linux-kernel - Re: [PATCH 2/3] add dev_to

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Date:	Sat, 11 Nov 2006 09:08:51 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Lee Schermerhorn <Lee.Schermerhorn@...com>
Cc:	clameter@....com, hch@....de, davem@...emloft.net,
	linux-kernel@...r.kernel.org, netdev@....sgi.com,
	linux-mm@...ck.org
Subject: Re: [PATCH 2/3] add dev_to_node()

On Fri, 10 Nov 2006 13:28:25 -0500
Lee Schermerhorn <Lee.Schermerhorn@...com> wrote:

> On Fri, 2006-11-10 at 10:16 -0800, Christoph Lameter wrote:
> > On Wed, 8 Nov 2006, KAMEZAWA Hiroyuki wrote:
> > 
> > > I wonder there are no code for creating NODE_DATA() for device-only-node.
> > 
> > On IA64 we remap nodes with no memory / cpus to the nearest node with 
> > memory. I think that is sufficient.
> 
> I don't think this happens anymore.  

In my understanding , from drivers/acpi/numa.c, 
a node is created by a pxm found in SRAT table at boot time.

the node-number for the pxm which was not found in SRAT at boot time is "-1".
please check how acpi_map_pxm_to_node() is used.

If pci's node-id is based on pxm, checking return vaule of pxm_to_node() 
will be good.

-Kame

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