On Mon, Oct 17, 2005 at 09:09:52PM +0200, Andi Kleen wrote:
> On Monday 17 October 2005 21:04, Linus Torvalds wrote:
>
> > So the only thing that worried me (and made me ask whether there might be
> > machines where it doesn't work) is if some machines might have their high
> > memory (or no memory at all) on NODE(0). It does sound unlikely, but I
> > simple don't know what kind of strange NUMA configs there are out there.
>
> It could happen in VirtualIron (they seem to interleave node 0 over many nodes
> to get equal use of lowmem in 32bit NUMA), but should not in x86-64..
>
> > And I'm definitely only interested in machines that are out there, not
> > some theoretical issues.
>
> According to Alex W. it will break their sx1000 IA64 boxen.
sx1000 is probably already broken; Unless the last pgdat happens to be the
memory only node with 0-4G? How about the fix I suggested which would iterate
across all nodes until it found the right node for swiotlb?
Thanks,
Kiran
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