Messages in this thread Patch in this message | | | Date | Fri, 17 Mar 2006 17:20:53 +0900 | From | Yasunori Goto <> | Subject | [PATCH: 003/017]Memory hotplug for new nodes v.4.(get node id at probe memory) |
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When CONFIG_NUMA && CONFIG_ARCH_MEMORY_PROBE, nid should be defined before calling add_memory(nid, start, size).
Each arch , which supports CONFIG_NUMA && ARCH_MEMORY_PROBE, should define arch_nid_probe(paddr);
Powerpc has nice function. X86_64 has not.....
Note: If memory is hot-plugged by firmware, there is another *good* information like pxm.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
arch/powerpc/mm/mem.c | 5 +++++ drivers/base/memory.c | 3 ++- include/linux/memory_hotplug.h | 9 +++++++++ 3 files changed, 16 insertions(+), 1 deletion(-)
Index: pgdat8/arch/powerpc/mm/mem.c =================================================================== --- pgdat8.orig/arch/powerpc/mm/mem.c 2006-03-17 13:48:31.665710185 +0900 +++ pgdat8/arch/powerpc/mm/mem.c 2006-03-17 13:52:47.538753925 +0900 @@ -114,6 +114,11 @@ void online_page(struct page *page) num_physpages++; } +int arch_nid_probe(u64 start) +{ + return hot_add_scn_to_nid(start); +} + int __meminit arch_add_memory(int nid, u64 start, u64 size) { struct pglist_data *pgdata; Index: pgdat8/include/linux/memory_hotplug.h =================================================================== --- pgdat8.orig/include/linux/memory_hotplug.h 2006-03-17 13:48:31.626647685 +0900 +++ pgdat8/include/linux/memory_hotplug.h 2006-03-17 13:51:28.325864271 +0900 @@ -66,6 +66,15 @@ extern int online_pages(unsigned long, u /* reasonably generic interface to expand the physical pages in a zone */ extern int __add_pages(struct zone *zone, unsigned long start_pfn, unsigned long nr_pages); +#if defined(CONFIG_NUMA) && defined(CONFIG_ARCH_MEMORY_PROBE) +extern int arch_nid_probe(u64 start); +#else +static inline int arch_nid_probe(u64 start) +{ + return 0; +} +#endif + #else /* ! CONFIG_MEMORY_HOTPLUG */ /* * Stub functions for when hotplug is off Index: pgdat8/drivers/base/memory.c =================================================================== --- pgdat8.orig/drivers/base/memory.c 2006-03-17 13:47:31.558289046 +0900 +++ pgdat8/drivers/base/memory.c 2006-03-17 13:51:28.326840833 +0900 @@ -310,7 +310,8 @@ memory_probe_store(struct class *class, phys_addr = simple_strtoull(buf, NULL, 0); - ret = add_memory(phys_addr, PAGES_PER_SECTION << PAGE_SHIFT); + ret = add_memory(arch_nid_probe(phys_addr), + phys_addr, PAGES_PER_SECTION << PAGE_SHIFT); if (ret) count = ret; -- Yasunori Goto
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