Messages in this thread Patch in this message | | | Date | Mon, 06 Feb 2006 22:37:31 +0900 | From | Yasunori Goto <> | Subject | [RFC:PATCH(003/003)] Memory add to onlined node.(For x86_64) |
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This is for x86_64 to add memory which belongs onlined node. This patch is just confirmed compile completion. If there is no objection, I would like to test this.
Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Index: linux-2.6.15/arch/x86_64/mm/init.c =================================================================== --- linux-2.6.15.orig/arch/x86_64/mm/init.c 2006-02-06 16:47:41.000000000 +0900 +++ linux-2.6.15/arch/x86_64/mm/init.c 2006-02-06 18:31:52.000000000 +0900 @@ -26,6 +26,7 @@ #include <linux/dma-mapping.h> #include <linux/module.h> #include <linux/memory_hotplug.h> +#include <linux/acpi.h> #include <asm/processor.h> #include <asm/system.h> @@ -494,11 +495,20 @@ int add_memory(u64 start, u64 size) { - struct pglist_data *pgdat = NODE_DATA(0); - struct zone *zone = pgdat->node_zones + MAX_NR_ZONES-2; + struct pglist_data *pgdat; + struct zone *zone; unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; - int ret; + int ret, node; + + node = acpi_paddr_to_node(start, size); + if (node >= 0 && node_online(node)) + pgdat = NODE_DATA(node); + else + /* New node's memory will be added to Node 0 temporally. */ + pgdat = NODE_DATA(0); + + zone = pgdat->node_zones + MAX_NR_ZONES - 2; ret = __add_pages(zone, start_pfn, nr_pages); if (ret) -- Yasunori Goto
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