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Re: [Qemu-devel] [RFC PATCH v0] numa: API to lookup NUMA node by address
From: |
Bharata B Rao |
Subject: |
Re: [Qemu-devel] [RFC PATCH v0] numa: API to lookup NUMA node by address |
Date: |
Mon, 25 May 2015 13:17:57 +0530 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
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.