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Cc: "Theodore Ts'o" <tytso@mit.edu>, Zheng Liu <wenqing.lz@taobao.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Dave Jones <davej@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
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From: "gnehzuil.liu" <gnehzuil.liu@gmail.com>
Subject: Re: [GIT PULL] ext4 updates for 3.9
Date: Thu, 28 Feb 2013 01:38:13 +0800
To: Markus Trippelsdorf <markus@trippelsdorf.de>
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在 2013-2-28，上午1:22，Markus Trippelsdorf <markus@trippelsdorf.de> 写道：

> On 2013.02.28 at 01:10 +0800, gnehzuil.liu wrote:
>> 在 2013-2-28，上午1:01，Markus Trippelsdorf <markus@trippelsdorf.de> 写道：
>> 
>>> On 2013.02.27 at 16:44 +0100, Markus Trippelsdorf wrote:
>>>> On 2013.02.27 at 10:34 -0500, Theodore Ts'o wrote:
>>>>> On Wed, Feb 27, 2013 at 01:47:27PM +0100, Markus Trippelsdorf wrote:
>>>>>> Just booted todays Linux tree and got the following errors:
>>>>>> 
>>>>>> ...
>>>>>> Feb 27 13:33:31 x4 kernel: EXT4-fs (sda): mounted filesystem with ordered data mode. Opts: (null)
>>>>>> ...
>>>>>> Feb 27 13:33:32 x4 kernel: EXT4-fs error (device sda): ext4_find_dest_de:1657: inode #70647809: block 14164000: comm cupsd: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=2569822761, rec_len=3837, name_len=1
>>>>>> Feb 27 13:33:32 x4 kernel: EXT4-fs error (device sda): ext4_find_dest_de:1657: ignore#70911401: block 15213579: comm pdnsd: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=2000846358, rec_len=36782, name_len=120
>>>>> 
>>>>> Is this reproducible? 
>>> 
>>> The issue is caused by:
>>> 
>>> commit d100eef2440fea13e4f09e88b1c8bcbca64beb9f
>>> Author: Zheng Liu <wenqing.lz@taobao.com>
>>> Date:   Mon Feb 18 00:29:59 2013 -0500
>>> 
>>>   ext4: lookup block mapping in extent status tree
>> 
>> Thanks for the report.  I am very sorry about that.  Now I am trying to fix it.
>> 
> Thank you.
> 
> Please note that if I run a kernel build with: 
> "git reset --hard f7fec032aa782d3fd7e51fbdf08aa3a296c01500" 
> (the commit before d100eef24) I get a different but similar error:
> 
>  EXT4-fs (sda): error count: 4
>  EXT4-fs (sda): initial error at 1361983458: ext4_find_dest_de:1657: inode 70911401: block 15213579 
>  EXT4-fs (sda): last error at 1361983663: ext4_find_dest_de:1658: inode 70647809: block 14164000

Yup, thanks for the note.  Could you please revert to this commit a25a4e1a5d5dc0f97dddbca44e695c532d8228c1 (the commit before f7fec032)?  I suspect that commit f7fec032 is the root cause.  Thanks for your help.

Regards,
                                                - Zheng