On 05/25/2017 10:10 AM, Reza Arbab wrote: > On Thu, May 25, 2017 at 04:19:53PM +1000, Michael Ellerman wrote: >> The commit message for 3af229f2071f says: >> >> In practice, we never see a system with 256 NUMA nodes, and in fact, we >> do not support node hotplug on power in the first place, so the nodes >> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ >> that are online when we come up are the nodes that will be present for >> the lifetime of this kernel. >> >> Is that no longer true? > > I don't know what the reasoning behind that statement was at the time, but as > far as I can tell, the only thing missing for node hotplug now is Balbir's > patchset [1]. He fixes the resource issue which motivated 3af229f2071f and > reverts it. > > With that set, I can instantiate a new numa node just by doing > add_memory(nid, ...) where nid doesn't currently exist. > > [1] > https://lkml.kernel.org/r/1479253501-26261-1-git-send-email-bsinghar...@gmail.com >
Yes, the change to 'numa.c' looks to be sufficient for my needs as well. -- Michael W. Bringmann Linux Technology Center IBM Corporation Tie-Line 363-5196 External: (512) 286-5196 Cell: (512) 466-0650 m...@linux.vnet.ibm.com
