From: Theodore Tso <tytso@mit.edu>
To: Akira Fujita <a-fujita@rs.jp.nec.com>
Cc: linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [RFC][PATCH 1/3] ext4: Add EXT4_IOC_DEFRAG ioctl and basic defrag functions
Date: Wed, 4 Feb 2009 09:59:51 -0500 [thread overview]
Message-ID: <20090204145951.GD14762@mit.edu> (raw)
In-Reply-To: <49829A37.8050701@rs.jp.nec.com>
On Fri, Jan 30, 2009 at 03:12:07PM +0900, Akira Fujita wrote:
> + *
> + * Note that the extents of target file(@o_filp) are always converted
> + * from "uninitialized" to "initialized" after swapping the blocks
> + * between the original file and the destination one(@d_filp).
> + * In the next version, this behavior will be fixed not to change extents'
> + * initializing status.
Note also that if the extent in the target file is "uninitialized",
it's not necessary to force the page into memory and then force it to
be written out again. This is important if the file involved is a
large database file which still has large areas preallocated, but not
yet initialized.
- Ted
prev parent reply other threads:[~2009-02-04 14:59 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-30 6:12 [RFC][PATCH 1/3] ext4: Add EXT4_IOC_DEFRAG ioctl and basic defrag functions Akira Fujita
2009-02-04 14:54 ` Theodore Tso
2009-02-04 14:59 ` Theodore Tso [this message]
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