From: Eric Sandeen <sandeen@redhat.com>
Subject: Re: [RFC] ext4-locality-groups patch
Date: Wed, 13 Dec 2006 16:26:29 -0600
Message-ID: <45807E15.3080200@redhat.com>
References: <m3vekwtqnp.fsf@bzzz.home.net> <45800965.2080005@bull.net> <m3wt4vzxje.fsf@bzzz.home.net> <458010CE.6020402@redhat.com> <20061213213338.GZ5937@schatzie.adilger.int>
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Cc: Alex Tomas <alex@clusterfs.com>,
	Valerie Clement <valerie.clement@bull.net>,
	linux-ext4@vger.kernel.org
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To: Andreas Dilger <adilger@clusterfs.com>
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Andreas Dilger wrote:
> On Dec 13, 2006  08:40 -0600, Eric Sandeen wrote:
>> This is probably a discrepancy that comes from reading the block device 
>> directly, right?  Which is not necessarily in sync with the address 
>> space for the filesystem.
> 
> In fact, the block device IS in sync with the filesystem address space,
> but only for metadata.  The file data each has its own address space and
> is not coherent.

Ah, thanks for the clarification.

-Eric