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
* 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 node *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;
+ if (shift >= 64)
+ return -1;
memset(memnodemap, 0xff, sizeof(memnodemap));
for (i = 0; i < numnodes; i++) {
addr = nodes[i].start;
if (memnodemap[addr >> shift] != 0xff)
return -1;
memnodemap[addr >> shift] = i;
- addr += (1 << shift);
+ addr += (1UL << shift);
} while (addr < end);
res = 1;
}
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;
while (populate_memnodemap(nodes, numnodes, shift + 1) >= 0)
shift++;
- printk(KERN_DEBUG "Using %d for the hash shift.\n",
+ printk(KERN_DEBUG "NUMA: Using %d for the hash shift.\n",
shift);
if (populate_memnodemap(nodes, numnodes, shift) != 1) {
}
#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);
- printk("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;
- 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;
/* 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),
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 start_pfn, end_pfn, memmapsize, limit;
unsigned long zones[MAX_NR_ZONES];
unsigned long holes[MAX_NR_ZONES];
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 node %d %lx-%lx\n",
nodeid, start_pfn, end_pfn);
+ /* 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
+
size_zones(zones, holes, start_pfn, end_pfn);
free_area_init_node(nodeid, NODE_DATA(nodeid), zones,
start_pfn, holes);
static int 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 */
while ((x << 1) < sz)
x <<= 1;
if (x < sz/2)
- printk("Numa emulation unbalanced. Complain to maintainer\n");
+ printk(KERN_ERR "Numa emulation unbalanced. Complain to maintainer\n");
sz = x;
}
void __cpuinit numa_set_node(int cpu, int node)
{
- cpu_pda[cpu].nodenumber = node;
+ cpu_pda(cpu)->nodenumber = node;
cpu_to_node[cpu] = node;
}
#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;
}
+/*
+ * Setup early cpu_to_node.
+ *
+ * Populate cpu_to_node[] only if x86_cpu_to_apicid[],
+ * and apicid_to_node[] tables have valid entries for a CPU.
+ * This means we skip cpu_to_node[] initialisation for NUMA
+ * emulation and faking node case (when running a kernel compiled
+ * for NUMA on a non NUMA box), which is OK as cpu_to_node[]
+ * is already initialized in a round robin manner at numa_init_array,
+ * prior to this call, and this initialization is good enough
+ * for the fake NUMA cases.
+ */
+void __init init_cpu_to_node(void)
+{
+ int i;
+ for (i = 0; i < NR_CPUS; i++) {
+ u8 apicid = x86_cpu_to_apicid[i];
+ if (apicid == BAD_APICID)
+ continue;
+ if (apicid_to_node[apicid] == NUMA_NO_NODE)
+ continue;
+ numa_set_node(i,apicid_to_node[apicid]);
+ }
+}
+
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
+/*
+ * Functions to convert PFNs from/to per node page addresses.
+ * These are out of line because they are quite big.
+ * They could be all tuned by pre caching more state.
+ * Should do that.
+ */
+
+int pfn_valid(unsigned long pfn)
+{
+ unsigned nid;
+ if (pfn >= num_physpages)
+ return 0;
+ nid = pfn_to_nid(pfn);
+ if (nid == 0xff)
+ return 0;
+ return pfn >= node_start_pfn(nid) && (pfn) < node_end_pfn(nid);
+}
+EXPORT_SYMBOL(pfn_valid);
+#endif
git.openpandora.org / pandora-kernel.git / blobdiff