Re: [Qemu-devel] [RFC PATCH v0] numa: API to lookup NUMA node by address

[Bharata B Rao <bharata@linux.vnet.ibm.com>]

On Thu, May 14, 2015 at 11:39:06AM +0200, Paolo Bonzini wrote:
> 
> 
> On 13/05/2015 20:06, Eduardo Habkost wrote:
> > Also, this introduces a circular dependency between pc-dimm.c and
> > numa.c. Instead of that, pc-dimm could simply notify us when a new
> > device is realized (with just (addr, end, node) as arguments), so we can
> > save the list of memory ranges inside struct node_info.
> > 
> > I wonder if the memory API already provides something that would help
> > us. Paolo, do you see a way we could simply use a MemoryRegion as input
> > to lookup the NUMA node?
> 
> No, but I guess you could add a numa_get/set_memory_region_node_id API
> that uses a hash table.  That's a variant of the "pc-dimm could simply
> notify" numa.c that you propose above.

While you say we can't use MemoryRegion as input to lookup the NUMA node,
you suggest that we add numa_get/set_memory_region_node_id. Does this API
get/set NUMA node id for the given MemoryRegion ? 

Regards,
Bharata.