linux-ext4 - Re: [PATCH 10/10 v5] ext4: remove bogus wait for unwritten extents in ext4_ind_direct

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Message-ID: <20130215071406.GF26945@gmail.com>
Date:	Fri, 15 Feb 2013 15:14:06 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org, Zheng Liu <wenqing.lz@...bao.com>,
	Theodore Ts'o <tytso@....edu>
Subject: Re: [PATCH 10/10 v5] ext4: remove bogus wait for unwritten extents
 in ext4_ind_direct_IO

On Tue, Feb 12, 2013 at 01:58:19PM +0100, Jan Kara wrote:
> On Fri 08-02-13 16:44:06, Zheng Liu wrote:
> > From: Zheng Liu <wenqing.lz@...bao.com>
> > 
> > After converting unwritten extents from extent status tree in end_io, we
> > can safely remove this bogus wait and don't worry about read stale data
> > because we always try to lookup a block mapping in extent status tree
> > firstly and unwritten extents in the tree has been converted at this
> > time.
>   But you have to make sure the extent for the range really is in the
> status tree (you didn't in the previous patch I think) and cannot be
> reclaimed until the conversion is performed on disk.

Thanks for pointing out.  I will fix this problem.

Regards,
                                                - Zheng
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