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

From: Kees Cook <keescook chromium org>
To: Sander Eikelenboom <linux eikelenboom it>
Cc: Linus Torvalds <torvalds linux-foundation org>, dm-devel redhat com, linux-ext4 vger kernel org, Ted Ts'o <tytso mit edu>, linux-kernel vger kernel org
Subject: Re: [dm-devel] EXT4-fs error (device dm-42): ext4_mb_generate_buddy:741: group 1904, 32254 clusters in bitmap, 32258 in gd
Date: Mon, 4 Jun 2012 17:03:56 -0700

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

Follow-Ups:
- Re: [dm-devel] EXT4-fs error (device dm-42): ext4_mb_generate_buddy:741: group 1904, 32254 clusters in bitmap, 32258 in gd
  - From: Sander Eikelenboom

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