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From: Zheng Liu <gnehzuil.liu@gmail.com>
To: Jan Kara <jack@suse.cz>
Cc: linux-ext4@vger.kernel.org, Zheng Liu <wenqing.lz@taobao.com>,
	Theodore Ts'o <tytso@mit.edu>
Subject: Re: [PATCH 10/10 v5] ext4: remove bogus wait for unwritten extents in ext4_ind_direct_IO
Date: Fri, 15 Feb 2013 15:14:06 +0800	[thread overview]
Message-ID: <20130215071406.GF26945@gmail.com> (raw)
In-Reply-To: <20130212125819.GE19583@quack.suse.cz>

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@taobao.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

  reply	other threads:[~2013-02-15  6:59 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-08  8:43 [PATCH 00/10 v5] ext4: extent status tree (step2) Zheng Liu
2013-02-08  8:43 ` [PATCH 01/10 v5] ext4: refine extent status tree Zheng Liu
2013-02-08 15:35   ` Jan Kara
2013-02-15  6:38     ` Zheng Liu
2013-02-08  8:43 ` [PATCH 02/10 v5] ext4: add physical block and status member into " Zheng Liu
2013-02-08 15:39   ` Jan Kara
2013-02-08  8:43 ` [PATCH 03/10 v5] ext4: let ext4_ext_map_blocks return EXT4_MAP_UNWRITTEN flag Zheng Liu
2013-02-08 15:41   ` Jan Kara
2013-02-08  8:44 ` [PATCH 04/10 v5] ext4: track all extent status in extent status tree Zheng Liu
2013-02-11 12:21   ` Jan Kara
2013-02-15  6:45     ` Zheng Liu
2013-02-13  3:28   ` Theodore Ts'o
2013-02-13  3:46     ` [PATCH 1/2] ext4: rename ext4_es_find_extent() to ext4_es_find_delayed_extent() Theodore Ts'o
2013-02-13  3:46       ` [PATCH 2/2] ext4: track all extent status in extent status tree Theodore Ts'o
2013-02-15  6:53     ` [PATCH 04/10 v5] " Zheng Liu
2013-02-17 16:26     ` Zheng Liu
2013-02-08  8:44 ` [PATCH 05/10 v5] ext4: lookup block mapping " Zheng Liu
2013-02-12 12:31   ` Jan Kara
2013-02-15  7:06     ` Zheng Liu
2013-02-15 16:47       ` Jan Kara
2013-02-15 17:25       ` Theodore Ts'o
2013-02-16  2:32         ` Zheng Liu
2013-02-16 16:18           ` Possible TODO projects for the map_blocks() code path (was: Re: [PATCH 05/10 v5] ext4: lookup block mapping in extent status tree) Theodore Ts'o
2013-02-17  3:15             ` Zheng Liu
2013-02-08  8:44 ` [PATCH 06/10 v5] ext4: remove single extent cache Zheng Liu
2013-02-08  8:44 ` [PATCH 07/10 v5] ext4: adjust some functions for reclaiming extents from extent status tree Zheng Liu
2013-02-08  8:44 ` [PATCH 08/10 v5] ext4: reclaim " Zheng Liu
2013-02-08  8:44 ` [PATCH 09/10 v5] ext4: convert unwritten extents from extent status tree in end_io Zheng Liu
2013-02-10  8:45   ` Zheng Liu
2013-02-11  1:52     ` Theodore Ts'o
2013-02-12 12:51   ` Jan Kara
2013-02-15  7:12     ` Zheng Liu
2013-02-08  8:44 ` [PATCH 10/10 v5] ext4: remove bogus wait for unwritten extents in ext4_ind_direct_IO Zheng Liu
2013-02-12 12:58   ` Jan Kara
2013-02-15  7:14     ` Zheng Liu [this message]
2013-02-10  1:38 ` [PATCH 00/10 v5] ext4: extent status tree (step2) Theodore Ts'o
2013-02-10  8:40   ` Zheng Liu

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