Re: [PATCH v4 1/2] mm/memory_hotplug: Add support to accept memory during hot-add

["David Hildenbrand (arm)" <david@kernel.org>]

>   #endif
>   
>   static inline bool pfn_is_unaccepted_memory(unsigned long pfn)
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index a63ec679d861..549ccfd190ee 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -1567,6 +1567,8 @@ int add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
>   	if (!strcmp(res->name, "System RAM"))
>   		firmware_map_add_hotplug(start, start + size, "System RAM");
>   
> +	accept_hotplug_memory(start, size);
> +
>   	/* device_online() will take the lock when calling online_pages() */
>   	mem_hotplug_done();
>   

I really hate that accepting (and un-accepting) hotplugged memory is 
different to accepting ordinary boot memory.

Is there really no way we can get a reasonable implementation where we 
just call a generic accept_memory() and it will know what to do?

-- 
Cheers,

David