linux-kernel - Re: EXT4-fs error (device dm-42): ext4_mb_generate_buddy:741: group 1904, 32254 clusters in bitmap, 32258 in gd

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Message-ID: <20120605000356.GM29466@outflux.net>
Date:	Mon, 4 Jun 2012 17:03:56 -0700
From:	Kees Cook <keescook@...omium.org>
To:	Sander Eikelenboom <linux@...elenboom.it>
Cc:	"Ted Ts'o" <tytso@....edu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	dm-devel@...hat.com, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: EXT4-fs error (device dm-42): ext4_mb_generate_buddy:741: group
 1904, 32254 clusters in bitmap, 32258 in gd

Hi,

On Mon, Jun 04, 2012 at 11:49:41PM +0200, Sander Eikelenboom wrote:
> I have enabled some debug options, this is from around when the error occurs (kernel: [  950.610126] EXT4-fs error (device dm-42): ext4_mb_generate_buddy:741: group 1699, 32254 clusters in bitmap, 32258 in gd)

Today I've finally managed to bisect this to here:
[fd034a84e1ea5c8c8d159cd2089c32e792c269b0] ext4: split out ext4_free_blocks_after_init()

If I revert all the "ext4:" patches in 3.2 up to and including that one,
I get normal behavior again.

-Kees

-- 
Kees Cook
ChromeOS Security
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