On Wed, Jun 24, 2020 at 02:58:44PM +0530, Srikar Dronamraju wrote: > A Powerpc system with multiple possible nodes and with CONFIG_NUMA > enabled always used to have a node 0, even if node 0 does not any cpus > or memory attached to it. As per PAPR, node affinity of a cpu is only > available once its present / online. For all cpus that are possible but > not present, cpu_to_node() would point to node 0. > > To ensure a cpuless, memoryless dummy node is not online, powerpc need > to make sure all possible but not present cpu_to_node are set to a > proper node. > > Cc: linuxppc-dev@lists.ozlabs.org > Cc: linux...@kvack.org > Cc: linux-ker...@vger.kernel.org > Cc: Michal Hocko <mho...@suse.com> > Cc: Mel Gorman <mgor...@suse.de> > Cc: Vlastimil Babka <vba...@suse.cz> > Cc: "Kirill A. Shutemov" <kir...@shutemov.name> > Cc: Christopher Lameter <c...@linux.com> > Cc: Michael Ellerman <m...@ellerman.id.au> > Cc: Andrew Morton <a...@linux-foundation.org> > Cc: Linus Torvalds <torva...@linux-foundation.org> > Cc: Gautham R Shenoy <e...@linux.vnet.ibm.com> > Cc: Satheesh Rajendran <sathn...@linux.vnet.ibm.com> > Cc: David Hildenbrand <da...@redhat.com> > Signed-off-by: Srikar Dronamraju <sri...@linux.vnet.ibm.com>
This looks good to me. Reviewed-by: Gautham R. Shenoy <e...@linux.vnet.ibm.com> -- Thanks and Regards gautham.
