linux-ext4 - Re: [RFC] basic delayed allocation in VFS

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Message-ID: <46A9E634.1090409@garzik.org>
Date:	Fri, 27 Jul 2007 08:33:56 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Alex Tomas <alex@...sterfs.com>
CC:	David Chinner <dgc@....com>,
	ext4 development <linux-ext4@...r.kernel.org>,
	linux-fsdevel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [RFC] basic delayed allocation in VFS

Alex Tomas wrote:
>> So without the ability to attach specific I/O completions to bios
>> or support for unwritten extents directly in __mpage_writepage,
>> there is no way XFS can use this "generic" delayed allocation code.
> 
> I didn't say "generic", see Subject: :)

Well, it shouldn't even be in the VFS layer if it's only usable by one 
filesystem.

	Jeff


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