From 1e3590e2e4a38e8390fdac5bda23330bf2801838 Mon Sep 17 00:00:00 2001 From: Yasunori Goto Date: Tue, 27 Jun 2006 02:53:31 -0700 Subject: [PATCH] [PATCH] pgdat allocation for new node add (get node id by acpi) 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 Cc: Dave Hansen Cc: "Brown, Len" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/acpi/acpi_memhotplug.c | 3 ++- drivers/acpi/numa.c | 15 ++++++++++++++- include/linux/acpi.h | 6 ++++++ 3 files changed, 22 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c index 0424326eae1..1012284ff4f 100644 --- a/drivers/acpi/acpi_memhotplug.c +++ b/drivers/acpi/acpi_memhotplug.c @@ -215,7 +215,7 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) { int result, num_enabled = 0; struct acpi_memory_info *info; - int node = 0; + int node; ACPI_FUNCTION_TRACE("acpi_memory_enable_device"); @@ -228,6 +228,7 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) 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 diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c index e2c1a16078c..13d6d5bdea2 100644 --- a/drivers/acpi/numa.c +++ b/drivers/acpi/numa.c @@ -254,5 +254,18 @@ int acpi_get_pxm(acpi_handle h) } while (ACPI_SUCCESS(status)); return -1; } - 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); diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 90d6df1551e..88b5dfd8ee1 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -528,12 +528,18 @@ static inline void acpi_set_cstate_limit(unsigned int new_limit) { return; } #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; -- 2.20.1