linux-kernel - Re: [Question] How to represent SYSTEM

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Message-Id: <20071003135702.bdcf3f1b.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 3 Oct 2007 13:57:02 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Matthew Wilcox <matthew@....cx>
Cc:	LKML <linux-kernel@...r.kernel.org>, andi@...stfloor.org,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"tony.luck@...el.com" <tony.luck@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>, pbadari@...ibm.com,
	"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>
Subject: Re: [Question] How to represent SYSTEM_RAM in kerenel/resouce.c

On Tue, 2 Oct 2007 19:52:42 -0600
Matthew Wilcox <matthew@....cx> wrote:

> On Wed, Oct 03, 2007 at 10:31:36AM +0900, KAMEZAWA Hiroyuki wrote:
> > i386 and x86_64 registers System RAM as IORESOUCE_MEM | IORESOUCE_BUSY.
> > ia64 registers System RAM as IORESOURCE_MEM.
> > 
> > Which is better ?
> 
> Should probably be BUSY.  Non-BUSY regions can have io resources
> requested underneath them, but you wouldn't want a PCI device to be
> assigned an address which overlaps with physical memory.

Thank you.
It seems that I'll have to try modifing ia64 and memory hotplug in
the next -mm. 

Regards,
-Kame

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