diff options
| -rw-r--r-- | arch/x86/mm/numa_64.c | 213 |
1 files changed, 111 insertions, 102 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c index e7f3f4e9ec8..4faed6a8f3a 100644 --- a/arch/x86/mm/numa_64.c +++ b/arch/x86/mm/numa_64.c @@ -1,7 +1,7 @@ -/* +/* * Generic VM initialization for x86-64 NUMA setups. * Copyright 2002,2003 Andi Kleen, SuSE Labs. - */ + */ #include <linux/kernel.h> #include <linux/mm.h> #include <linux/string.h> @@ -24,6 +24,8 @@ #endif struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; +EXPORT_SYMBOL(node_data); + bootmem_data_t plat_node_bdata[MAX_NUMNODES]; struct memnode memnode; @@ -31,16 +33,19 @@ struct memnode memnode; unsigned char cpu_to_node[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = NUMA_NO_NODE }; +EXPORT_SYMBOL(cpu_to_node); + unsigned char apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = { - [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE + [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE }; + cpumask_t node_to_cpumask[MAX_NUMNODES] __read_mostly; +EXPORT_SYMBOL(node_to_cpumask); int numa_off __initdata; unsigned long __initdata nodemap_addr; unsigned long __initdata nodemap_size; - /* * Given a shift value, try to populate memnodemap[] * Returns : @@ -48,12 +53,11 @@ unsigned long __initdata nodemap_size; * 0 if memnodmap[] too small (of shift too small) * -1 if node overlap or lost ram (shift too big) */ -static int __init -populate_memnodemap(const struct bootnode *nodes, int numnodes, int shift) +static int __init populate_memnodemap(const struct bootnode *nodes, + int numnodes, int shift) { - int i; - int res = -1; unsigned long addr, end; + int i, res = -1; memset(memnodemap, 0xff, memnodemapsize); for (i = 0; i < numnodes; i++) { @@ -70,7 +74,7 @@ populate_memnodemap(const struct bootnode *nodes, int numnodes, int shift) addr += (1UL << shift); } while (addr < end); res = 1; - } + } return res; } @@ -105,8 +109,8 @@ static int __init allocate_cachealigned_memnodemap(void) * The LSB of all start and end addresses in the node map is the value of the * maximum possible shift. */ -static int __init -extract_lsb_from_nodes (const struct bootnode *nodes, int numnodes) +static int __init extract_lsb_from_nodes(const struct bootnode *nodes, + int numnodes) { int i, nodes_used = 0; unsigned long start, end; @@ -141,10 +145,9 @@ int __init compute_hash_shift(struct bootnode *nodes, int numnodes) shift); if (populate_memnodemap(nodes, numnodes, shift) != 1) { - printk(KERN_INFO - "Your memory is not aligned you need to rebuild your kernel " - "with a bigger NODEMAPSIZE shift=%d\n", - shift); + printk(KERN_INFO "Your memory is not aligned you need to " + "rebuild your kernel with a bigger NODEMAPSIZE " + "shift=%d\n", shift); return -1; } return shift; @@ -157,35 +160,37 @@ int early_pfn_to_nid(unsigned long pfn) } #endif -static void * __init -early_node_mem(int nodeid, unsigned long start, unsigned long end, - unsigned long size) +static void * __init early_node_mem(int nodeid, unsigned long start, + unsigned long end, unsigned long size) { unsigned long mem = find_e820_area(start, end, size); void *ptr; + if (mem != -1L) return __va(mem); ptr = __alloc_bootmem_nopanic(size, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)); if (ptr == NULL) { printk(KERN_ERR "Cannot find %lu bytes in node %d\n", - size, nodeid); + size, nodeid); return NULL; } return ptr; } /* Initialize bootmem allocator for a node */ -void __init setup_node_bootmem(int nodeid, unsigned long start, unsigned long end) -{ - unsigned long start_pfn, end_pfn, bootmap_pages, bootmap_size, bootmap_start; - unsigned long nodedata_phys; +void __init setup_node_bootmem(int nodeid, unsigned long start, + unsigned long end) +{ + unsigned long start_pfn, end_pfn, bootmap_pages, bootmap_size; + unsigned long bootmap_start, nodedata_phys; void *bootmap; const int pgdat_size = round_up(sizeof(pg_data_t), PAGE_SIZE); - start = round_up(start, ZONE_ALIGN); + start = round_up(start, ZONE_ALIGN); - printk(KERN_INFO "Bootmem setup node %d %016lx-%016lx\n", nodeid, start, end); + printk(KERN_INFO "Bootmem setup node %d %016lx-%016lx\n", nodeid, + start, end); start_pfn = start >> PAGE_SHIFT; end_pfn = end >> PAGE_SHIFT; @@ -201,75 +206,81 @@ void __init setup_node_bootmem(int nodeid, unsigned long start, unsigned long en NODE_DATA(nodeid)->node_spanned_pages = end_pfn - start_pfn; /* Find a place for the bootmem map */ - bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn); + bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn); bootmap_start = round_up(nodedata_phys + pgdat_size, PAGE_SIZE); bootmap = early_node_mem(nodeid, bootmap_start, end, bootmap_pages<<PAGE_SHIFT); if (bootmap == NULL) { if (nodedata_phys < start || nodedata_phys >= end) - free_bootmem((unsigned long)node_data[nodeid],pgdat_size); + free_bootmem((unsigned long)node_data[nodeid], + pgdat_size); node_data[nodeid] = NULL; return; } bootmap_start = __pa(bootmap); - Dprintk("bootmap start %lu pages %lu\n", bootmap_start, bootmap_pages); - + Dprintk("bootmap start %lu pages %lu\n", bootmap_start, bootmap_pages); + bootmap_size = init_bootmem_node(NODE_DATA(nodeid), - bootmap_start >> PAGE_SHIFT, - start_pfn, end_pfn); + bootmap_start >> PAGE_SHIFT, + start_pfn, end_pfn); free_bootmem_with_active_regions(nodeid, end); - reserve_bootmem_node(NODE_DATA(nodeid), nodedata_phys, pgdat_size); - reserve_bootmem_node(NODE_DATA(nodeid), bootmap_start, bootmap_pages<<PAGE_SHIFT); + reserve_bootmem_node(NODE_DATA(nodeid), nodedata_phys, pgdat_size); + reserve_bootmem_node(NODE_DATA(nodeid), bootmap_start, + bootmap_pages<<PAGE_SHIFT); #ifdef CONFIG_ACPI_NUMA srat_reserve_add_area(nodeid); #endif node_set_online(nodeid); -} +} /* Initialize final allocator for a zone */ void __init setup_node_zones(int nodeid) -{ +{ unsigned long start_pfn, end_pfn, memmapsize, limit; - start_pfn = node_start_pfn(nodeid); - end_pfn = node_end_pfn(nodeid); + start_pfn = node_start_pfn(nodeid); + end_pfn = node_end_pfn(nodeid); Dprintk(KERN_INFO "Setting up memmap for node %d %lx-%lx\n", nodeid, start_pfn, end_pfn); - /* Try to allocate mem_map at end to not fill up precious <4GB - memory. */ + /* + * Try to allocate mem_map at end to not fill up precious <4GB + * memory. + */ memmapsize = sizeof(struct page) * (end_pfn-start_pfn); limit = end_pfn << PAGE_SHIFT; #ifdef CONFIG_FLAT_NODE_MEM_MAP - NODE_DATA(nodeid)->node_mem_map = - __alloc_bootmem_core(NODE_DATA(nodeid)->bdata, - memmapsize, SMP_CACHE_BYTES, - round_down(limit - memmapsize, PAGE_SIZE), - limit); + NODE_DATA(nodeid)->node_mem_map = + __alloc_bootmem_core(NODE_DATA(nodeid)->bdata, + memmapsize, SMP_CACHE_BYTES, + round_down(limit - memmapsize, PAGE_SIZE), + limit); #endif -} +} +/* + * There are unfortunately some poorly designed mainboards around that + * only connect memory to a single CPU. This breaks the 1:1 cpu->node + * mapping. To avoid this fill in the mapping for all possible CPUs, + * as the number of CPUs is not known yet. We round robin the existing + * nodes. + */ void __init numa_init_array(void) { int rr, i; - /* There are unfortunately some poorly designed mainboards around - that only connect memory to a single CPU. This breaks the 1:1 cpu->node - mapping. To avoid this fill in the mapping for all possible - CPUs, as the number of CPUs is not known yet. - We round robin the existing nodes. */ + rr = first_node(node_online_map); for (i = 0; i < NR_CPUS; i++) { if (cpu_to_node(i) != NUMA_NO_NODE) continue; - numa_set_node(i, rr); + numa_set_node(i, rr); rr = next_node(rr, node_online_map); if (rr == MAX_NUMNODES) rr = first_node(node_online_map); } - } #ifdef CONFIG_NUMA_EMU @@ -277,15 +288,17 @@ void __init numa_init_array(void) char *cmdline __initdata; /* - * Setups up nid to range from addr to addr + size. If the end boundary is - * greater than max_addr, then max_addr is used instead. The return value is 0 - * if there is additional memory left for allocation past addr and -1 otherwise. - * addr is adjusted to be at the end of the node. + * Setups up nid to range from addr to addr + size. If the end + * boundary is greater than max_addr, then max_addr is used instead. + * The return value is 0 if there is additional memory left for + * allocation past addr and -1 otherwise. addr is adjusted to be at + * the end of the node. */ static int __init setup_node_range(int nid, struct bootnode *nodes, u64 *addr, u64 size, u64 max_addr) { int ret = 0; + nodes[nid].start = *addr; *addr += size; if (*addr >= max_addr) { @@ -336,6 +349,7 @@ static int __init split_nodes_equally(struct bootnode *nodes, u64 *addr, for (i = node_start; i < num_nodes + node_start; i++) { u64 end = *addr + size; + if (i < big) end += FAKE_NODE_MIN_SIZE; /* @@ -381,14 +395,9 @@ static int __init split_nodes_by_size(struct bootnode *nodes, u64 *addr, static int __init numa_emulation(unsigned long start_pfn, unsigned long end_pfn) { struct bootnode nodes[MAX_NUMNODES]; - u64 addr = start_pfn << PAGE_SHIFT; + u64 size, addr = start_pfn << PAGE_SHIFT; u64 max_addr = end_pfn << PAGE_SHIFT; - int num_nodes = 0; - int coeff_flag; - int coeff = -1; - int num = 0; - u64 size; - int i; + int num_nodes = 0, num = 0, coeff_flag, coeff = -1, i; memset(&nodes, 0, sizeof(nodes)); /* @@ -396,8 +405,9 @@ static int __init numa_emulation(unsigned long start_pfn, unsigned long end_pfn) * system RAM into N fake nodes. */ if (!strchr(cmdline, '*') && !strchr(cmdline, ',')) { - num_nodes = split_nodes_equally(nodes, &addr, max_addr, 0, - simple_strtol(cmdline, NULL, 0)); + long n = simple_strtol(cmdline, NULL, 0); + + num_nodes = split_nodes_equally(nodes, &addr, max_addr, 0, n); if (num_nodes < 0) return num_nodes; goto out; @@ -484,46 +494,47 @@ out: for_each_node_mask(i, node_possible_map) { e820_register_active_regions(i, nodes[i].start >> PAGE_SHIFT, nodes[i].end >> PAGE_SHIFT); - setup_node_bootmem(i, nodes[i].start, nodes[i].end); + setup_node_bootmem(i, nodes[i].start, nodes[i].end); } acpi_fake_nodes(nodes, num_nodes); - numa_init_array(); - return 0; + numa_init_array(); + return 0; } #endif /* CONFIG_NUMA_EMU */ void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn) -{ +{ int i; nodes_clear(node_possible_map); #ifdef CONFIG_NUMA_EMU if (cmdline && !numa_emulation(start_pfn, end_pfn)) - return; + return; nodes_clear(node_possible_map); #endif #ifdef CONFIG_ACPI_NUMA if (!numa_off && !acpi_scan_nodes(start_pfn << PAGE_SHIFT, end_pfn << PAGE_SHIFT)) - return; + return; nodes_clear(node_possible_map); #endif #ifdef CONFIG_K8_NUMA - if (!numa_off && !k8_scan_nodes(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT)) + if (!numa_off && !k8_scan_nodes(start_pfn<<PAGE_SHIFT, + end_pfn<<PAGE_SHIFT)) return; nodes_clear(node_possible_map); #endif printk(KERN_INFO "%s\n", numa_off ? "NUMA turned off" : "No NUMA configuration found"); - printk(KERN_INFO "Faking a node at %016lx-%016lx\n", + printk(KERN_INFO "Faking a node at %016lx-%016lx\n", start_pfn << PAGE_SHIFT, - end_pfn << PAGE_SHIFT); - /* setup dummy node covering all memory */ - memnode_shift = 63; + end_pfn << PAGE_SHIFT); + /* setup dummy node covering all memory */ + memnode_shift = 63; memnodemap = memnode.embedded_map; memnodemap[0] = 0; nodes_clear(node_online_map); @@ -539,7 +550,7 @@ void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn) __cpuinit void numa_add_cpu(int cpu) { set_bit(cpu, &node_to_cpumask[cpu_to_node(cpu)]); -} +} void __cpuinit numa_set_node(int cpu, int node) { @@ -547,20 +558,22 @@ void __cpuinit numa_set_node(int cpu, int node) cpu_to_node(cpu) = node; } -unsigned long __init numa_free_all_bootmem(void) -{ - int i; +unsigned long __init numa_free_all_bootmem(void) +{ unsigned long pages = 0; - for_each_online_node(i) { + int i; + + for_each_online_node(i) pages += free_all_bootmem_node(NODE_DATA(i)); - } + return pages; -} +} void __init paging_init(void) -{ - int i; +{ unsigned long max_zone_pfns[MAX_NR_ZONES]; + int i; + memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN; @@ -569,32 +582,30 @@ void __init paging_init(void) sparse_memory_present_with_active_regions(MAX_NUMNODES); sparse_init(); - for_each_online_node(i) { - setup_node_zones(i); - } + for_each_online_node(i) + setup_node_zones(i); free_area_init_nodes(max_zone_pfns); -} +} static __init int numa_setup(char *opt) -{ +{ if (!opt) return -EINVAL; - if (!strncmp(opt,"off",3)) + if (!strncmp(opt, "off", 3)) numa_off = 1; #ifdef CONFIG_NUMA_EMU if (!strncmp(opt, "fake=", 5)) cmdline = opt + 5; #endif #ifdef CONFIG_ACPI_NUMA - if (!strncmp(opt,"noacpi",6)) - acpi_numa = -1; - if (!strncmp(opt,"hotadd=", 7)) + if (!strncmp(opt, "noacpi", 6)) + acpi_numa = -1; + if (!strncmp(opt, "hotadd=", 7)) hotadd_percent = simple_strtoul(opt+7, NULL, 10); #endif return 0; -} - +} early_param("numa", numa_setup); /* @@ -612,20 +623,18 @@ early_param("numa", numa_setup); void __init init_cpu_to_node(void) { int i; - for (i = 0; i < NR_CPUS; i++) { + + for (i = 0; i < NR_CPUS; i++) { u8 apicid = x86_cpu_to_apicid_init[i]; + if (apicid == BAD_APICID) continue; if (apicid_to_node[apicid] == NUMA_NO_NODE) continue; - numa_set_node(i,apicid_to_node[apicid]); + numa_set_node(i, apicid_to_node[apicid]); } } -EXPORT_SYMBOL(cpu_to_node); -EXPORT_SYMBOL(node_to_cpumask); -EXPORT_SYMBOL(node_data); - #ifdef CONFIG_DISCONTIGMEM /* * Functions to convert PFNs from/to per node page addresses. |