X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fx86_64%2Fmm%2Fnuma.c;h=2ee2e003606cad9cc727042af6ed435dadc45a53;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=22e51beee8d377cc4adcb5173414f7ce2bddadc4;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git

diff --git a/arch/x86_64/mm/numa.c b/arch/x86_64/mm/numa.c
index 22e51beee..2ee2e0036 100644
--- a/arch/x86_64/mm/numa.c
+++ b/arch/x86_64/mm/numa.c
@@ -25,8 +25,7 @@
 struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
 bootmem_data_t plat_node_bdata[MAX_NUMNODES];
 
-int memnode_shift;
-u8  memnodemap[NODEMAPSIZE];
+struct memnode memnode;
 
 unsigned char cpu_to_node[NR_CPUS] __read_mostly = {
 	[0 ... NR_CPUS-1] = NUMA_NO_NODE
@@ -47,7 +46,7 @@ int numa_off __initdata;
  * -1 if node overlap or lost ram (shift too big)
  */
 static int __init
-populate_memnodemap(const struct node *nodes, int numnodes, int shift)
+populate_memnodemap(const struct bootnode *nodes, int numnodes, int shift)
 {
 	int i; 
 	int res = -1;
@@ -74,7 +73,7 @@ populate_memnodemap(const struct node *nodes, int numnodes, int shift)
 	return res;
 }
 
-int __init compute_hash_shift(struct node *nodes, int numnodes)
+int __init compute_hash_shift(struct bootnode *nodes, int numnodes)
 {
 	int shift = 20;
 
@@ -101,11 +100,30 @@ 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)
+{
+	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 == 0) {
+		printk(KERN_ERR "Cannot find %lu bytes in node %d\n",
+			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 *bootmap;
 	const int pgdat_size = round_up(sizeof(pg_data_t), PAGE_SIZE);
 
 	start = round_up(start, ZONE_ALIGN); 
@@ -115,13 +133,11 @@ void __init setup_node_bootmem(int nodeid, unsigned long start, unsigned long en
 	start_pfn = start >> PAGE_SHIFT;
 	end_pfn = end >> PAGE_SHIFT;
 
-	nodedata_phys = find_e820_area(start, end, pgdat_size); 
-	if (nodedata_phys == -1L) 
-		panic("Cannot find memory pgdat in node %d\n", nodeid);
-
-	Dprintk("nodedata_phys %lx\n", nodedata_phys); 
+	node_data[nodeid] = early_node_mem(nodeid, start, end, pgdat_size);
+	if (node_data[nodeid] == NULL)
+		return;
+	nodedata_phys = __pa(node_data[nodeid]);
 
-	node_data[nodeid] = phys_to_virt(nodedata_phys);
 	memset(NODE_DATA(nodeid), 0, sizeof(pg_data_t));
 	NODE_DATA(nodeid)->bdata = &plat_node_bdata[nodeid];
 	NODE_DATA(nodeid)->node_start_pfn = start_pfn;
@@ -130,38 +146,53 @@ void __init setup_node_bootmem(int nodeid, unsigned long start, unsigned long en
 	/* Find a place for the bootmem map */
 	bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn); 
 	bootmap_start = round_up(nodedata_phys + pgdat_size, PAGE_SIZE);
-	bootmap_start = find_e820_area(bootmap_start, end, bootmap_pages<<PAGE_SHIFT);
-	if (bootmap_start == -1L) 
-		panic("Not enough continuous space for bootmap on node %d", nodeid); 
+	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);
+		node_data[nodeid] = NULL;
+		return;
+	}
+	bootmap_start = __pa(bootmap);
 	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); 
 
-	e820_bootmem_free(NODE_DATA(nodeid), start, end);
+	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);
+#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; 
-	unsigned long zones[MAX_NR_ZONES];
-	unsigned long holes[MAX_NR_ZONES];
+	unsigned long start_pfn, end_pfn, memmapsize, limit;
 
  	start_pfn = node_start_pfn(nodeid);
  	end_pfn = node_end_pfn(nodeid);
 
-	Dprintk(KERN_INFO "Setting up node %d %lx-%lx\n",
+	Dprintk(KERN_INFO "Setting up memmap for node %d %lx-%lx\n",
 		nodeid, start_pfn, end_pfn);
 
-	size_zones(zones, holes, start_pfn, end_pfn);
-	free_area_init_node(nodeid, NODE_DATA(nodeid), zones,
-			    start_pfn, holes);
+	/* 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);
+#endif
 } 
 
 void __init numa_init_array(void)
@@ -188,10 +219,10 @@ void __init numa_init_array(void)
 int numa_fake __initdata = 0;
 
 /* Numa emulation */
-static int numa_emulation(unsigned long start_pfn, unsigned long end_pfn)
+static int __init numa_emulation(unsigned long start_pfn, unsigned long end_pfn)
 {
  	int i;
- 	struct node nodes[MAX_NUMNODES];
+ 	struct bootnode nodes[MAX_NUMNODES];
  	unsigned long sz = ((end_pfn - start_pfn)<<PAGE_SHIFT) / numa_fake;
 
  	/* Kludge needed for the hash function */
@@ -222,8 +253,11 @@ static int numa_emulation(unsigned long start_pfn, unsigned long end_pfn)
  		printk(KERN_ERR "No NUMA hash function found. Emulation disabled.\n");
  		return -1;
  	}
- 	for_each_online_node(i)
+ 	for_each_online_node(i) {
+		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);
+	}
  	numa_init_array();
  	return 0;
 }
@@ -262,6 +296,7 @@ void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
 	for (i = 0; i < NR_CPUS; i++)
 		numa_set_node(i, 0);
 	node_to_cpumask[0] = cpumask_of_cpu(0);
+	e820_register_active_regions(0, start_pfn, end_pfn);
 	setup_node_bootmem(0, start_pfn << PAGE_SHIFT, end_pfn << PAGE_SHIFT);
 }
 
@@ -303,17 +338,25 @@ static void __init arch_sparse_init(void)
 void __init paging_init(void)
 { 
 	int i;
+	unsigned long max_zone_pfns[MAX_NR_ZONES];
+	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;
+	max_zone_pfns[ZONE_NORMAL] = end_pfn;
 
 	arch_sparse_init();
 
 	for_each_online_node(i) {
 		setup_node_zones(i); 
 	}
+
+	free_area_init_nodes(max_zone_pfns);
 } 
 
-/* [numa=off] */
-__init int numa_setup(char *opt) 
+static __init int numa_setup(char *opt)
 { 
+	if (!opt)
+		return -EINVAL;
 	if (!strncmp(opt,"off",3))
 		numa_off = 1;
 #ifdef CONFIG_NUMA_EMU
@@ -326,10 +369,14 @@ __init int numa_setup(char *opt)
 #ifdef CONFIG_ACPI_NUMA
  	if (!strncmp(opt,"noacpi",6))
  		acpi_numa = -1;
+	if (!strncmp(opt,"hotadd=", 7))
+		hotadd_percent = simple_strtoul(opt+7, NULL, 10);
 #endif
-	return 1;
+	return 0;
 } 
 
+early_param("numa", numa_setup);
+
 /*
  * Setup early cpu_to_node.
  *
@@ -357,8 +404,7 @@ void __init init_cpu_to_node(void)
 
 EXPORT_SYMBOL(cpu_to_node);
 EXPORT_SYMBOL(node_to_cpumask);
-EXPORT_SYMBOL(memnode_shift);
-EXPORT_SYMBOL(memnodemap);
+EXPORT_SYMBOL(memnode);
 EXPORT_SYMBOL(node_data);
 
 #ifdef CONFIG_DISCONTIGMEM
@@ -369,21 +415,6 @@ EXPORT_SYMBOL(node_data);
  * Should do that.
  */
 
-/* Requires pfn_valid(pfn) to be true */
-struct page *pfn_to_page(unsigned long pfn)
-{
-	int nid = phys_to_nid(((unsigned long)(pfn)) << PAGE_SHIFT);
-	return (pfn - node_start_pfn(nid)) + NODE_DATA(nid)->node_mem_map;
-}
-EXPORT_SYMBOL(pfn_to_page);
-
-unsigned long page_to_pfn(struct page *page)
-{
-	return (long)(((page) - page_zone(page)->zone_mem_map) +
-		      page_zone(page)->zone_start_pfn);
-}
-EXPORT_SYMBOL(page_to_pfn);
-
 int pfn_valid(unsigned long pfn)
 {
 	unsigned nid;