linux-ext4 - Re: [PATCH 5/5] jbd2: Speedup jbd2_journal_dirty

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Date:	Mon, 8 Jun 2015 12:50:37 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 5/5] jbd2: Speedup jbd2_journal_dirty_metadata()

On Thu, Apr 02, 2015 at 03:58:20PM +0200, Jan Kara wrote:
> It is often the case that we mark buffer as having dirty metadata when
> the buffer is already in that state (frequent for bitmaps, inode table
> blocks, superblock). Thus it is unnecessary to contend on grabbing
> journal head reference and bh_state lock. Avoid that by checking whether
> any modification to the buffer is needed before grabbing any locks or
> references.
> 
> Signed-off-by: Jan Kara <jack@...e.cz>

Thanks, applied.

						- Ted
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