linux-ext4 - Re: [PATCH 14/26] ext4: Better estimate credits needed for ext4_da

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Message-ID: <20130604170134.GE3030@thunk.org>
Date:	Tue, 4 Jun 2013 13:01:34 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 14/26] ext4: Better estimate credits needed for
 ext4_da_writepages()

On Fri, May 31, 2013 at 11:42:47AM +0200, Jan Kara wrote:
> We limit the number of blocks written in a single loop of
> ext4_da_writepages() to 64 when inode uses indirect blocks. That is
> unnecessary as credit estimates for mapping logically continguous run of
> blocks is rather low even for inode with indirect blocks. So just lift
> this limitation and properly calculate the number of necessary credits.
> 
> This better credit estimate will also later allow us to always write at
> least a single page in one iteration.
> 
> Reviewed-by: Zheng Liu <wenqing.lz@...bao.com>
> Signed-off-by: Jan Kara <jack@...e.cz>

Thanks, applied.

					- Ted
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