From 4942e998b40b8f6080930ec16442444e9930aee5 Mon Sep 17 00:00:00 2001 From: Keith Mannthey Date: Sat, 30 Sep 2006 23:27:06 -0700 Subject: [PATCH] [PATCH] hot-add-mem x86_64: memory_add_physaddr_to_nid enable 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 Cc: KAMEZAWA Hiroyuki Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86_64/mm/init.c | 20 +++++++------------- arch/x86_64/mm/srat.c | 13 ++++++++++++- 2 files changed, 19 insertions(+), 14 deletions(-) diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c index 3e16fe08150e..e759109abb36 100644 --- a/arch/x86_64/mm/init.c +++ b/arch/x86_64/mm/init.c @@ -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, diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c index 19396a261e8d..8491300ef909 100644 --- a/arch/x86_64/mm/srat.c +++ b/arch/x86_64/mm/srat.c @@ -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; +} -- 2.20.1