linux-ext4 - Re: [PATCH 0/8 v3] ext4: extent status tree (step 1)

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Message-ID: <20121119052859.GA22442@gmail.com>
Date:	Mon, 19 Nov 2012 13:28:59 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	Theodore Ts'o <tytso@....edu>
Cc:	linux-ext4@...r.kernel.org, jeff.liu@...cle.com, hughd@...gle.com,
	xiaoqiangnk@...il.com, achender@...ux.vnet.ibm.com,
	lczerner@...hat.com, Zheng Liu <wenqing.lz@...bao.com>
Subject: Re: [PATCH 0/8 v3] ext4: extent status tree (step 1)

On Sun, Nov 18, 2012 at 10:17:25PM -0500, Theodore Ts'o wrote:
> On Fri, Oct 26, 2012 at 09:23:37PM +0800, Zheng Liu wrote:
> > Hi all,
> > 
> > Here is the v3 of extent status tree.  In this version, the biggest change is
> > the i_es_lock (a rwlock_t) instead of i_data_sem, which is introduced to protect
> > extent status tree.  Moreover I improve the SEEK_DATA/SEEK_HOLE.  In previous
> > version, the unwritten extent is as a data, and now it will lookup page cache to
> > determine it as a data or a hole.  When it has some data at the given range, the
> > unwritten extent will be as a data.  Otherwise, it will be as a hole.  Other
> > changes contain some bug fixes.
> 
> I don't think I ack'ed this patch series earlier; my apologies.  In
> any case (with the comment fixup we discussed earlier), It's currently
> queued for the next merge window.

Thanks. :-)

BTW, I am trying to implement the second step of extent status tree,
which will track all extent status for an inode.  After that, some
improvements will be added, such as extent-level locking, etc.

Regards,
                                                - Zheng
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