[IA64] Simple memory hot-add for ia64. (1681b8e1) · Commits · 戴 / test

First step to memory hotplug for ia64 (add only, all new memory is added to node 0, does not use ZONE_EASY_RECLAIM yet). Signed-off-by:

arch/ia64/mm/init.c

+36 −0

Original line number	Diff line number	Diff line
		@@ -635,3 +635,39 @@ mem_init (void)
		ia32_mem_init();
		#endif
		}

		#ifdef CONFIG_MEMORY_HOTPLUG
		void online_page(struct page *page)
		{
		ClearPageReserved(page);
		set_page_count(page, 1);
		__free_page(page);
		totalram_pages++;
		num_physpages++;
		}

		int add_memory(u64 start, u64 size)
		{
		pg_data_t *pgdat;
		struct zone *zone;
		unsigned long start_pfn = start >> PAGE_SHIFT;
		unsigned long nr_pages = size >> PAGE_SHIFT;
		int ret;

		pgdat = NODE_DATA(0);

		zone = pgdat->node_zones + ZONE_NORMAL;
		ret = __add_pages(zone, start_pfn, nr_pages);

		if (ret)
		printk("%s: Problem encountered in __add_pages() as ret=%d\n",
		__FUNCTION__, ret);

		return ret;
		}

		int remove_memory(u64 start, u64 size)
		{
		return -EINVAL;
		}
		#endif