Date: Mon, 13 May 2013 02:21:06 +0000 (GMT)
From: EUNBONG SONG <eunb.song@samsung.com>
Subject: Re: Re: Re: EXT4 panic at jbd2_journal_put_journal_head() in 3.9+
To: Tony Luck <tony.luck@gmail.com>, Dmitry Monakhov <dmonakhov@openvz.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>,
        "linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
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> CONFIG_IA64_PAGE_SIZE_64KB=y

> fsblock size is whatever is the default for SLES11SP2 on ia64 - which
> tool will tell me?

> My git bisect finally competed and points the a finger at:

> bisect> git bisect good
> ae4647fb7654676fc44a97e86eb35f9f06b99f66 is first bad commit
> commit ae4647fb7654676fc44a97e86eb35f9f06b99f66
> Author: Jan Kara 
> Date:   Fri Apr 12 00:03:42 2013 -0400

>     jbd2: reduce journal_head size

>     Remove unused t_cow_tid field (ext4 copy-on-write support doesn't seem
>     to be happening) and change b_modified and b_jlist to bitfields thus
>     saving 8 bytes in the structure.

>     Signed-off-by: Jan Kara 
>     Signed-off-by: "Theodore Ts'o" 
>     Reviewed-by: Zheng Liu 

> :040000 040000 c39ece4341894b3daf84764ba425a87ffb90fe50
> d4e8d9185c2a1b740c235ca8ed05d496a442fce3 M      include

Hi, my git bisect result is same yours. And i reported that to community yesterday.
Thanks. 
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