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[PATCH] pgdat allocation for new node add (get node id by acpi)

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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 <y-goto@jp.fujitsu.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Yasunori Goto 2006-06-27 02:53:31 -07:00 committed by Linus Torvalds
parent bc02af93dd
commit 1e3590e2e4
3 changed files with 22 additions and 2 deletions
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3
drivers/acpi/acpi_memhotplug.c
View file

@ -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

15
drivers/acpi/numa.c
View file

@ -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);

6
include/linux/acpi.h
View file

@ -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;