From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Date: Wed, 03 Oct 2007 01:52:42 +0000 Subject: Re: [Question] How to represent SYSTEM_RAM in kerenel/resouce.c Message-Id: <20071003015242.GC12049@parisc-linux.org> List-Id: References: <20071003103136.addbe839.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20071003103136.addbe839.kamezawa.hiroyu@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: KAMEZAWA Hiroyuki Cc: LKML , andi@firstfloor.org, "linux-mm@kvack.org" , "tony.luck@intel.com" , Andrew Morton , pbadari@us.ibm.com, "linux-ia64@vger.kernel.org" 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. -- Intel are signing my paycheques ... these opinions are still mine "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step."