From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 20 Apr 2006 19:10:08 +0900 From: Yasunori Goto Subject: [Patch: 002/006] pgdat allocation for new node add (get node id by acpi) In-Reply-To: <20060420185123.EE48.Y-GOTO@jp.fujitsu.com> References: <20060420185123.EE48.Y-GOTO@jp.fujitsu.com> Message-Id: <20060420190511.EE4C.Y-GOTO@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: Linux Kernel ML , linux-mm List-ID: This is to find node id from acpi's handle of memory_device in DSDT. _PXM for the new node can be found by acpi_get_pxm() by using new memory's handle. So, node id can be found by pxm_to_nid_map[]. This patch becomes simpler than v2 of node hot-add patch. Because old add_memory() function doesn't have node id parameter. So, kernel must find its handle by physical address via DSDT again. But, v3 just give node id to add_memory() now. Signed-off-by: Yasunori Goto drivers/acpi/acpi_memhotplug.c | 3 ++- drivers/acpi/numa.c | 15 +++++++++++++++ include/linux/acpi.h | 6 ++++++ 3 files changed, 23 insertions(+), 1 deletion(-) Index: pgdat11/drivers/acpi/acpi_memhotplug.c =================================================================== --- pgdat11.orig/drivers/acpi/acpi_memhotplug.c 2006-04-20 11:00:09.000000000 +0900 +++ pgdat11/drivers/acpi/acpi_memhotplug.c 2006-04-20 11:00:17.000000000 +0900 @@ -215,7 +215,7 @@ static int acpi_memory_enable_device(str { int result, num_enabled = 0; struct acpi_memory_info *info; - int node = 0; + int node; ACPI_FUNCTION_TRACE("acpi_memory_enable_device"); @@ -227,6 +227,7 @@ static int acpi_memory_enable_device(str return result; } + node = acpi_get_node(mem_device->handle); /* * Tell the VM there is more memory here... * Note: Assume that this function returns zero on success Index: pgdat11/drivers/acpi/numa.c =================================================================== --- pgdat11.orig/drivers/acpi/numa.c 2006-04-20 11:00:04.000000000 +0900 +++ pgdat11/drivers/acpi/numa.c 2006-04-20 11:00:17.000000000 +0900 @@ -256,3 +256,18 @@ int acpi_get_pxm(acpi_handle h) } EXPORT_SYMBOL(acpi_get_pxm); + +int acpi_get_node(acpi_handle *handle) +{ + int pxm, node = -1; + + ACPI_FUNCTION_TRACE("acpi_get_node"); + + pxm = acpi_get_pxm(handle); + if (pxm >= 0) + node = acpi_map_pxm_to_node(pxm); + + return_VALUE(node); +} + +EXPORT_SYMBOL(acpi_get_node); Index: pgdat11/include/linux/acpi.h =================================================================== --- pgdat11.orig/include/linux/acpi.h 2006-04-20 11:00:07.000000000 +0900 +++ pgdat11/include/linux/acpi.h 2006-04-20 11:00:17.000000000 +0900 @@ -529,12 +529,18 @@ static inline void acpi_set_cstate_limit #ifdef CONFIG_ACPI_NUMA int acpi_get_pxm(acpi_handle handle); +int acpi_get_node(acpi_handle *handle); #else static inline int acpi_get_pxm(acpi_handle handle) { return 0; } +static inline int acpi_get_node(acpi_handle *handle) +{ + return 0; +} #endif +extern int acpi_paddr_to_node(u64 start_addr, u64 size); extern int pnpacpi_disabled; -- Yasunori Goto -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org