[net-next-2.6.git] / arch / x86 / mm / numa.c

/* Common code for 32 and 64-bit NUMA */
#include <linux/topology.h>
#include <linux/module.h>
#include <linux/bootmem.h>

/*
 * Which logical CPUs are on which nodes
 */
cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
EXPORT_SYMBOL(node_to_cpumask_map);

/*
 * Allocate node_to_cpumask_map based on number of available nodes
 * Requires node_possible_map to be valid.
 *
 * Note: node_to_cpumask() is not valid until after this is done.
 * (Use CONFIG_DEBUG_PER_CPU_MAPS to check this.)
 */
void __init setup_node_to_cpumask_map(void)
{
	unsigned int node, num = 0;

	/* setup nr_node_ids if not done yet */
	if (nr_node_ids == MAX_NUMNODES) {
		for_each_node_mask(node, node_possible_map)
			num = node;
		nr_node_ids = num + 1;
	}

	/* allocate the map */
	for (node = 0; node < nr_node_ids; node++)
		alloc_bootmem_cpumask_var(&node_to_cpumask_map[node]);

	/* cpumask_of_node() will now work */
	pr_debug("Node to cpumask map for %d nodes\n", nr_node_ids);
}

#ifdef CONFIG_DEBUG_PER_CPU_MAPS
/*
 * Returns a pointer to the bitmask of CPUs on Node 'node'.
 */
const struct cpumask *cpumask_of_node(int node)
{
	if (node >= nr_node_ids) {
		printk(KERN_WARNING
			"cpumask_of_node(%d): node > nr_node_ids(%d)\n",
			node, nr_node_ids);
		dump_stack();
		return cpu_none_mask;
	}
	if (node_to_cpumask_map[node] == NULL) {
		printk(KERN_WARNING
			"cpumask_of_node(%d): no node_to_cpumask_map!\n",
			node);
		dump_stack();
		return cpu_online_mask;
	}
	return node_to_cpumask_map[node];
}
EXPORT_SYMBOL(cpumask_of_node);
#endif
Commit	Line	Data
71ee73e7 RR	1	/* Common code for 32 and 64-bit NUMA */
	2	#include <linux/topology.h>
	3	#include <linux/module.h>
	4	#include <linux/bootmem.h>
	5
71ee73e7 RR	6	/*
	7	* Which logical CPUs are on which nodes
	8	*/
c032ef60	9	cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
71ee73e7 RR	10	EXPORT_SYMBOL(node_to_cpumask_map);
	11
	12	/*
	13	* Allocate node_to_cpumask_map based on number of available nodes
	14	* Requires node_possible_map to be valid.
	15	*
	16	* Note: node_to_cpumask() is not valid until after this is done.
	17	* (Use CONFIG_DEBUG_PER_CPU_MAPS to check this.)
	18	*/
	19	void __init setup_node_to_cpumask_map(void)
	20	{
	21	unsigned int node, num = 0;
71ee73e7 RR	22
	23	/* setup nr_node_ids if not done yet */
	24	if (nr_node_ids == MAX_NUMNODES) {
	25	for_each_node_mask(node, node_possible_map)
	26	num = node;
	27	nr_node_ids = num + 1;
	28	}
	29
	30	/* allocate the map */
c032ef60 RR	31	for (node = 0; node < nr_node_ids; node++)
c032ef60 RR	32	alloc_bootmem_cpumask_var(&node_to_cpumask_map[node]);
71ee73e7	33
c032ef60 RR	34	/* cpumask_of_node() will now work */
c032ef60 RR	35	pr_debug("Node to cpumask map for %d nodes\n", nr_node_ids);
71ee73e7 RR	36	}
	37
	38	#ifdef CONFIG_DEBUG_PER_CPU_MAPS
	39	/*
	40	* Returns a pointer to the bitmask of CPUs on Node 'node'.
	41	*/
73e907de	42	const struct cpumask *cpumask_of_node(int node)
71ee73e7	43	{
71ee73e7 RR	44	if (node >= nr_node_ids) {
	45	printk(KERN_WARNING
	46	"cpumask_of_node(%d): node > nr_node_ids(%d)\n",
	47	node, nr_node_ids);
	48	dump_stack();
	49	return cpu_none_mask;
	50	}
c032ef60 RR	51	if (node_to_cpumask_map[node] == NULL) {
	52	printk(KERN_WARNING
	53	"cpumask_of_node(%d): no node_to_cpumask_map!\n",
	54	node);
	55	dump_stack();
	56	return cpu_online_mask;
	57	}
0b966252	58	return node_to_cpumask_map[node];
71ee73e7 RR	59	}
	60	EXPORT_SYMBOL(cpumask_of_node);
	61	#endif