Re: [PATCH] mm/slab: Fix undefined init_cache_node_node() for NUMA and !SMP

[Randy Dunlap]

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