[PATCH] properly reserve in bootmem the lmb reserved regions that cross numa nodes
Jon Tollefson
kniht at linux.vnet.ibm.com
Tue Oct 7 02:42:13 EST 2008
Kumar Gala wrote:
> Out of interest how to do you guys represent NUMA regions of memory in
> the device tree?
>
> - k
Looking at the source code in numa.c I see at the start of
do_init_bootmem() that parse_numa_properties() is called. It appears to
be looking at memory nodes and getting the node id from it. It gets an
associativity property for the memory node and indexes that array with a
'min_common_depth' value to get the node id.
This node id is then used to setup the active ranges in the
early_node_map[].
Is this what you are asking about? There are others I am sure who know
more about it then I though.
Jon
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