Commit 1e3590e2 authored by Yasunori Goto's avatar Yasunori Goto Committed by Linus Torvalds
Browse files

[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: default avatarYasunori Goto <y-goto@jp.fujitsu.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent bc02af93

drivers/acpi/acpi_memhotplug.c

+2 −1
Original line number Diff line number Diff line
@@ -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

drivers/acpi/numa.c

+14 −1
Original line number Diff line number Diff line
@@ -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);

include/linux/acpi.h

+6 −0
Original line number Diff line number Diff line
@@ -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;

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