> On Tue, Apr 15, 2008 at 2:14 PM, Johannes Weiner <hannes@saeurebad.de> wrote:
>> Hi,
>>
>> "Yinghai Lu" <yhlu.kernel@gmail.com> writes:
>>
>>
>> >> > 2. intel cross node box: node0: 0g-2g, 4g-6g, node1: 2g-4g, 6g-8g. i
>> >> > don't think they have two bdata struct for every node.
>> >>
>> >> How do the bdata structures represent this setup right now? Are you
>> >> sure that there is not a node descriptor for every contiguous region?
>> >
>> >
http://lkml.org/lkml/2008/3/25/233
>> >
>> > Subject [patch] srat, x86_64: Add support for nodes spanning other nodes
>> >
>> > For example, If the physical address layout on a two node system with 8 GB
>> > memory is something like:
>> > node 0: 0-2GB, 4-6GB
>> > node 1: 2-4GB, 6-8GB
>> >
>> > Current kernels fail to boot/detect this NUMA topology.
>> >
>> > ACPI SRAT tables can expose such a topology which needs to be supported.
>> >
>> > Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
>>
>> As I understood the code (more guessing than understanding), it breaks
>> down these physical nodes into contiguous logical memory blocks which
>> then get represented by having a node descriptor for each of them. Can
>> you confirm that?
>
> Not sure, on x86_64 one node should have one bdata only.
> execpt suresh update that to make one node have two bdata.
