diff options
Diffstat (limited to 'drivers/base/node.c')
| -rw-r--r-- | drivers/base/node.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/drivers/base/node.c b/drivers/base/node.c new file mode 100644 index 00000000000..583d57ec49a --- /dev/null +++ b/drivers/base/node.c @@ -0,0 +1,161 @@ +/* + * drivers/base/node.c - basic Node class support + */ + +#include <linux/sysdev.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/node.h> +#include <linux/hugetlb.h> +#include <linux/cpumask.h> +#include <linux/topology.h> +#include <linux/nodemask.h> + +static struct sysdev_class node_class = { + set_kset_name("node"), +}; + + +static ssize_t node_read_cpumap(struct sys_device * dev, char * buf) +{ + struct node *node_dev = to_node(dev); + cpumask_t mask = node_to_cpumask(node_dev->sysdev.id); + int len; + + /* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */ + BUILD_BUG_ON(MAX_NUMNODES/4 > PAGE_SIZE/2); + + len = cpumask_scnprintf(buf, PAGE_SIZE-1, mask); + len += sprintf(buf + len, "\n"); + return len; +} + +static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumap, NULL); + +#define K(x) ((x) << (PAGE_SHIFT - 10)) +static ssize_t node_read_meminfo(struct sys_device * dev, char * buf) +{ + int n; + int nid = dev->id; + struct sysinfo i; + unsigned long inactive; + unsigned long active; + unsigned long free; + + si_meminfo_node(&i, nid); + __get_zone_counts(&active, &inactive, &free, NODE_DATA(nid)); + + n = sprintf(buf, "\n" + "Node %d MemTotal: %8lu kB\n" + "Node %d MemFree: %8lu kB\n" + "Node %d MemUsed: %8lu kB\n" + "Node %d Active: %8lu kB\n" + "Node %d Inactive: %8lu kB\n" + "Node %d HighTotal: %8lu kB\n" + "Node %d HighFree: %8lu kB\n" + "Node %d LowTotal: %8lu kB\n" + "Node %d LowFree: %8lu kB\n", + nid, K(i.totalram), + nid, K(i.freeram), + nid, K(i.totalram - i.freeram), + nid, K(active), + nid, K(inactive), + nid, K(i.totalhigh), + nid, K(i.freehigh), + nid, K(i.totalram - i.totalhigh), + nid, K(i.freeram - i.freehigh)); + n += hugetlb_report_node_meminfo(nid, buf + n); + return n; +} + +#undef K +static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL); + +static ssize_t node_read_numastat(struct sys_device * dev, char * buf) +{ + unsigned long numa_hit, numa_miss, interleave_hit, numa_foreign; + unsigned long local_node, other_node; + int i, cpu; + pg_data_t *pg = NODE_DATA(dev->id); + numa_hit = 0; + numa_miss = 0; + interleave_hit = 0; + numa_foreign = 0; + local_node = 0; + other_node = 0; + for (i = 0; i < MAX_NR_ZONES; i++) { + struct zone *z = &pg->node_zones[i]; + for (cpu = 0; cpu < NR_CPUS; cpu++) { + struct per_cpu_pageset *ps = &z->pageset[cpu]; + numa_hit += ps->numa_hit; + numa_miss += ps->numa_miss; + numa_foreign += ps->numa_foreign; + interleave_hit += ps->interleave_hit; + local_node += ps->local_node; + other_node += ps->other_node; + } + } + return sprintf(buf, + "numa_hit %lu\n" + "numa_miss %lu\n" + "numa_foreign %lu\n" + "interleave_hit %lu\n" + "local_node %lu\n" + "other_node %lu\n", + numa_hit, + numa_miss, + numa_foreign, + interleave_hit, + local_node, + other_node); +} +static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); + +static ssize_t node_read_distance(struct sys_device * dev, char * buf) +{ + int nid = dev->id; + int len = 0; + int i; + + /* buf currently PAGE_SIZE, need ~4 chars per node */ + BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2); + + for_each_online_node(i) + len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i)); + + len += sprintf(buf + len, "\n"); + return len; +} +static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL); + + +/* + * register_node - Setup a driverfs device for a node. + * @num - Node number to use when creating the device. + * + * Initialize and register the node device. + */ +int __init register_node(struct node *node, int num, struct node *parent) +{ + int error; + + node->sysdev.id = num; + node->sysdev.cls = &node_class; + error = sysdev_register(&node->sysdev); + + if (!error){ + sysdev_create_file(&node->sysdev, &attr_cpumap); + sysdev_create_file(&node->sysdev, &attr_meminfo); + sysdev_create_file(&node->sysdev, &attr_numastat); + sysdev_create_file(&node->sysdev, &attr_distance); + } + return error; +} + + +int __init register_node_type(void) +{ + return sysdev_class_register(&node_class); +} +postcore_initcall(register_node_type); |