linux-kernel - Re: [00/17] Large Blocksize Support V3

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Date:	Thu, 26 Apr 2007 19:09:33 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Christoph Lameter <clameter@....com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Christoph Hellwig <hch@...radead.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	David Chinner <dgc@....com>, linux-kernel@...r.kernel.org,
	Mel Gorman <mel@...net.ie>,
	William Lee Irwin III <wli@...omorphy.com>,
	Badari Pulavarty <pbadari@...il.com>,
	Maxim Levitsky <maximlevitsky@...il.com>
Subject: Re: [00/17] Large Blocksize Support V3

On Thu, Apr 26, 2007 at 08:03:58PM +0200, Jens Axboe wrote:
> On Thu, Apr 26 2007, Christoph Lameter wrote:
> > > Iff we really the larger physical page size to support the hardware
> > > then it makes sense to go down a path of larger pages.  But it doesn't.
> > 
> > You are redefining the problem. We need larger physical sizes to support 
> > the hardware. Yes. We can dodge the issue with shim layers and hacks. It 
> > is obvious from the kernel sources that this is needed.
> 
> We definitely don't. Larger sizes are ONE way to solve the problem, they
> are definitely not the only one. If the larger pages become unfeasible
> for some reason (be it fragmentation, or just because the design isn't
> good), then we can solve it differently.

Exactly.  But the only counter-proposal we have so far seems far worse :)
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