]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/base/node.c
2 * drivers/base/node.c - basic Node class support
5 #include <linux/sysdev.h>
6 #include <linux/module.h>
7 #include <linux/init.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 #include <linux/cpu.h>
16 static struct sysdev_class node_class
= {
17 set_kset_name("node"),
21 static ssize_t
node_read_cpumap(struct sys_device
* dev
, char * buf
)
23 struct node
*node_dev
= to_node(dev
);
24 cpumask_t mask
= node_to_cpumask(node_dev
->sysdev
.id
);
27 /* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */
28 BUILD_BUG_ON(MAX_NUMNODES
/4 > PAGE_SIZE
/2);
30 len
= cpumask_scnprintf(buf
, PAGE_SIZE
-1, mask
);
31 len
+= sprintf(buf
+ len
, "\n");
35 static SYSDEV_ATTR(cpumap
, S_IRUGO
, node_read_cpumap
, NULL
);
37 #define K(x) ((x) << (PAGE_SHIFT - 10))
38 static ssize_t
node_read_meminfo(struct sys_device
* dev
, char * buf
)
44 unsigned long inactive
;
48 si_meminfo_node(&i
, nid
);
49 get_page_state_node(&ps
, nid
);
50 __get_zone_counts(&active
, &inactive
, &free
, NODE_DATA(nid
));
52 /* Check for negative values in these approximate counters */
53 if ((long)ps
.nr_dirty
< 0)
55 if ((long)ps
.nr_writeback
< 0)
57 if ((long)ps
.nr_slab
< 0)
61 "Node %d MemTotal: %8lu kB\n"
62 "Node %d MemFree: %8lu kB\n"
63 "Node %d MemUsed: %8lu kB\n"
64 "Node %d Active: %8lu kB\n"
65 "Node %d Inactive: %8lu kB\n"
66 "Node %d HighTotal: %8lu kB\n"
67 "Node %d HighFree: %8lu kB\n"
68 "Node %d LowTotal: %8lu kB\n"
69 "Node %d LowFree: %8lu kB\n"
70 "Node %d Dirty: %8lu kB\n"
71 "Node %d Writeback: %8lu kB\n"
72 "Node %d FilePages: %8lu kB\n"
73 "Node %d Mapped: %8lu kB\n"
74 "Node %d AnonPages: %8lu kB\n"
75 "Node %d Slab: %8lu kB\n",
78 nid
, K(i
.totalram
- i
.freeram
),
83 nid
, K(i
.totalram
- i
.totalhigh
),
84 nid
, K(i
.freeram
- i
.freehigh
),
86 nid
, K(ps
.nr_writeback
),
87 nid
, K(node_page_state(nid
, NR_FILE_PAGES
)),
88 nid
, K(node_page_state(nid
, NR_FILE_MAPPED
)),
89 nid
, K(node_page_state(nid
, NR_ANON_PAGES
)),
91 n
+= hugetlb_report_node_meminfo(nid
, buf
+ n
);
96 static SYSDEV_ATTR(meminfo
, S_IRUGO
, node_read_meminfo
, NULL
);
98 static ssize_t
node_read_numastat(struct sys_device
* dev
, char * buf
)
100 unsigned long numa_hit
, numa_miss
, interleave_hit
, numa_foreign
;
101 unsigned long local_node
, other_node
;
103 pg_data_t
*pg
= NODE_DATA(dev
->id
);
110 for (i
= 0; i
< MAX_NR_ZONES
; i
++) {
111 struct zone
*z
= &pg
->node_zones
[i
];
112 for_each_online_cpu(cpu
) {
113 struct per_cpu_pageset
*ps
= zone_pcp(z
,cpu
);
114 numa_hit
+= ps
->numa_hit
;
115 numa_miss
+= ps
->numa_miss
;
116 numa_foreign
+= ps
->numa_foreign
;
117 interleave_hit
+= ps
->interleave_hit
;
118 local_node
+= ps
->local_node
;
119 other_node
+= ps
->other_node
;
126 "interleave_hit %lu\n"
136 static SYSDEV_ATTR(numastat
, S_IRUGO
, node_read_numastat
, NULL
);
138 static ssize_t
node_read_distance(struct sys_device
* dev
, char * buf
)
144 /* buf currently PAGE_SIZE, need ~4 chars per node */
145 BUILD_BUG_ON(MAX_NUMNODES
*4 > PAGE_SIZE
/2);
147 for_each_online_node(i
)
148 len
+= sprintf(buf
+ len
, "%s%d", i
? " " : "", node_distance(nid
, i
));
150 len
+= sprintf(buf
+ len
, "\n");
153 static SYSDEV_ATTR(distance
, S_IRUGO
, node_read_distance
, NULL
);
157 * register_node - Setup a driverfs device for a node.
158 * @num - Node number to use when creating the device.
160 * Initialize and register the node device.
162 int register_node(struct node
*node
, int num
, struct node
*parent
)
166 node
->sysdev
.id
= num
;
167 node
->sysdev
.cls
= &node_class
;
168 error
= sysdev_register(&node
->sysdev
);
171 sysdev_create_file(&node
->sysdev
, &attr_cpumap
);
172 sysdev_create_file(&node
->sysdev
, &attr_meminfo
);
173 sysdev_create_file(&node
->sysdev
, &attr_numastat
);
174 sysdev_create_file(&node
->sysdev
, &attr_distance
);
180 * unregister_node - unregister a node device
181 * @node: node going away
183 * Unregisters a node device @node. All the devices on the node must be
184 * unregistered before calling this function.
186 void unregister_node(struct node
*node
)
188 sysdev_remove_file(&node
->sysdev
, &attr_cpumap
);
189 sysdev_remove_file(&node
->sysdev
, &attr_meminfo
);
190 sysdev_remove_file(&node
->sysdev
, &attr_numastat
);
191 sysdev_remove_file(&node
->sysdev
, &attr_distance
);
193 sysdev_unregister(&node
->sysdev
);
196 struct node node_devices
[MAX_NUMNODES
];
199 * register cpu under node
201 int register_cpu_under_node(unsigned int cpu
, unsigned int nid
)
203 if (node_online(nid
)) {
204 struct sys_device
*obj
= get_cpu_sysdev(cpu
);
207 return sysfs_create_link(&node_devices
[nid
].sysdev
.kobj
,
209 kobject_name(&obj
->kobj
));
215 int unregister_cpu_under_node(unsigned int cpu
, unsigned int nid
)
217 if (node_online(nid
)) {
218 struct sys_device
*obj
= get_cpu_sysdev(cpu
);
220 sysfs_remove_link(&node_devices
[nid
].sysdev
.kobj
,
221 kobject_name(&obj
->kobj
));
226 int register_one_node(int nid
)
231 if (node_online(nid
)) {
232 int p_node
= parent_node(nid
);
233 struct node
*parent
= NULL
;
236 parent
= &node_devices
[p_node
];
238 error
= register_node(&node_devices
[nid
], nid
, parent
);
240 /* link cpu under this node */
241 for_each_present_cpu(cpu
) {
242 if (cpu_to_node(cpu
) == nid
)
243 register_cpu_under_node(cpu
, nid
);
251 void unregister_one_node(int nid
)
253 unregister_node(&node_devices
[nid
]);
256 static int __init
register_node_type(void)
258 return sysdev_class_register(&node_class
);
260 postcore_initcall(register_node_type
);