Re: [PATCH v3 3/3] mm/page_alloc: Keep memoryless cpuless node 0 offline

[Christopher Lameter]

On Fri, 1 May 2020, Srikar Dronamraju wrote:

> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -116,8 +116,10 @@ EXPORT_SYMBOL(latent_entropy);
>   */
>  nodemask_t node_states[NR_NODE_STATES] __read_mostly = {
>  	[N_POSSIBLE] = NODE_MASK_ALL,
> +#ifdef CONFIG_NUMA
> +	[N_ONLINE] = NODE_MASK_NONE,

Hmmm.... I would have expected that you would have added something early
in boot that would mark the current node (whatever is is) online instead?