linux-ext4 - Re: torrent hash failures since 3.9.0-rc1

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Date:	Tue, 12 Mar 2013 14:44:49 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
Cc:	Theodore Ts'o <tytso@....edu>, Dave Jones <davej@...hat.com>,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
	Zheng Liu <wenqing.lz@...bao.com>
Subject: Re: torrent hash failures since 3.9.0-rc1

On Tue, Mar 12, 2013 at 07:16:24AM +0100, Markus Trippelsdorf wrote:
> On 2013.03.11 at 23:30 -0400, Theodore Ts'o wrote:
> > On Tue, Mar 12, 2013 at 11:00:58AM +0800, Zheng Liu wrote:
> > > 
> > > Thanks for reporting this problem.  My deepest apologies.
> > > 
> > > As Ted suggested, could you please try to use ext4 git tree?  I want to
> > > make sure whether this bug has been fixed by my lastest patch series or
> > > not.
> > 
> > It's definitely worth a try to compile the master branch of the ext4
> > tree and see if it reproduces or not.
> 
> I cannot reproduce the issue on top of "ext4.git dev", so fortunately
> the problem seems to be already fixed there.
> Thanks.

Great!  Thanks for the confirmation.

> 
> Do you guys have a hunch which commit is the actual fix? 
> (Maybe I will "bisect" it later today.)

I think maybe this two commits can fix it, but I am not sure which one
is the actual fix (I guess it is the former one, ;-) ).  Please try it
if you could bisect it.  Thanks in advance.

 * 079d7667af20876a59a1d9b0d4d1e15dcf17fa34
   ext4: fix wrong the number of the allocated blocks in
ext4_split_extent()

 * cdee78433c138c2f2018a6884673739af2634787
   ext4: fix wrong m_len value after unwritten extent conversion

Regards,
                                                - Zheng
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