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Date: Sun, 12 May 2013 13:05:00 +0000 (GMT) From: EUNBONG SONG <eunb.song@...sung.com> To: Theodore Ts'o <tytso@....edu>, Dmitry Monakhov <dmonakhov@...nvz.org> Cc: Jan Kara <jack@...e.cz>, "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 >> 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. Signed-off-by: Eunbong Song <eunb.song@...sung.com> --- include/linux/journal-head.h | 11 +++++++++-- 1 files changed, 9 insertions(+), 2 deletions(-) diff --git a/include/linux/journal-head.h b/include/linux/journal-head.h index 13a3da2..c18b46f 100644 --- a/include/linux/journal-head.h +++ b/include/linux/journal-head.h @@ -31,14 +31,21 @@ struct journal_head { /* * Journalling list for this buffer [jbd_lock_bh_state()] */ - unsigned b_jlist:4; + unsigned b_jlist; /* * This flag signals the buffer has been modified by * the currently running transaction * [jbd_lock_bh_state()] */ - unsigned b_modified:1; + unsigned b_modified; + + /* + * This feild tracks the last transaction id in which this buffer + * has been cowed + * [jbd_lock_bh_state()] + */ + tid_t b_cow_tid; /* * Copy of the buffer data frozen for writing to the log. -- 1.7.0.4 Thanks.
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