Re: [PATCH] pci: derive nearby CPUs from device's instead of bus' NUMA information

Andreas Herrmann
2009-04-21T18:06:03Z

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