Messages in this thread Patch in this message | | | Date | Fri, 4 Aug 2006 07:14:39 -0600 | From | Keith Mannthey <> | Subject | [PATCH 9/10] hot-add-mem x86_64: use CONFIG_MEMORY_HOTPLUG_RESERVE |
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From: Keith Mannthey <kmannth@us.ibm.com>
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> --- init.c | 20 +++++++------------- srat.c | 13 ++++++++++++- 2 files changed, 19 insertions(+), 14 deletions(-)
diff -urN linux-2.6.17/arch/x86_64/mm/init.c current/arch/x86_64/mm/init.c --- linux-2.6.17/arch/x86_64/mm/init.c 2006-08-04 01:30:39.000000000 -0400 +++ current/arch/x86_64/mm/init.c 2006-08-04 01:24:04.000000000 -0400 @@ -517,19 +517,6 @@ #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. */ @@ -560,6 +547,13 @@ } 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 -urN linux-2.6.17/arch/x86_64/mm/srat.c current/arch/x86_64/mm/srat.c --- linux-2.6.17/arch/x86_64/mm/srat.c 2006-08-04 01:31:44.000000000 -0400 +++ current/arch/x86_64/mm/srat.c 2006-08-04 01:24:04.000000000 -0400 @@ -25,7 +25,7 @@ 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; @@ -457,3 +457,14 @@ } 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; +} - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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