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Date:	Tue, 10 Oct 2006 10:19:04 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Steve Lord <lord@....org>
Cc:	David Chinner <dgc@....com>, linux-fsdevel@...r.kernel.org,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
	xfs@....sgi.com
Subject: Re: Directories > 2GB

On Mon, Oct 09, 2006 at 09:15:28PM -0500, Steve Lord wrote:
> Hi Dave,
> 
> My recollection is that it used to default to on, it was disabled
> because it needs to map the buffer into a single contiguous chunk
> of kernel memory. This was placing a lot of pressure on the memory
> remapping code, so we made it not default to on as reworking the
> code to deal with non contig memory was looking like a major
> effort.

Exactly.  The code works but tends to go OOM pretty fast at least
when the dir blocksize code is bigger than the page size.  I should
give the code a spin on my ppc box with 64k pages if it works better
there.

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