From bc02af93dd2bbddce1b55e0a493f833a1b7cf140 Mon Sep 17 00:00:00 2001 From: Yasunori Goto Date: Tue, 27 Jun 2006 02:53:30 -0700 Subject: [PATCH] [PATCH] pgdat allocation for new node add (specify node id) Change the name of old add_memory() to arch_add_memory. And use node id to get pgdat for the node at NODE_DATA(). Note: Powerpc's old add_memory() is defined as __devinit. However, add_memory() is usually called only after bootup. I suppose it may be redundant. But, I'm not well known about powerpc. So, I keep it. (But, __meminit is better at least.) Signed-off-by: Yasunori Goto Cc: Dave Hansen Cc: "Brown, Len" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/mm/init.c | 2 +- arch/ia64/mm/init.c | 5 +- arch/powerpc/mm/mem.c | 11 +++-- arch/x86_64/mm/init.c | 84 +++++++++++++++++++--------------- drivers/acpi/Kconfig | 2 +- drivers/acpi/acpi_memhotplug.c | 3 +- drivers/base/memory.c | 4 +- include/linux/memory_hotplug.h | 13 +++++- mm/memory_hotplug.c | 11 +++++ 9 files changed, 87 insertions(+), 48 deletions(-) diff --git a/arch/i386/mm/init.c b/arch/i386/mm/init.c index bf19513f0cea..468592531793 100644 --- a/arch/i386/mm/init.c +++ b/arch/i386/mm/init.c @@ -654,7 +654,7 @@ void __init mem_init(void) */ #ifdef CONFIG_MEMORY_HOTPLUG #ifndef CONFIG_NEED_MULTIPLE_NODES -int add_memory(u64 start, u64 size) +int arch_add_memory(int nid, u64 start, u64 size) { struct pglist_data *pgdata = &contig_page_data; struct zone *zone = pgdata->node_zones + MAX_NR_ZONES-1; diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index 11f08001f8c2..38306e98f04b 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -652,7 +652,7 @@ void online_page(struct page *page) num_physpages++; } -int add_memory(u64 start, u64 size) +int arch_add_memory(int nid, u64 start, u64 size) { pg_data_t *pgdat; struct zone *zone; @@ -660,7 +660,7 @@ int add_memory(u64 start, u64 size) unsigned long nr_pages = size >> PAGE_SHIFT; int ret; - pgdat = NODE_DATA(0); + pgdat = NODE_DATA(nid); zone = pgdat->node_zones + ZONE_NORMAL; ret = __add_pages(zone, start_pfn, nr_pages); @@ -671,7 +671,6 @@ int add_memory(u64 start, u64 size) return ret; } -EXPORT_SYMBOL_GPL(add_memory); int remove_memory(u64 start, u64 size) { diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 69f3b9a20beb..089d939a0b3e 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -114,15 +114,20 @@ void online_page(struct page *page) num_physpages++; } -int __devinit add_memory(u64 start, u64 size) +#ifdef CONFIG_NUMA +int memory_add_physaddr_to_nid(u64 start) +{ + return hot_add_scn_to_nid(start); +} +#endif + +int __devinit arch_add_memory(int nid, u64 start, u64 size) { struct pglist_data *pgdata; struct zone *zone; - int nid; unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; - nid = hot_add_scn_to_nid(start); pgdata = NODE_DATA(nid); start = (unsigned long)__va(start); diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c index 02add1d1dfa8..51fbf3eddf13 100644 --- a/arch/x86_64/mm/init.c +++ b/arch/x86_64/mm/init.c @@ -506,8 +506,6 @@ void __init clear_kernel_mapping(unsigned long address, unsigned long size) /* * Memory hotplug specific functions */ -#if defined(CONFIG_ACPI_HOTPLUG_MEMORY) || defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE) - void online_page(struct page *page) { ClearPageReserved(page); @@ -517,7 +515,52 @@ void online_page(struct page *page) num_physpages++; } -#ifndef CONFIG_MEMORY_HOTPLUG +#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. + */ +int arch_add_memory(int nid, u64 start, u64 size) +{ + struct pglist_data *pgdat = NODE_DATA(nid); + struct zone *zone = pgdat->node_zones + MAX_NR_ZONES-2; + unsigned long start_pfn = start >> PAGE_SHIFT; + unsigned long nr_pages = size >> PAGE_SHIFT; + int ret; + + ret = __add_pages(zone, start_pfn, nr_pages); + if (ret) + goto error; + + init_memory_mapping(start, (start + size -1)); + + return ret; +error: + printk("%s: Problem encountered in __add_pages!\n", __func__); + return ret; +} +EXPORT_SYMBOL_GPL(arch_add_memory); + +int remove_memory(u64 start, u64 size) +{ + return -EINVAL; +} +EXPORT_SYMBOL_GPL(remove_memory); + +#else /* CONFIG_MEMORY_HOTPLUG */ /* * Memory Hotadd without sparsemem. The mem_maps have been allocated in advance, * just online the pages. @@ -543,40 +586,7 @@ int __add_pages(struct zone *z, unsigned long start_pfn, unsigned long nr_pages) } return err; } -#endif - -/* - * Memory is added always to NORMAL zone. This means you will never get - * additional DMA/DMA32 memory. - */ -int add_memory(u64 start, u64 size) -{ - struct pglist_data *pgdat = NODE_DATA(0); - struct zone *zone = pgdat->node_zones + MAX_NR_ZONES-2; - unsigned long start_pfn = start >> PAGE_SHIFT; - unsigned long nr_pages = size >> PAGE_SHIFT; - int ret; - - ret = __add_pages(zone, start_pfn, nr_pages); - if (ret) - goto error; - - init_memory_mapping(start, (start + size -1)); - - return ret; -error: - printk("%s: Problem encountered in __add_pages!\n", __func__); - return ret; -} -EXPORT_SYMBOL_GPL(add_memory); - -int remove_memory(u64 start, u64 size) -{ - return -EINVAL; -} -EXPORT_SYMBOL_GPL(remove_memory); - -#endif +#endif /* CONFIG_MEMORY_HOTPLUG */ static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel, kcore_modules, kcore_vsyscall; diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 94b8d820c512..610d2cc02cf8 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -328,7 +328,7 @@ config ACPI_CONTAINER config ACPI_HOTPLUG_MEMORY tristate "Memory Hotplug" depends on ACPI - depends on MEMORY_HOTPLUG || X86_64 + depends on MEMORY_HOTPLUG default n help This driver adds supports for ACPI Memory Hotplug. This driver diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c index 5652569b3762..0424326eae15 100644 --- a/drivers/acpi/acpi_memhotplug.c +++ b/drivers/acpi/acpi_memhotplug.c @@ -215,6 +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; ACPI_FUNCTION_TRACE("acpi_memory_enable_device"); @@ -245,7 +246,7 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) continue; } - result = add_memory(info->start_addr, info->length); + result = add_memory(node, info->start_addr, info->length); if (result) continue; info->enabled = 1; diff --git a/drivers/base/memory.c b/drivers/base/memory.c index dd547af4681a..c6b7d9c4b651 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -306,11 +306,13 @@ static ssize_t memory_probe_store(struct class *class, const char *buf, size_t count) { u64 phys_addr; + int nid; int ret; phys_addr = simple_strtoull(buf, NULL, 0); - ret = add_memory(phys_addr, PAGES_PER_SECTION << PAGE_SHIFT); + nid = memory_add_physaddr_to_nid(phys_addr); + ret = add_memory(nid, phys_addr, PAGES_PER_SECTION << PAGE_SHIFT); if (ret) count = ret; diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index 911206386171..29c1472efad0 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -63,6 +63,16 @@ extern int online_pages(unsigned long, unsigned long); /* 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); + +#ifdef CONFIG_NUMA +extern int memory_add_physaddr_to_nid(u64 start); +#else +static inline int memory_add_physaddr_to_nid(u64 start) +{ + return 0; +} +#endif + #else /* ! CONFIG_MEMORY_HOTPLUG */ /* * Stub functions for when hotplug is off @@ -99,7 +109,8 @@ static inline int __remove_pages(struct zone *zone, unsigned long start_pfn, return -ENOSYS; } -extern int add_memory(u64 start, u64 size); +extern int add_memory(int nid, u64 start, u64 size); +extern int arch_add_memory(int nid, u64 start, u64 size); extern int remove_memory(u64 start, u64 size); #endif /* __LINUX_MEMORY_HOTPLUG_H */ diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 841a077d5aeb..6cdeabe9f6d4 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -163,3 +163,14 @@ int online_pages(unsigned long pfn, unsigned long nr_pages) vm_total_pages = nr_free_pagecache_pages(); return 0; } + +int add_memory(int nid, u64 start, u64 size) +{ + int ret; + + /* call arch's memory hotadd */ + ret = arch_add_memory(nid, start, size); + + return ret; +} +EXPORT_SYMBOL_GPL(add_memory);