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

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Message-Id: <20070521152830.a844d7ef.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Mon, 21 May 2007 15:28:30 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	clameter@....com, npiggin@...e.de, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-arch@...r.kernel.org
Subject: Re: [rfc] increase struct page size?!

On Fri, 18 May 2007 13:37:09 -0700
"Luck, Tony" <tony.luck@...el.com> wrote:

> > I wonder if there are other uses for the free space?
> 
> 	unsigned long moreflags;
> 
> Nick and Hugh were just sparring over adding a couple (or perhaps 8)
> flag bits.  This would supply 64 new bits ... maybe that would keep
> them happy for a few more years.
> 
- page->zone 
  free some flags bits and makes page_zone() simple.
  and software (fake) zone for memory control can be added ?
or 

-page->some_memory_controler ?
(I don't know whether resource controller people want this or not.)

-Kame

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