linux-ext4 - Re: [PATCH 4/4] jbd2: Track more dependencies on transaction commit

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Message-ID: <20160630154504.GF2028@thunk.org>
Date:	Thu, 30 Jun 2016 11:45:04 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org, Eryu Guan <eguan@...hat.com>
Subject: Re: [PATCH 4/4] jbd2: Track more dependencies on transaction commit

On Thu, Jun 16, 2016 at 12:42:16PM +0200, Jan Kara wrote:
> So far we were tracking only dependency on transaction commit due to
> starting a new handle (which may require commit to start a new
> transaction). Now add tracking also for other cases where we wait for
> transaction commit. This way lockdep can catch deadlocks e. g. because we
> call jbd2_journal_stop() for a synchronous handle with some locks held
> which rank below transaction start.
> 
> Signed-off-by: Jan Kara <jack@...e.cz>

Thanks, applied.

						- Ted
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