linux-ext4 - Re: [PATCH 06/26] jbd2: Cleanup needed free block estimates when starting a transaction

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Message-ID: <20130604161745.GG25160@thunk.org>
Date:	Tue, 4 Jun 2013 12:17:45 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 06/26] jbd2: Cleanup needed free block estimates when
 starting a transaction

On Fri, May 31, 2013 at 11:42:39AM +0200, Jan Kara wrote:
> __jbd2_log_space_left() and jbd_space_needed() were kind of odd.
> jbd_space_needed() accounted also credits needed for currently committing
> transaction while it didn't account for credits needed for control blocks.
> __jbd2_log_space_left() then accounted for control blocks as a fraction of free
> space. Since results of these two functions are always only compared against
> each other, this works correct but is somewhat strange. Move the estimates so
> that jbd_space_needed() returns number of blocks needed for a transaction
> including control blocks and __jbd2_log_space_left() returns free space in the
> journal (with the committing transaction already subtracted). Rename functions
> to jbd2_log_space_left() and jbd2_space_needed() while we are changing them.
> 
> Reviewed-by: Zheng Liu <wenqing.lz@...bao.com>
> Signed-off-by: Jan Kara <jack@...e.cz>

Thanks, applied.

						- Ted
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