linux-kernel - Re: [rfc] increase struct page size?!

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Message-ID: <Pine.LNX.4.64.0705211006550.26282@schroedinger.engr.sgi.com>
Date:	Mon, 21 May 2007 10:08:06 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Andi Kleen <ak@...e.de>
cc:	Eric Dumazet <dada1@...mosbay.com>,
	William Lee Irwin III <wli@...omorphy.com>,
	Nick Piggin <npiggin@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Memory Management List <linux-mm@...ck.org>,
	linux-arch@...r.kernel.org
Subject: Re: [rfc] increase struct page size?!

On Sun, 20 May 2007, Andi Kleen wrote:

> Besides with the scarcity of pageflags it might make sense to do "64 bit only"
> flags at some point.

There is no scarcity of page flags. There is

1. Hoarding by Andrew

2. Waste by Sparsemem (section flags no longer necessary with
   virtual memmap)

2 will hopefully be addressed soon and with that 1 will go away.

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