diff options
| -rw-r--r-- | arch/x86_64/kernel/e820.c | 7 | ||||
| -rw-r--r-- | arch/x86_64/kernel/setup.c | 5 | ||||
| -rw-r--r-- | arch/x86_64/mm/numa.c | 74 | ||||
| -rw-r--r-- | include/asm-x86_64/e820.h | 1 | ||||
| -rw-r--r-- | include/asm-x86_64/mmzone.h | 13 |
5 files changed, 85 insertions, 15 deletions
diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c index 6fe191c58084..9d67955bbc31 100644 --- a/arch/x86_64/kernel/e820.c +++ b/arch/x86_64/kernel/e820.c @@ -83,6 +83,13 @@ static inline int bad_addr(unsigned long *addrp, unsigned long size) return 1; } +#ifdef CONFIG_NUMA + /* NUMA memory to node map */ + if (last >= nodemap_addr && addr < nodemap_addr + nodemap_size) { + *addrp = nodemap_addr + nodemap_size; + return 1; + } +#endif /* XXX ramdisk image here? */ return 0; } diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c index 60477244d1a3..f330f8285499 100644 --- a/arch/x86_64/kernel/setup.c +++ b/arch/x86_64/kernel/setup.c @@ -444,6 +444,11 @@ void __init setup_arch(char **cmdline_p) /* reserve ebda region */ if (ebda_addr) reserve_bootmem_generic(ebda_addr, ebda_size); +#ifdef CONFIG_NUMA + /* reserve nodemap region */ + if (nodemap_addr) + reserve_bootmem_generic(nodemap_addr, nodemap_size); +#endif #ifdef CONFIG_SMP /* diff --git a/arch/x86_64/mm/numa.c b/arch/x86_64/mm/numa.c index 2ee2e003606c..7d9c428f4094 100644 --- a/arch/x86_64/mm/numa.c +++ b/arch/x86_64/mm/numa.c @@ -36,6 +36,8 @@ unsigned char apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = { cpumask_t node_to_cpumask[MAX_NUMNODES] __read_mostly; int numa_off __initdata; +unsigned long __initdata nodemap_addr; +unsigned long __initdata nodemap_size; /* @@ -52,34 +54,87 @@ populate_memnodemap(const struct bootnode *nodes, int numnodes, int shift) int res = -1; unsigned long addr, end; - if (shift >= 64) - return -1; - memset(memnodemap, 0xff, sizeof(memnodemap)); + memset(memnodemap, 0xff, memnodemapsize); for (i = 0; i < numnodes; i++) { addr = nodes[i].start; end = nodes[i].end; if (addr >= end) continue; - if ((end >> shift) >= NODEMAPSIZE) + if ((end >> shift) >= memnodemapsize) return 0; do { if (memnodemap[addr >> shift] != 0xff) return -1; memnodemap[addr >> shift] = i; - addr += (1UL << shift); + addr += (1UL << shift); } while (addr < end); res = 1; } return res; } -int __init compute_hash_shift(struct bootnode *nodes, int numnodes) +static int __init allocate_cachealigned_memnodemap(void) +{ + unsigned long pad, pad_addr; + + memnodemap = memnode.embedded_map; + if (memnodemapsize <= 48) { + printk(KERN_DEBUG "NUMA: Allocated memnodemap from %lx - %lx\n", + nodemap_addr, nodemap_addr + nodemap_size); + return 0; + } + + pad = L1_CACHE_BYTES - 1; + pad_addr = 0x8000; + nodemap_size = pad + memnodemapsize; + nodemap_addr = find_e820_area(pad_addr, end_pfn<<PAGE_SHIFT, + nodemap_size); + if (nodemap_addr == -1UL) { + printk(KERN_ERR + "NUMA: Unable to allocate Memory to Node hash map\n"); + nodemap_addr = nodemap_size = 0; + return -1; + } + pad_addr = (nodemap_addr + pad) & ~pad; + memnodemap = phys_to_virt(pad_addr); + + printk(KERN_DEBUG "NUMA: Allocated memnodemap from %lx - %lx\n", + nodemap_addr, nodemap_addr + nodemap_size); + return 0; +} + +/* + * 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) { - int shift = 20; + int i; + unsigned long start, end; + unsigned long bitfield = 0, memtop = 0; - while (populate_memnodemap(nodes, numnodes, shift + 1) >= 0) - shift++; + for (i = 0; i < numnodes; i++) { + start = nodes[i].start; + end = nodes[i].end; + if (start >= end) + continue; + bitfield |= start | end; + if (end > memtop) + memtop = end; + } + i = find_first_bit(&bitfield, sizeof(unsigned long)*8); + memnodemapsize = (memtop >> i)+1; + return i; +} + +int __init compute_hash_shift(struct bootnode *nodes, int numnodes) +{ + int shift; + shift = extract_lsb_from_nodes(nodes, numnodes); + if (allocate_cachealigned_memnodemap()) + return -1; printk(KERN_DEBUG "NUMA: Using %d for the hash shift.\n", shift); @@ -290,6 +345,7 @@ void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn) 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); node_set_online(0); diff --git a/include/asm-x86_64/e820.h b/include/asm-x86_64/e820.h index fa2086774105..855fb4a454b6 100644 --- a/include/asm-x86_64/e820.h +++ b/include/asm-x86_64/e820.h @@ -56,6 +56,7 @@ extern void finish_e820_parsing(void); extern struct e820map e820; extern unsigned ebda_addr, ebda_size; +extern unsigned long nodemap_addr, nodemap_size; #endif/*!__ASSEMBLY__*/ #endif/*__E820_HEADER*/ diff --git a/include/asm-x86_64/mmzone.h b/include/asm-x86_64/mmzone.h index c38ebdf6f426..39ef106986eb 100644 --- a/include/asm-x86_64/mmzone.h +++ b/include/asm-x86_64/mmzone.h @@ -11,24 +11,25 @@ #include <asm/smp.h> -/* Should really switch to dynamic allocation at some point */ -#define NODEMAPSIZE 0x4fff - /* Simple perfect hash to map physical addresses to node numbers */ struct memnode { int shift; - u8 map[NODEMAPSIZE]; -} ____cacheline_aligned; + unsigned int mapsize; + u8 *map; + u8 embedded_map[64-16]; +} ____cacheline_aligned; /* total size = 64 bytes */ extern struct memnode memnode; #define memnode_shift memnode.shift #define memnodemap memnode.map +#define memnodemapsize memnode.mapsize extern struct pglist_data *node_data[]; static inline __attribute__((pure)) int phys_to_nid(unsigned long addr) { unsigned nid; - VIRTUAL_BUG_ON((addr >> memnode_shift) >= NODEMAPSIZE); + VIRTUAL_BUG_ON(!memnodemap); + VIRTUAL_BUG_ON((addr >> memnode_shift) >= memnodemapsize); nid = memnodemap[addr >> memnode_shift]; VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]); return nid; |