On 3/21/23 09:40, Matthew Wilcox wrote: > On Tue, Mar 21, 2023 at 09:30:59AM +0100, Geert Uytterhoeven wrote: >> -#if (defined(CONFIG_NUMA) && defined(CONFIG_MEMORY_HOTPLUG)) || defined(CONFIG_SMP) >> +#if defined(CONFIG_NUMA) || defined(CONFIG_SMP) > > I'm amused by the thought of CONFIG_NUMA without CONFIG_SMP. > Is it possible to have one node with memory and a single CPU, then > another node with memory and no CPU? More likely 1 with CPU+memory, 1 with memory only. I've been told that that are also I/O-only nodes. -- ~Randy