.com>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Frederic Bohe <frederic.bohe@...l.net>,
	Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [stable] [patch 086/104] ext4: fix initialization of UNINIT
	bitmap blocks

On Wed, Dec 03, 2008 at 11:10:16PM -0500, Theodore Tso wrote:
> On Wed, Dec 03, 2008 at 11:56:18AM -0800, Greg KH wrote:
> > 2.6.27-stable review patch.  If anyone has any objections, please let us know.
> 
> Turns out this patch introduces a worse regression than it fixes.  The
> bug that the patches fixes is that on-line resizes of filesystems with
> a 1k blocksize will usually fail.  The regression is that when a
> filesystem with 1k blocksize is stressed, the filesystem can get
> corrupted.  On balance, on-line resizing failing is less of a disaster
> than corrupting the filesystem when its stressed.  Fortunately, it's
> only an issue when the filesystem blocksize is less than the page
> size, which isn't the common case at least for the x86.  
> 
> There are patches queued up to address this, but they haven't hit
> mainline yet.  Probably best to pull this from the stable tree for
> now.

Thanks for letting me know, I've now dropped it from this release.

greg k-h
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