Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/base/node.c - basic Node class support | |
3 | */ | |
4 | ||
5 | #include <linux/sysdev.h> | |
6 | #include <linux/module.h> | |
7 | #include <linux/init.h> | |
8 | #include <linux/mm.h> | |
9 | #include <linux/node.h> | |
10 | #include <linux/hugetlb.h> | |
11 | #include <linux/cpumask.h> | |
12 | #include <linux/topology.h> | |
13 | #include <linux/nodemask.h> | |
14 | ||
15 | static struct sysdev_class node_class = { | |
16 | set_kset_name("node"), | |
17 | }; | |
18 | ||
19 | ||
20 | static ssize_t node_read_cpumap(struct sys_device * dev, char * buf) | |
21 | { | |
22 | struct node *node_dev = to_node(dev); | |
23 | cpumask_t mask = node_to_cpumask(node_dev->sysdev.id); | |
24 | int len; | |
25 | ||
26 | /* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */ | |
27 | BUILD_BUG_ON(MAX_NUMNODES/4 > PAGE_SIZE/2); | |
28 | ||
29 | len = cpumask_scnprintf(buf, PAGE_SIZE-1, mask); | |
30 | len += sprintf(buf + len, "\n"); | |
31 | return len; | |
32 | } | |
33 | ||
34 | static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumap, NULL); | |
35 | ||
36 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
37 | static ssize_t node_read_meminfo(struct sys_device * dev, char * buf) | |
38 | { | |
39 | int n; | |
40 | int nid = dev->id; | |
41 | struct sysinfo i; | |
42 | unsigned long inactive; | |
43 | unsigned long active; | |
44 | unsigned long free; | |
45 | ||
46 | si_meminfo_node(&i, nid); | |
47 | __get_zone_counts(&active, &inactive, &free, NODE_DATA(nid)); | |
48 | ||
49 | n = sprintf(buf, "\n" | |
50 | "Node %d MemTotal: %8lu kB\n" | |
51 | "Node %d MemFree: %8lu kB\n" | |
52 | "Node %d MemUsed: %8lu kB\n" | |
53 | "Node %d Active: %8lu kB\n" | |
54 | "Node %d Inactive: %8lu kB\n" | |
55 | "Node %d HighTotal: %8lu kB\n" | |
56 | "Node %d HighFree: %8lu kB\n" | |
57 | "Node %d LowTotal: %8lu kB\n" | |
58 | "Node %d LowFree: %8lu kB\n", | |
59 | nid, K(i.totalram), | |
60 | nid, K(i.freeram), | |
61 | nid, K(i.totalram - i.freeram), | |
62 | nid, K(active), | |
63 | nid, K(inactive), | |
64 | nid, K(i.totalhigh), | |
65 | nid, K(i.freehigh), | |
66 | nid, K(i.totalram - i.totalhigh), | |
67 | nid, K(i.freeram - i.freehigh)); | |
68 | n += hugetlb_report_node_meminfo(nid, buf + n); | |
69 | return n; | |
70 | } | |
71 | ||
72 | #undef K | |
73 | static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL); | |
74 | ||
75 | static ssize_t node_read_numastat(struct sys_device * dev, char * buf) | |
76 | { | |
77 | unsigned long numa_hit, numa_miss, interleave_hit, numa_foreign; | |
78 | unsigned long local_node, other_node; | |
79 | int i, cpu; | |
80 | pg_data_t *pg = NODE_DATA(dev->id); | |
81 | numa_hit = 0; | |
82 | numa_miss = 0; | |
83 | interleave_hit = 0; | |
84 | numa_foreign = 0; | |
85 | local_node = 0; | |
86 | other_node = 0; | |
87 | for (i = 0; i < MAX_NR_ZONES; i++) { | |
88 | struct zone *z = &pg->node_zones[i]; | |
89 | for (cpu = 0; cpu < NR_CPUS; cpu++) { | |
90 | struct per_cpu_pageset *ps = &z->pageset[cpu]; | |
91 | numa_hit += ps->numa_hit; | |
92 | numa_miss += ps->numa_miss; | |
93 | numa_foreign += ps->numa_foreign; | |
94 | interleave_hit += ps->interleave_hit; | |
95 | local_node += ps->local_node; | |
96 | other_node += ps->other_node; | |
97 | } | |
98 | } | |
99 | return sprintf(buf, | |
100 | "numa_hit %lu\n" | |
101 | "numa_miss %lu\n" | |
102 | "numa_foreign %lu\n" | |
103 | "interleave_hit %lu\n" | |
104 | "local_node %lu\n" | |
105 | "other_node %lu\n", | |
106 | numa_hit, | |
107 | numa_miss, | |
108 | numa_foreign, | |
109 | interleave_hit, | |
110 | local_node, | |
111 | other_node); | |
112 | } | |
113 | static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); | |
114 | ||
115 | static ssize_t node_read_distance(struct sys_device * dev, char * buf) | |
116 | { | |
117 | int nid = dev->id; | |
118 | int len = 0; | |
119 | int i; | |
120 | ||
121 | /* buf currently PAGE_SIZE, need ~4 chars per node */ | |
122 | BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2); | |
123 | ||
124 | for_each_online_node(i) | |
125 | len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i)); | |
126 | ||
127 | len += sprintf(buf + len, "\n"); | |
128 | return len; | |
129 | } | |
130 | static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL); | |
131 | ||
132 | ||
133 | /* | |
134 | * register_node - Setup a driverfs device for a node. | |
135 | * @num - Node number to use when creating the device. | |
136 | * | |
137 | * Initialize and register the node device. | |
138 | */ | |
139 | int __init register_node(struct node *node, int num, struct node *parent) | |
140 | { | |
141 | int error; | |
142 | ||
143 | node->sysdev.id = num; | |
144 | node->sysdev.cls = &node_class; | |
145 | error = sysdev_register(&node->sysdev); | |
146 | ||
147 | if (!error){ | |
148 | sysdev_create_file(&node->sysdev, &attr_cpumap); | |
149 | sysdev_create_file(&node->sysdev, &attr_meminfo); | |
150 | sysdev_create_file(&node->sysdev, &attr_numastat); | |
151 | sysdev_create_file(&node->sysdev, &attr_distance); | |
152 | } | |
153 | return error; | |
154 | } | |
155 | ||
156 | ||
157 | int __init register_node_type(void) | |
158 | { | |
159 | return sysdev_class_register(&node_class); | |
160 | } | |
161 | postcore_initcall(register_node_type); |