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[PATCH] hot-add-mem x86_64: memory_add_physaddr_to_nid enable

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The api for hot-add memory already has a construct for finding nodes based on
an address, memory_add_physaddr_to_nid.  This patch allows the fucntion to do
something besides return 0.  It uses the nodes_add infomation to lookup to
node info for a hot add event.

Signed-off-by: Keith Mannthey <kmannth@us.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Keith Mannthey 2006-09-30 23:27:06 -07:00 committed by Linus Torvalds
parent 71efa8fdc5
commit 4942e998b4
2 changed files with 19 additions and 14 deletions
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20
arch/x86_64/mm/init.c
View file

@ -462,19 +462,6 @@ void online_page(struct page *page)
}
#ifdef CONFIG_MEMORY_HOTPLUG
/*
* XXX: memory_add_physaddr_to_nid() is to find node id from physical address
* via probe interface of sysfs. If acpi notifies hot-add event, then it
* can tell node id by searching dsdt. But, probe interface doesn't have
* node id. So, return 0 as node id at this time.
*/
#ifdef CONFIG_NUMA
int memory_add_physaddr_to_nid(u64 start)
{
return 0;
}
#endif
/*
* Memory is added always to NORMAL zone. This means you will never get
* additional DMA/DMA32 memory.
@ -506,6 +493,13 @@ int remove_memory(u64 start, u64 size)
}
EXPORT_SYMBOL_GPL(remove_memory);
#ifndef CONFIG_ACPI_NUMA
int memory_add_physaddr_to_nid(u64 start)
{
return 0;
}
#endif
#else /* CONFIG_MEMORY_HOTPLUG */
/*
* Memory Hotadd without sparsemem. The mem_maps have been allocated in advance,

13
arch/x86_64/mm/srat.c
View file

@ -27,7 +27,7 @@ static struct acpi_table_slit *acpi_slit;
static nodemask_t nodes_parsed __initdata;
static struct bootnode nodes[MAX_NUMNODES] __initdata;
static struct bootnode nodes_add[MAX_NUMNODES] __initdata;
static struct bootnode nodes_add[MAX_NUMNODES];
static int found_add_area __initdata;
int hotadd_percent __initdata = 0;
@ -466,3 +466,14 @@ int __node_distance(int a, int b)
}
EXPORT_SYMBOL(__node_distance);
int memory_add_physaddr_to_nid(u64 start)
{
int i, ret = 0;
for_each_node(i)
if (nodes_add[i].start <= start && nodes_add[i].end > start)
ret = i;
return ret;
}