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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; | |
c07e02db | 42 | struct page_state ps; |
1da177e4 LT |
43 | unsigned long inactive; |
44 | unsigned long active; | |
45 | unsigned long free; | |
46 | ||
47 | si_meminfo_node(&i, nid); | |
c07e02db | 48 | get_page_state_node(&ps, nid); |
1da177e4 LT |
49 | __get_zone_counts(&active, &inactive, &free, NODE_DATA(nid)); |
50 | ||
c07e02db MH |
51 | /* Check for negative values in these approximate counters */ |
52 | if ((long)ps.nr_dirty < 0) | |
53 | ps.nr_dirty = 0; | |
54 | if ((long)ps.nr_writeback < 0) | |
55 | ps.nr_writeback = 0; | |
56 | if ((long)ps.nr_mapped < 0) | |
57 | ps.nr_mapped = 0; | |
58 | if ((long)ps.nr_slab < 0) | |
59 | ps.nr_slab = 0; | |
60 | ||
1da177e4 LT |
61 | n = sprintf(buf, "\n" |
62 | "Node %d MemTotal: %8lu kB\n" | |
63 | "Node %d MemFree: %8lu kB\n" | |
64 | "Node %d MemUsed: %8lu kB\n" | |
65 | "Node %d Active: %8lu kB\n" | |
66 | "Node %d Inactive: %8lu kB\n" | |
67 | "Node %d HighTotal: %8lu kB\n" | |
68 | "Node %d HighFree: %8lu kB\n" | |
69 | "Node %d LowTotal: %8lu kB\n" | |
c07e02db MH |
70 | "Node %d LowFree: %8lu kB\n" |
71 | "Node %d Dirty: %8lu kB\n" | |
72 | "Node %d Writeback: %8lu kB\n" | |
73 | "Node %d Mapped: %8lu kB\n" | |
74 | "Node %d Slab: %8lu kB\n", | |
1da177e4 LT |
75 | nid, K(i.totalram), |
76 | nid, K(i.freeram), | |
77 | nid, K(i.totalram - i.freeram), | |
78 | nid, K(active), | |
79 | nid, K(inactive), | |
80 | nid, K(i.totalhigh), | |
81 | nid, K(i.freehigh), | |
82 | nid, K(i.totalram - i.totalhigh), | |
c07e02db MH |
83 | nid, K(i.freeram - i.freehigh), |
84 | nid, K(ps.nr_dirty), | |
85 | nid, K(ps.nr_writeback), | |
86 | nid, K(ps.nr_mapped), | |
87 | nid, K(ps.nr_slab)); | |
1da177e4 LT |
88 | n += hugetlb_report_node_meminfo(nid, buf + n); |
89 | return n; | |
90 | } | |
91 | ||
92 | #undef K | |
93 | static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL); | |
94 | ||
95 | static ssize_t node_read_numastat(struct sys_device * dev, char * buf) | |
96 | { | |
97 | unsigned long numa_hit, numa_miss, interleave_hit, numa_foreign; | |
98 | unsigned long local_node, other_node; | |
99 | int i, cpu; | |
100 | pg_data_t *pg = NODE_DATA(dev->id); | |
101 | numa_hit = 0; | |
102 | numa_miss = 0; | |
103 | interleave_hit = 0; | |
104 | numa_foreign = 0; | |
105 | local_node = 0; | |
106 | other_node = 0; | |
107 | for (i = 0; i < MAX_NR_ZONES; i++) { | |
108 | struct zone *z = &pg->node_zones[i]; | |
54404e72 | 109 | for_each_online_cpu(cpu) { |
e7c8d5c9 | 110 | struct per_cpu_pageset *ps = zone_pcp(z,cpu); |
1da177e4 LT |
111 | numa_hit += ps->numa_hit; |
112 | numa_miss += ps->numa_miss; | |
113 | numa_foreign += ps->numa_foreign; | |
114 | interleave_hit += ps->interleave_hit; | |
115 | local_node += ps->local_node; | |
116 | other_node += ps->other_node; | |
117 | } | |
118 | } | |
119 | return sprintf(buf, | |
120 | "numa_hit %lu\n" | |
121 | "numa_miss %lu\n" | |
122 | "numa_foreign %lu\n" | |
123 | "interleave_hit %lu\n" | |
124 | "local_node %lu\n" | |
125 | "other_node %lu\n", | |
126 | numa_hit, | |
127 | numa_miss, | |
128 | numa_foreign, | |
129 | interleave_hit, | |
130 | local_node, | |
131 | other_node); | |
132 | } | |
133 | static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); | |
134 | ||
135 | static ssize_t node_read_distance(struct sys_device * dev, char * buf) | |
136 | { | |
137 | int nid = dev->id; | |
138 | int len = 0; | |
139 | int i; | |
140 | ||
141 | /* buf currently PAGE_SIZE, need ~4 chars per node */ | |
142 | BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2); | |
143 | ||
144 | for_each_online_node(i) | |
145 | len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i)); | |
146 | ||
147 | len += sprintf(buf + len, "\n"); | |
148 | return len; | |
149 | } | |
150 | static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL); | |
151 | ||
152 | ||
153 | /* | |
154 | * register_node - Setup a driverfs device for a node. | |
155 | * @num - Node number to use when creating the device. | |
156 | * | |
157 | * Initialize and register the node device. | |
158 | */ | |
4b45099b | 159 | int register_node(struct node *node, int num, struct node *parent) |
1da177e4 LT |
160 | { |
161 | int error; | |
162 | ||
163 | node->sysdev.id = num; | |
164 | node->sysdev.cls = &node_class; | |
165 | error = sysdev_register(&node->sysdev); | |
166 | ||
167 | if (!error){ | |
168 | sysdev_create_file(&node->sysdev, &attr_cpumap); | |
169 | sysdev_create_file(&node->sysdev, &attr_meminfo); | |
170 | sysdev_create_file(&node->sysdev, &attr_numastat); | |
171 | sysdev_create_file(&node->sysdev, &attr_distance); | |
172 | } | |
173 | return error; | |
174 | } | |
175 | ||
4b45099b KT |
176 | /** |
177 | * unregister_node - unregister a node device | |
178 | * @node: node going away | |
179 | * | |
180 | * Unregisters a node device @node. All the devices on the node must be | |
181 | * unregistered before calling this function. | |
182 | */ | |
183 | void unregister_node(struct node *node) | |
184 | { | |
185 | sysdev_remove_file(&node->sysdev, &attr_cpumap); | |
186 | sysdev_remove_file(&node->sysdev, &attr_meminfo); | |
187 | sysdev_remove_file(&node->sysdev, &attr_numastat); | |
188 | sysdev_remove_file(&node->sysdev, &attr_distance); | |
189 | ||
190 | sysdev_unregister(&node->sysdev); | |
191 | } | |
1da177e4 | 192 | |
0fc44159 YG |
193 | struct node node_devices[MAX_NUMNODES]; |
194 | ||
195 | int register_one_node(int nid) | |
196 | { | |
197 | int error = 0; | |
198 | ||
199 | if (node_online(nid)) { | |
200 | int p_node = parent_node(nid); | |
201 | struct node *parent = NULL; | |
202 | ||
203 | if (p_node != nid) | |
204 | parent = &node_devices[p_node]; | |
205 | ||
206 | error = register_node(&node_devices[nid], nid, parent); | |
207 | } | |
208 | ||
209 | return error; | |
210 | ||
211 | } | |
212 | ||
213 | void unregister_one_node(int nid) | |
214 | { | |
215 | unregister_node(&node_devices[nid]); | |
216 | } | |
217 | ||
4b45099b | 218 | static int __init register_node_type(void) |
1da177e4 LT |
219 | { |
220 | return sysdev_class_register(&node_class); | |
221 | } | |
222 | postcore_initcall(register_node_type); |