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Message-ID: <20130513135643.GB12883@gmail.com>
Date: Mon, 13 May 2013 21:56:43 +0800
From: Zheng Liu <gnehzuil.liu@...il.com>
To: Jan Kara <jack@...e.cz>
Cc: EUNBONG SONG <eunb.song@...sung.com>,
Theodore Ts'o <tytso@....edu>,
Dmitry Monakhov <dmonakhov@...nvz.org>,
"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-xfs@...r.kernel.org" <linux-xfs@...r.kernel.org>,
Dave Chinner <david@...morbit.com>
Subject: Re: Re: Re: EXT4 regression caused 4eec7
On Mon, May 13, 2013 at 03:18:09PM +0200, Jan Kara wrote:
> On Sun 12-05-13 13:04:59, EUNBONG SONG wrote:
> >
> >
> > >> Since at this point it's safer to rollback the change and we can
> > >> investigate more deeply how to fix it correctly for the next
> > >> development cycle, this is the patch which I'm testing.
> >
> > >> - Ted
> >
> > > Hello, I've tested with your patch. But the same problem was reproduced.
> > > Currently, I'm trying to git bisect. If i done git bisect, i will let you know.
> >
> > Hi, I've done git bisect. and panic at jbd2_journal_put_journal_head() is caused by
> > ae4647fb7654676fc44a97e86eb35f9f06b99f66: "jbd2: reduce journal_head size."
> > I write just code patch which revert ae4647fb7654676fc44a97e86eb35f9f06b99f66 because
> > I don't know the root cause.
> This is really strange. I've verified the code and all the places
> modifying b_jlist or b_modified are holding bh_state lock so we should be
> safe...
Hi Jan,
Could you please take a look at this mail [1]. I don't think we hold
bh_state lock there.
1. http://www.spinics.net/lists/linux-ext4/msg38205.html
Thanks,
- Zheng
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