Re: [RFC 1/4] mm: Define coherent device memory node

[Dave Hansen]

On 11/22/2016 06:19 AM, Anshuman Khandual wrote:
> @@ -393,6 +393,9 @@ enum node_states {
>  	N_MEMORY = N_HIGH_MEMORY,
>  #endif
>  	N_CPU,		/* The node has one or more cpus */
> +#ifdef CONFIG_COHERENT_DEVICE
> +	N_COHERENT_DEVICE,
> +#endif
>  	NR_NODE_STATES
>  };

Don't we really want this to be N_MEMORY_ISOLATED?  Or, better yet,
N_MEMORY_UNISOLATED so that we can just drop the bitmap in for N_MEMORY
and not have to do any bit manipulation operations at runtime.