linux-kernel - Re: Ext4 tree backports for 2.6.27.13 and 2.6.28.2

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Message-ID: <20090210183602.404ee561@dhcp-100-2-144.bos.redhat.com>
Date:	Tue, 10 Feb 2009 18:36:02 -0500
From:	Chuck Ebbert <cebbert@...hat.com>
To:	"Theodore Ts'o" <tytso@....edu>
Cc:	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Ext4 tree backports for 2.6.27.13 and 2.6.28.2

On Sat, 31 Jan 2009 00:25:39 -0500
"Theodore Ts'o" <tytso@....edu> wrote:

> I've updated the ext4 backport branches on the ext4 git tree:
> 
>    git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git
>    http://git.kernel.org/?p=linux/kernel/git/tytso/ext4.git
> 
> The for-stable branch is branched off of 2.6.28.2, and has a candidate
> set of patches to be included in the next stable release.  The
> for-stable-2.6.27 branch is branched off of 2.6.27.13.  
> 
> I'm more confident with the 2.6.28 stable candidate than the 2.6.27
> stable candidates at the moment, but given that we just missed the
> 2.6.27.14 and 2.6.28.3 release cycles, that should give us plenty of
> time to test the patches.
> 

.27 has a bug and one patch got merged in .27.14...

> 
> mainline 2.6.28  2.6.27
>     commit-description
> -------------------------------------------------------------------------
> c894058d -----   71ae3e25
>     ext4: Use an rbtree for tracking blocks freed during transaction.
> 

The chunk that creates the ext4_free_block_extents cache is misapplied: it
ended up at the end of ext4_mb_use_preallocated() instead of
init_ext4_mballoc(). The null cache pointer then causes oopses when trying
to delete files.

> a21102b5 1b1872b 0f30c439
>     ext3: Add sanity check to make_indexed_dir
> 

This went into 2.6.27.14.
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