Date: Tue, 21 Apr 2009 20:05:14 +0200
From: Andreas Herrmann <andreas.herrmann3@amd.com>
To: Yinghai Lu <yhlu.kernel@gmail.com>
CC: Ingo Molnar <mingo@elte.hu>, jbarnes@virtuousgeek.org,
       "H. Peter Anvin" <hpa@zytor.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] pci: derive nearby CPUs from device's instead of bus'
	NUMA information
Message-ID: <20090421180514.GB2763@alberich.amd.com>
References: <20090417100155.GE16198@alberich.amd.com> <20090417162115.GF8253@elte.hu> <86802c440904171226g520e3b67h7318ff0f80f1e782@mail.gmail.com> <20090420084747.GA7286@alberich.amd.com> <86802c440904201423y7d1290e5m5b0e2529f3a81fc3@mail.gmail.com>
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On Mon, Apr 20, 2009 at 02:23:47PM -0700, Yinghai Lu wrote:
> On Mon, Apr 20, 2009 at 1:47 AM, Andreas Herrmann
> <andreas.herrmann3@amd.com> wrote:
> > During initialization the struct device's numa_node is set to -1 and
> > later on the information is inherited from the parent numa_node.
> >
> parent numa_node could be -1 too.
> 
> in amd_bus.c
> int get_mp_bus_to_node(int busnum)
> {
>         int node = -1;
> 
>         if (busnum < 0 || busnum > (BUS_NR - 1))
>                 return node;
> 
>         node = mp_bus_to_node[busnum];
> 
>         /*
>          * let numa_node_id to decide it later in dma_alloc_pages
>          * if there is no ram on that node
>          */
>         if (node != -1 && !node_online(node))
>                 node = -1;
> 
>         return node;
> }

Ok, I see.
Thanks,

Andreas


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