Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
10fbcf4c | 3 | * Basic Node interface support |
1da177e4 LT |
4 | */ |
5 | ||
1da177e4 LT |
6 | #include <linux/module.h> |
7 | #include <linux/init.h> | |
8 | #include <linux/mm.h> | |
c04fc586 | 9 | #include <linux/memory.h> |
fa25c503 | 10 | #include <linux/vmstat.h> |
6e259e7d | 11 | #include <linux/notifier.h> |
1da177e4 LT |
12 | #include <linux/node.h> |
13 | #include <linux/hugetlb.h> | |
ed4a6d7f | 14 | #include <linux/compaction.h> |
1da177e4 LT |
15 | #include <linux/cpumask.h> |
16 | #include <linux/topology.h> | |
17 | #include <linux/nodemask.h> | |
76b67ed9 | 18 | #include <linux/cpu.h> |
bde631a5 | 19 | #include <linux/device.h> |
08d9dbe7 | 20 | #include <linux/pm_runtime.h> |
af936a16 | 21 | #include <linux/swap.h> |
18e5b539 | 22 | #include <linux/slab.h> |
1da177e4 | 23 | |
10fbcf4c | 24 | static struct bus_type node_subsys = { |
af5ca3f4 | 25 | .name = "node", |
10fbcf4c | 26 | .dev_name = "node", |
1da177e4 LT |
27 | }; |
28 | ||
29 | ||
5aaba363 | 30 | static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf) |
1da177e4 | 31 | { |
064f0e93 ZL |
32 | ssize_t n; |
33 | cpumask_var_t mask; | |
1da177e4 | 34 | struct node *node_dev = to_node(dev); |
1da177e4 | 35 | |
39106dcf MT |
36 | /* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */ |
37 | BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1)); | |
1da177e4 | 38 | |
064f0e93 ZL |
39 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) |
40 | return 0; | |
41 | ||
42 | cpumask_and(mask, cpumask_of_node(node_dev->dev.id), cpu_online_mask); | |
43 | n = cpumap_print_to_pagebuf(list, buf, mask); | |
44 | free_cpumask_var(mask); | |
45 | ||
46 | return n; | |
1da177e4 LT |
47 | } |
48 | ||
948b3edb JP |
49 | static inline ssize_t cpumap_show(struct device *dev, |
50 | struct device_attribute *attr, | |
51 | char *buf) | |
39106dcf | 52 | { |
5aaba363 | 53 | return node_read_cpumap(dev, false, buf); |
39106dcf | 54 | } |
948b3edb JP |
55 | |
56 | static DEVICE_ATTR_RO(cpumap); | |
57 | ||
58 | static inline ssize_t cpulist_show(struct device *dev, | |
59 | struct device_attribute *attr, | |
60 | char *buf) | |
39106dcf | 61 | { |
5aaba363 | 62 | return node_read_cpumap(dev, true, buf); |
39106dcf MT |
63 | } |
64 | ||
948b3edb | 65 | static DEVICE_ATTR_RO(cpulist); |
1da177e4 | 66 | |
08d9dbe7 KB |
67 | /** |
68 | * struct node_access_nodes - Access class device to hold user visible | |
69 | * relationships to other nodes. | |
70 | * @dev: Device for this memory access class | |
71 | * @list_node: List element in the node's access list | |
72 | * @access: The access class rank | |
58cb346c | 73 | * @hmem_attrs: Heterogeneous memory performance attributes |
08d9dbe7 KB |
74 | */ |
75 | struct node_access_nodes { | |
76 | struct device dev; | |
77 | struct list_head list_node; | |
78 | unsigned access; | |
e1cf33aa KB |
79 | #ifdef CONFIG_HMEM_REPORTING |
80 | struct node_hmem_attrs hmem_attrs; | |
81 | #endif | |
08d9dbe7 KB |
82 | }; |
83 | #define to_access_nodes(dev) container_of(dev, struct node_access_nodes, dev) | |
84 | ||
85 | static struct attribute *node_init_access_node_attrs[] = { | |
86 | NULL, | |
87 | }; | |
88 | ||
89 | static struct attribute *node_targ_access_node_attrs[] = { | |
90 | NULL, | |
91 | }; | |
92 | ||
93 | static const struct attribute_group initiators = { | |
94 | .name = "initiators", | |
95 | .attrs = node_init_access_node_attrs, | |
96 | }; | |
97 | ||
98 | static const struct attribute_group targets = { | |
99 | .name = "targets", | |
100 | .attrs = node_targ_access_node_attrs, | |
101 | }; | |
102 | ||
103 | static const struct attribute_group *node_access_node_groups[] = { | |
104 | &initiators, | |
105 | &targets, | |
106 | NULL, | |
107 | }; | |
108 | ||
109 | static void node_remove_accesses(struct node *node) | |
110 | { | |
111 | struct node_access_nodes *c, *cnext; | |
112 | ||
113 | list_for_each_entry_safe(c, cnext, &node->access_list, list_node) { | |
114 | list_del(&c->list_node); | |
115 | device_unregister(&c->dev); | |
116 | } | |
117 | } | |
118 | ||
119 | static void node_access_release(struct device *dev) | |
120 | { | |
121 | kfree(to_access_nodes(dev)); | |
122 | } | |
123 | ||
124 | static struct node_access_nodes *node_init_node_access(struct node *node, | |
125 | unsigned access) | |
126 | { | |
127 | struct node_access_nodes *access_node; | |
128 | struct device *dev; | |
129 | ||
130 | list_for_each_entry(access_node, &node->access_list, list_node) | |
131 | if (access_node->access == access) | |
132 | return access_node; | |
133 | ||
134 | access_node = kzalloc(sizeof(*access_node), GFP_KERNEL); | |
135 | if (!access_node) | |
136 | return NULL; | |
137 | ||
138 | access_node->access = access; | |
139 | dev = &access_node->dev; | |
140 | dev->parent = &node->dev; | |
141 | dev->release = node_access_release; | |
142 | dev->groups = node_access_node_groups; | |
143 | if (dev_set_name(dev, "access%u", access)) | |
144 | goto free; | |
145 | ||
146 | if (device_register(dev)) | |
147 | goto free_name; | |
148 | ||
149 | pm_runtime_no_callbacks(dev); | |
150 | list_add_tail(&access_node->list_node, &node->access_list); | |
151 | return access_node; | |
152 | free_name: | |
153 | kfree_const(dev->kobj.name); | |
154 | free: | |
155 | kfree(access_node); | |
156 | return NULL; | |
157 | } | |
158 | ||
e1cf33aa | 159 | #ifdef CONFIG_HMEM_REPORTING |
948b3edb JP |
160 | #define ACCESS_ATTR(name) \ |
161 | static ssize_t name##_show(struct device *dev, \ | |
162 | struct device_attribute *attr, \ | |
163 | char *buf) \ | |
164 | { \ | |
165 | return sysfs_emit(buf, "%u\n", \ | |
166 | to_access_nodes(dev)->hmem_attrs.name); \ | |
167 | } \ | |
e1cf33aa KB |
168 | static DEVICE_ATTR_RO(name); |
169 | ||
170 | ACCESS_ATTR(read_bandwidth) | |
171 | ACCESS_ATTR(read_latency) | |
172 | ACCESS_ATTR(write_bandwidth) | |
173 | ACCESS_ATTR(write_latency) | |
174 | ||
175 | static struct attribute *access_attrs[] = { | |
176 | &dev_attr_read_bandwidth.attr, | |
177 | &dev_attr_read_latency.attr, | |
178 | &dev_attr_write_bandwidth.attr, | |
179 | &dev_attr_write_latency.attr, | |
180 | NULL, | |
181 | }; | |
182 | ||
183 | /** | |
184 | * node_set_perf_attrs - Set the performance values for given access class | |
185 | * @nid: Node identifier to be set | |
186 | * @hmem_attrs: Heterogeneous memory performance attributes | |
187 | * @access: The access class the for the given attributes | |
188 | */ | |
189 | void node_set_perf_attrs(unsigned int nid, struct node_hmem_attrs *hmem_attrs, | |
190 | unsigned access) | |
191 | { | |
192 | struct node_access_nodes *c; | |
193 | struct node *node; | |
194 | int i; | |
195 | ||
196 | if (WARN_ON_ONCE(!node_online(nid))) | |
197 | return; | |
198 | ||
199 | node = node_devices[nid]; | |
200 | c = node_init_node_access(node, access); | |
201 | if (!c) | |
202 | return; | |
203 | ||
204 | c->hmem_attrs = *hmem_attrs; | |
205 | for (i = 0; access_attrs[i] != NULL; i++) { | |
206 | if (sysfs_add_file_to_group(&c->dev.kobj, access_attrs[i], | |
207 | "initiators")) { | |
208 | pr_info("failed to add performance attribute to node %d\n", | |
209 | nid); | |
210 | break; | |
211 | } | |
212 | } | |
213 | } | |
acc02a10 KB |
214 | |
215 | /** | |
216 | * struct node_cache_info - Internal tracking for memory node caches | |
217 | * @dev: Device represeting the cache level | |
218 | * @node: List element for tracking in the node | |
219 | * @cache_attrs:Attributes for this cache level | |
220 | */ | |
221 | struct node_cache_info { | |
222 | struct device dev; | |
223 | struct list_head node; | |
224 | struct node_cache_attrs cache_attrs; | |
225 | }; | |
226 | #define to_cache_info(device) container_of(device, struct node_cache_info, dev) | |
227 | ||
228 | #define CACHE_ATTR(name, fmt) \ | |
229 | static ssize_t name##_show(struct device *dev, \ | |
230 | struct device_attribute *attr, \ | |
231 | char *buf) \ | |
232 | { \ | |
948b3edb JP |
233 | return sysfs_emit(buf, fmt "\n", \ |
234 | to_cache_info(dev)->cache_attrs.name); \ | |
acc02a10 KB |
235 | } \ |
236 | DEVICE_ATTR_RO(name); | |
237 | ||
238 | CACHE_ATTR(size, "%llu") | |
239 | CACHE_ATTR(line_size, "%u") | |
240 | CACHE_ATTR(indexing, "%u") | |
241 | CACHE_ATTR(write_policy, "%u") | |
242 | ||
243 | static struct attribute *cache_attrs[] = { | |
244 | &dev_attr_indexing.attr, | |
245 | &dev_attr_size.attr, | |
246 | &dev_attr_line_size.attr, | |
247 | &dev_attr_write_policy.attr, | |
248 | NULL, | |
249 | }; | |
250 | ATTRIBUTE_GROUPS(cache); | |
251 | ||
252 | static void node_cache_release(struct device *dev) | |
253 | { | |
254 | kfree(dev); | |
255 | } | |
256 | ||
257 | static void node_cacheinfo_release(struct device *dev) | |
258 | { | |
259 | struct node_cache_info *info = to_cache_info(dev); | |
260 | kfree(info); | |
261 | } | |
262 | ||
263 | static void node_init_cache_dev(struct node *node) | |
264 | { | |
265 | struct device *dev; | |
266 | ||
267 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
268 | if (!dev) | |
269 | return; | |
270 | ||
271 | dev->parent = &node->dev; | |
272 | dev->release = node_cache_release; | |
273 | if (dev_set_name(dev, "memory_side_cache")) | |
274 | goto free_dev; | |
275 | ||
276 | if (device_register(dev)) | |
277 | goto free_name; | |
278 | ||
279 | pm_runtime_no_callbacks(dev); | |
280 | node->cache_dev = dev; | |
281 | return; | |
282 | free_name: | |
283 | kfree_const(dev->kobj.name); | |
284 | free_dev: | |
285 | kfree(dev); | |
286 | } | |
287 | ||
288 | /** | |
289 | * node_add_cache() - add cache attribute to a memory node | |
290 | * @nid: Node identifier that has new cache attributes | |
291 | * @cache_attrs: Attributes for the cache being added | |
292 | */ | |
293 | void node_add_cache(unsigned int nid, struct node_cache_attrs *cache_attrs) | |
294 | { | |
295 | struct node_cache_info *info; | |
296 | struct device *dev; | |
297 | struct node *node; | |
298 | ||
299 | if (!node_online(nid) || !node_devices[nid]) | |
300 | return; | |
301 | ||
302 | node = node_devices[nid]; | |
303 | list_for_each_entry(info, &node->cache_attrs, node) { | |
304 | if (info->cache_attrs.level == cache_attrs->level) { | |
305 | dev_warn(&node->dev, | |
306 | "attempt to add duplicate cache level:%d\n", | |
307 | cache_attrs->level); | |
308 | return; | |
309 | } | |
310 | } | |
311 | ||
312 | if (!node->cache_dev) | |
313 | node_init_cache_dev(node); | |
314 | if (!node->cache_dev) | |
315 | return; | |
316 | ||
317 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
318 | if (!info) | |
319 | return; | |
320 | ||
321 | dev = &info->dev; | |
322 | dev->parent = node->cache_dev; | |
323 | dev->release = node_cacheinfo_release; | |
324 | dev->groups = cache_groups; | |
325 | if (dev_set_name(dev, "index%d", cache_attrs->level)) | |
326 | goto free_cache; | |
327 | ||
328 | info->cache_attrs = *cache_attrs; | |
329 | if (device_register(dev)) { | |
330 | dev_warn(&node->dev, "failed to add cache level:%d\n", | |
331 | cache_attrs->level); | |
332 | goto free_name; | |
333 | } | |
334 | pm_runtime_no_callbacks(dev); | |
335 | list_add_tail(&info->node, &node->cache_attrs); | |
336 | return; | |
337 | free_name: | |
338 | kfree_const(dev->kobj.name); | |
339 | free_cache: | |
340 | kfree(info); | |
341 | } | |
342 | ||
343 | static void node_remove_caches(struct node *node) | |
344 | { | |
345 | struct node_cache_info *info, *next; | |
346 | ||
347 | if (!node->cache_dev) | |
348 | return; | |
349 | ||
350 | list_for_each_entry_safe(info, next, &node->cache_attrs, node) { | |
351 | list_del(&info->node); | |
352 | device_unregister(&info->dev); | |
353 | } | |
354 | device_unregister(node->cache_dev); | |
355 | } | |
356 | ||
357 | static void node_init_caches(unsigned int nid) | |
358 | { | |
359 | INIT_LIST_HEAD(&node_devices[nid]->cache_attrs); | |
360 | } | |
361 | #else | |
362 | static void node_init_caches(unsigned int nid) { } | |
363 | static void node_remove_caches(struct node *node) { } | |
e1cf33aa KB |
364 | #endif |
365 | ||
1da177e4 | 366 | #define K(x) ((x) << (PAGE_SHIFT - 10)) |
10fbcf4c KS |
367 | static ssize_t node_read_meminfo(struct device *dev, |
368 | struct device_attribute *attr, char *buf) | |
1da177e4 | 369 | { |
948b3edb | 370 | int len = 0; |
1da177e4 | 371 | int nid = dev->id; |
599d0c95 | 372 | struct pglist_data *pgdat = NODE_DATA(nid); |
1da177e4 | 373 | struct sysinfo i; |
61f94e18 | 374 | unsigned long sreclaimable, sunreclaimable; |
1da177e4 LT |
375 | |
376 | si_meminfo_node(&i, nid); | |
d42f3245 RG |
377 | sreclaimable = node_page_state_pages(pgdat, NR_SLAB_RECLAIMABLE_B); |
378 | sunreclaimable = node_page_state_pages(pgdat, NR_SLAB_UNRECLAIMABLE_B); | |
948b3edb JP |
379 | len = sysfs_emit_at(buf, len, |
380 | "Node %d MemTotal: %8lu kB\n" | |
381 | "Node %d MemFree: %8lu kB\n" | |
382 | "Node %d MemUsed: %8lu kB\n" | |
383 | "Node %d Active: %8lu kB\n" | |
384 | "Node %d Inactive: %8lu kB\n" | |
385 | "Node %d Active(anon): %8lu kB\n" | |
386 | "Node %d Inactive(anon): %8lu kB\n" | |
387 | "Node %d Active(file): %8lu kB\n" | |
388 | "Node %d Inactive(file): %8lu kB\n" | |
389 | "Node %d Unevictable: %8lu kB\n" | |
390 | "Node %d Mlocked: %8lu kB\n", | |
391 | nid, K(i.totalram), | |
392 | nid, K(i.freeram), | |
393 | nid, K(i.totalram - i.freeram), | |
394 | nid, K(node_page_state(pgdat, NR_ACTIVE_ANON) + | |
395 | node_page_state(pgdat, NR_ACTIVE_FILE)), | |
396 | nid, K(node_page_state(pgdat, NR_INACTIVE_ANON) + | |
397 | node_page_state(pgdat, NR_INACTIVE_FILE)), | |
398 | nid, K(node_page_state(pgdat, NR_ACTIVE_ANON)), | |
399 | nid, K(node_page_state(pgdat, NR_INACTIVE_ANON)), | |
400 | nid, K(node_page_state(pgdat, NR_ACTIVE_FILE)), | |
401 | nid, K(node_page_state(pgdat, NR_INACTIVE_FILE)), | |
402 | nid, K(node_page_state(pgdat, NR_UNEVICTABLE)), | |
403 | nid, K(sum_zone_node_page_state(nid, NR_MLOCK))); | |
7ee92255 | 404 | |
182e8e23 | 405 | #ifdef CONFIG_HIGHMEM |
948b3edb JP |
406 | len += sysfs_emit_at(buf, len, |
407 | "Node %d HighTotal: %8lu kB\n" | |
408 | "Node %d HighFree: %8lu kB\n" | |
409 | "Node %d LowTotal: %8lu kB\n" | |
410 | "Node %d LowFree: %8lu kB\n", | |
411 | nid, K(i.totalhigh), | |
412 | nid, K(i.freehigh), | |
413 | nid, K(i.totalram - i.totalhigh), | |
414 | nid, K(i.freeram - i.freehigh)); | |
182e8e23 | 415 | #endif |
948b3edb JP |
416 | len += sysfs_emit_at(buf, len, |
417 | "Node %d Dirty: %8lu kB\n" | |
418 | "Node %d Writeback: %8lu kB\n" | |
419 | "Node %d FilePages: %8lu kB\n" | |
420 | "Node %d Mapped: %8lu kB\n" | |
421 | "Node %d AnonPages: %8lu kB\n" | |
422 | "Node %d Shmem: %8lu kB\n" | |
423 | "Node %d KernelStack: %8lu kB\n" | |
628d06a4 | 424 | #ifdef CONFIG_SHADOW_CALL_STACK |
948b3edb | 425 | "Node %d ShadowCallStack:%8lu kB\n" |
628d06a4 | 426 | #endif |
948b3edb JP |
427 | "Node %d PageTables: %8lu kB\n" |
428 | "Node %d NFS_Unstable: %8lu kB\n" | |
429 | "Node %d Bounce: %8lu kB\n" | |
430 | "Node %d WritebackTmp: %8lu kB\n" | |
431 | "Node %d KReclaimable: %8lu kB\n" | |
432 | "Node %d Slab: %8lu kB\n" | |
433 | "Node %d SReclaimable: %8lu kB\n" | |
434 | "Node %d SUnreclaim: %8lu kB\n" | |
05b258e9 | 435 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
948b3edb JP |
436 | "Node %d AnonHugePages: %8lu kB\n" |
437 | "Node %d ShmemHugePages: %8lu kB\n" | |
438 | "Node %d ShmemPmdMapped: %8lu kB\n" | |
439 | "Node %d FileHugePages: %8lu kB\n" | |
440 | "Node %d FilePmdMapped: %8lu kB\n" | |
05b258e9 | 441 | #endif |
948b3edb JP |
442 | , |
443 | nid, K(node_page_state(pgdat, NR_FILE_DIRTY)), | |
444 | nid, K(node_page_state(pgdat, NR_WRITEBACK)), | |
445 | nid, K(node_page_state(pgdat, NR_FILE_PAGES)), | |
446 | nid, K(node_page_state(pgdat, NR_FILE_MAPPED)), | |
447 | nid, K(node_page_state(pgdat, NR_ANON_MAPPED)), | |
448 | nid, K(i.sharedram), | |
449 | nid, node_page_state(pgdat, NR_KERNEL_STACK_KB), | |
628d06a4 | 450 | #ifdef CONFIG_SHADOW_CALL_STACK |
948b3edb | 451 | nid, node_page_state(pgdat, NR_KERNEL_SCS_KB), |
628d06a4 | 452 | #endif |
948b3edb JP |
453 | nid, K(sum_zone_node_page_state(nid, NR_PAGETABLE)), |
454 | nid, 0UL, | |
455 | nid, K(sum_zone_node_page_state(nid, NR_BOUNCE)), | |
456 | nid, K(node_page_state(pgdat, NR_WRITEBACK_TEMP)), | |
457 | nid, K(sreclaimable + | |
458 | node_page_state(pgdat, NR_KERNEL_MISC_RECLAIMABLE)), | |
459 | nid, K(sreclaimable + sunreclaimable), | |
460 | nid, K(sreclaimable), | |
461 | nid, K(sunreclaimable) | |
05b258e9 | 462 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
948b3edb JP |
463 | , |
464 | nid, K(node_page_state(pgdat, NR_ANON_THPS) * | |
465 | HPAGE_PMD_NR), | |
466 | nid, K(node_page_state(pgdat, NR_SHMEM_THPS) * | |
467 | HPAGE_PMD_NR), | |
468 | nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) * | |
469 | HPAGE_PMD_NR), | |
470 | nid, K(node_page_state(pgdat, NR_FILE_THPS) * | |
471 | HPAGE_PMD_NR), | |
472 | nid, K(node_page_state(pgdat, NR_FILE_PMDMAPPED) * | |
473 | HPAGE_PMD_NR) | |
05b258e9 | 474 | #endif |
948b3edb | 475 | ); |
7981593b | 476 | len += hugetlb_report_node_meminfo(buf, len, nid); |
948b3edb | 477 | return len; |
1da177e4 LT |
478 | } |
479 | ||
480 | #undef K | |
948b3edb | 481 | static DEVICE_ATTR(meminfo, 0444, node_read_meminfo, NULL); |
1da177e4 | 482 | |
10fbcf4c | 483 | static ssize_t node_read_numastat(struct device *dev, |
948b3edb | 484 | struct device_attribute *attr, char *buf) |
1da177e4 | 485 | { |
aa838896 JP |
486 | return sysfs_emit(buf, |
487 | "numa_hit %lu\n" | |
488 | "numa_miss %lu\n" | |
489 | "numa_foreign %lu\n" | |
490 | "interleave_hit %lu\n" | |
491 | "local_node %lu\n" | |
492 | "other_node %lu\n", | |
493 | sum_zone_numa_state(dev->id, NUMA_HIT), | |
494 | sum_zone_numa_state(dev->id, NUMA_MISS), | |
495 | sum_zone_numa_state(dev->id, NUMA_FOREIGN), | |
496 | sum_zone_numa_state(dev->id, NUMA_INTERLEAVE_HIT), | |
497 | sum_zone_numa_state(dev->id, NUMA_LOCAL), | |
498 | sum_zone_numa_state(dev->id, NUMA_OTHER)); | |
1da177e4 | 499 | } |
948b3edb | 500 | static DEVICE_ATTR(numastat, 0444, node_read_numastat, NULL); |
1da177e4 | 501 | |
10fbcf4c KS |
502 | static ssize_t node_read_vmstat(struct device *dev, |
503 | struct device_attribute *attr, char *buf) | |
2ac39037 MR |
504 | { |
505 | int nid = dev->id; | |
75ef7184 | 506 | struct pglist_data *pgdat = NODE_DATA(nid); |
fa25c503 | 507 | int i; |
948b3edb | 508 | int len = 0; |
fa25c503 KM |
509 | |
510 | for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) | |
948b3edb JP |
511 | len += sysfs_emit_at(buf, len, "%s %lu\n", |
512 | zone_stat_name(i), | |
513 | sum_zone_node_page_state(nid, i)); | |
75ef7184 | 514 | |
3a321d2a KW |
515 | #ifdef CONFIG_NUMA |
516 | for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) | |
948b3edb JP |
517 | len += sysfs_emit_at(buf, len, "%s %lu\n", |
518 | numa_stat_name(i), | |
519 | sum_zone_numa_state(nid, i)); | |
3a321d2a | 520 | |
948b3edb | 521 | #endif |
3a321d2a | 522 | for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) |
948b3edb JP |
523 | len += sysfs_emit_at(buf, len, "%s %lu\n", |
524 | node_stat_name(i), | |
525 | node_page_state_pages(pgdat, i)); | |
fa25c503 | 526 | |
948b3edb | 527 | return len; |
2ac39037 | 528 | } |
948b3edb | 529 | static DEVICE_ATTR(vmstat, 0444, node_read_vmstat, NULL); |
2ac39037 | 530 | |
10fbcf4c | 531 | static ssize_t node_read_distance(struct device *dev, |
948b3edb | 532 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
533 | { |
534 | int nid = dev->id; | |
535 | int len = 0; | |
536 | int i; | |
537 | ||
12ee3c0a DR |
538 | /* |
539 | * buf is currently PAGE_SIZE in length and each node needs 4 chars | |
540 | * at the most (distance + space or newline). | |
541 | */ | |
542 | BUILD_BUG_ON(MAX_NUMNODES * 4 > PAGE_SIZE); | |
1da177e4 | 543 | |
948b3edb JP |
544 | for_each_online_node(i) { |
545 | len += sysfs_emit_at(buf, len, "%s%d", | |
546 | i ? " " : "", node_distance(nid, i)); | |
547 | } | |
1da177e4 | 548 | |
948b3edb | 549 | len += sysfs_emit_at(buf, len, "\n"); |
1da177e4 LT |
550 | return len; |
551 | } | |
948b3edb | 552 | static DEVICE_ATTR(distance, 0444, node_read_distance, NULL); |
1da177e4 | 553 | |
3c9b8aaf TI |
554 | static struct attribute *node_dev_attrs[] = { |
555 | &dev_attr_cpumap.attr, | |
556 | &dev_attr_cpulist.attr, | |
557 | &dev_attr_meminfo.attr, | |
558 | &dev_attr_numastat.attr, | |
559 | &dev_attr_distance.attr, | |
560 | &dev_attr_vmstat.attr, | |
561 | NULL | |
562 | }; | |
7ca7ec40 | 563 | ATTRIBUTE_GROUPS(node_dev); |
3c9b8aaf | 564 | |
9a305230 LS |
565 | #ifdef CONFIG_HUGETLBFS |
566 | /* | |
567 | * hugetlbfs per node attributes registration interface: | |
568 | * When/if hugetlb[fs] subsystem initializes [sometime after this module], | |
4faf8d95 LS |
569 | * it will register its per node attributes for all online nodes with |
570 | * memory. It will also call register_hugetlbfs_with_node(), below, to | |
9a305230 LS |
571 | * register its attribute registration functions with this node driver. |
572 | * Once these hooks have been initialized, the node driver will call into | |
573 | * the hugetlb module to [un]register attributes for hot-plugged nodes. | |
574 | */ | |
575 | static node_registration_func_t __hugetlb_register_node; | |
576 | static node_registration_func_t __hugetlb_unregister_node; | |
577 | ||
39da08cb | 578 | static inline bool hugetlb_register_node(struct node *node) |
9a305230 | 579 | { |
4faf8d95 | 580 | if (__hugetlb_register_node && |
8cebfcd0 | 581 | node_state(node->dev.id, N_MEMORY)) { |
9a305230 | 582 | __hugetlb_register_node(node); |
39da08cb LS |
583 | return true; |
584 | } | |
585 | return false; | |
9a305230 LS |
586 | } |
587 | ||
588 | static inline void hugetlb_unregister_node(struct node *node) | |
589 | { | |
590 | if (__hugetlb_unregister_node) | |
591 | __hugetlb_unregister_node(node); | |
592 | } | |
593 | ||
594 | void register_hugetlbfs_with_node(node_registration_func_t doregister, | |
595 | node_registration_func_t unregister) | |
596 | { | |
597 | __hugetlb_register_node = doregister; | |
598 | __hugetlb_unregister_node = unregister; | |
599 | } | |
600 | #else | |
601 | static inline void hugetlb_register_node(struct node *node) {} | |
602 | ||
603 | static inline void hugetlb_unregister_node(struct node *node) {} | |
604 | #endif | |
605 | ||
8c7b5b4e YI |
606 | static void node_device_release(struct device *dev) |
607 | { | |
608 | struct node *node = to_node(dev); | |
609 | ||
610 | #if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS) | |
611 | /* | |
612 | * We schedule the work only when a memory section is | |
613 | * onlined/offlined on this node. When we come here, | |
614 | * all the memory on this node has been offlined, | |
615 | * so we won't enqueue new work to this work. | |
616 | * | |
617 | * The work is using node->node_work, so we should | |
618 | * flush work before freeing the memory. | |
619 | */ | |
620 | flush_work(&node->node_work); | |
621 | #endif | |
622 | kfree(node); | |
623 | } | |
1da177e4 LT |
624 | |
625 | /* | |
405ae7d3 | 626 | * register_node - Setup a sysfs device for a node. |
1da177e4 LT |
627 | * @num - Node number to use when creating the device. |
628 | * | |
629 | * Initialize and register the node device. | |
630 | */ | |
a7be6e5a | 631 | static int register_node(struct node *node, int num) |
1da177e4 LT |
632 | { |
633 | int error; | |
634 | ||
10fbcf4c KS |
635 | node->dev.id = num; |
636 | node->dev.bus = &node_subsys; | |
8c7b5b4e | 637 | node->dev.release = node_device_release; |
7ca7ec40 | 638 | node->dev.groups = node_dev_groups; |
10fbcf4c | 639 | error = device_register(&node->dev); |
1da177e4 | 640 | |
c1cc0d51 AY |
641 | if (error) |
642 | put_device(&node->dev); | |
643 | else { | |
9a305230 | 644 | hugetlb_register_node(node); |
ed4a6d7f MG |
645 | |
646 | compaction_register_node(node); | |
1da177e4 LT |
647 | } |
648 | return error; | |
649 | } | |
650 | ||
4b45099b KT |
651 | /** |
652 | * unregister_node - unregister a node device | |
653 | * @node: node going away | |
654 | * | |
655 | * Unregisters a node device @node. All the devices on the node must be | |
656 | * unregistered before calling this function. | |
657 | */ | |
658 | void unregister_node(struct node *node) | |
659 | { | |
4faf8d95 | 660 | hugetlb_unregister_node(node); /* no-op, if memoryless node */ |
08d9dbe7 | 661 | node_remove_accesses(node); |
acc02a10 | 662 | node_remove_caches(node); |
10fbcf4c | 663 | device_unregister(&node->dev); |
4b45099b | 664 | } |
1da177e4 | 665 | |
8732794b | 666 | struct node *node_devices[MAX_NUMNODES]; |
0fc44159 | 667 | |
76b67ed9 KH |
668 | /* |
669 | * register cpu under node | |
670 | */ | |
671 | int register_cpu_under_node(unsigned int cpu, unsigned int nid) | |
672 | { | |
1830794a | 673 | int ret; |
8a25a2fd | 674 | struct device *obj; |
76b67ed9 | 675 | |
f8246f31 AC |
676 | if (!node_online(nid)) |
677 | return 0; | |
678 | ||
8a25a2fd | 679 | obj = get_cpu_device(cpu); |
f8246f31 AC |
680 | if (!obj) |
681 | return 0; | |
682 | ||
8732794b | 683 | ret = sysfs_create_link(&node_devices[nid]->dev.kobj, |
f8246f31 AC |
684 | &obj->kobj, |
685 | kobject_name(&obj->kobj)); | |
1830794a AC |
686 | if (ret) |
687 | return ret; | |
688 | ||
689 | return sysfs_create_link(&obj->kobj, | |
8732794b WC |
690 | &node_devices[nid]->dev.kobj, |
691 | kobject_name(&node_devices[nid]->dev.kobj)); | |
76b67ed9 KH |
692 | } |
693 | ||
08d9dbe7 KB |
694 | /** |
695 | * register_memory_node_under_compute_node - link memory node to its compute | |
696 | * node for a given access class. | |
58cb346c MCC |
697 | * @mem_nid: Memory node number |
698 | * @cpu_nid: Cpu node number | |
08d9dbe7 KB |
699 | * @access: Access class to register |
700 | * | |
701 | * Description: | |
702 | * For use with platforms that may have separate memory and compute nodes. | |
703 | * This function will export node relationships linking which memory | |
704 | * initiator nodes can access memory targets at a given ranked access | |
705 | * class. | |
706 | */ | |
707 | int register_memory_node_under_compute_node(unsigned int mem_nid, | |
708 | unsigned int cpu_nid, | |
709 | unsigned access) | |
710 | { | |
711 | struct node *init_node, *targ_node; | |
712 | struct node_access_nodes *initiator, *target; | |
713 | int ret; | |
714 | ||
715 | if (!node_online(cpu_nid) || !node_online(mem_nid)) | |
716 | return -ENODEV; | |
717 | ||
718 | init_node = node_devices[cpu_nid]; | |
719 | targ_node = node_devices[mem_nid]; | |
720 | initiator = node_init_node_access(init_node, access); | |
721 | target = node_init_node_access(targ_node, access); | |
722 | if (!initiator || !target) | |
723 | return -ENOMEM; | |
724 | ||
725 | ret = sysfs_add_link_to_group(&initiator->dev.kobj, "targets", | |
726 | &targ_node->dev.kobj, | |
727 | dev_name(&targ_node->dev)); | |
728 | if (ret) | |
729 | return ret; | |
730 | ||
731 | ret = sysfs_add_link_to_group(&target->dev.kobj, "initiators", | |
732 | &init_node->dev.kobj, | |
733 | dev_name(&init_node->dev)); | |
734 | if (ret) | |
735 | goto err; | |
736 | ||
737 | return 0; | |
738 | err: | |
739 | sysfs_remove_link_from_group(&initiator->dev.kobj, "targets", | |
740 | dev_name(&targ_node->dev)); | |
741 | return ret; | |
742 | } | |
743 | ||
76b67ed9 KH |
744 | int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) |
745 | { | |
8a25a2fd | 746 | struct device *obj; |
b9d52dad AC |
747 | |
748 | if (!node_online(nid)) | |
749 | return 0; | |
750 | ||
8a25a2fd | 751 | obj = get_cpu_device(cpu); |
b9d52dad AC |
752 | if (!obj) |
753 | return 0; | |
754 | ||
8732794b | 755 | sysfs_remove_link(&node_devices[nid]->dev.kobj, |
b9d52dad | 756 | kobject_name(&obj->kobj)); |
1830794a | 757 | sysfs_remove_link(&obj->kobj, |
8732794b | 758 | kobject_name(&node_devices[nid]->dev.kobj)); |
b9d52dad | 759 | |
76b67ed9 KH |
760 | return 0; |
761 | } | |
762 | ||
c04fc586 | 763 | #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE |
bd721ea7 | 764 | static int __ref get_nid_for_pfn(unsigned long pfn) |
c04fc586 | 765 | { |
c04fc586 GH |
766 | if (!pfn_valid_within(pfn)) |
767 | return -1; | |
3a80a7fa | 768 | #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT |
8cdde385 | 769 | if (system_state < SYSTEM_RUNNING) |
3a80a7fa MG |
770 | return early_pfn_to_nid(pfn); |
771 | #endif | |
c04fc586 GH |
772 | return pfn_to_nid(pfn); |
773 | } | |
774 | ||
775 | /* register memory section under specified node if it spans that node */ | |
8d595c4c DH |
776 | static int register_mem_sect_under_node(struct memory_block *mem_blk, |
777 | void *arg) | |
c04fc586 | 778 | { |
b6c88d3b DH |
779 | unsigned long memory_block_pfns = memory_block_size_bytes() / PAGE_SIZE; |
780 | unsigned long start_pfn = section_nr_to_pfn(mem_blk->start_section_nr); | |
781 | unsigned long end_pfn = start_pfn + memory_block_pfns - 1; | |
4fbce633 | 782 | int ret, nid = *(int *)arg; |
b6c88d3b | 783 | unsigned long pfn; |
c04fc586 | 784 | |
b6c88d3b | 785 | for (pfn = start_pfn; pfn <= end_pfn; pfn++) { |
c04fc586 GH |
786 | int page_nid; |
787 | ||
04697858 YL |
788 | /* |
789 | * memory block could have several absent sections from start. | |
790 | * skip pfn range from absent section | |
791 | */ | |
e03d1f78 | 792 | if (!pfn_in_present_section(pfn)) { |
04697858 YL |
793 | pfn = round_down(pfn + PAGES_PER_SECTION, |
794 | PAGES_PER_SECTION) - 1; | |
795 | continue; | |
796 | } | |
797 | ||
fc44f7f9 PT |
798 | /* |
799 | * We need to check if page belongs to nid only for the boot | |
800 | * case, during hotplug we know that all pages in the memory | |
801 | * block belong to the same node. | |
802 | */ | |
4fbce633 | 803 | if (system_state == SYSTEM_BOOTING) { |
fc44f7f9 PT |
804 | page_nid = get_nid_for_pfn(pfn); |
805 | if (page_nid < 0) | |
806 | continue; | |
807 | if (page_nid != nid) | |
808 | continue; | |
809 | } | |
d84f2f5a DH |
810 | |
811 | /* | |
812 | * If this memory block spans multiple nodes, we only indicate | |
813 | * the last processed node. | |
814 | */ | |
815 | mem_blk->nid = nid; | |
816 | ||
8732794b | 817 | ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj, |
10fbcf4c KS |
818 | &mem_blk->dev.kobj, |
819 | kobject_name(&mem_blk->dev.kobj)); | |
dee5d0d5 AC |
820 | if (ret) |
821 | return ret; | |
822 | ||
10fbcf4c | 823 | return sysfs_create_link_nowarn(&mem_blk->dev.kobj, |
8732794b WC |
824 | &node_devices[nid]->dev.kobj, |
825 | kobject_name(&node_devices[nid]->dev.kobj)); | |
c04fc586 GH |
826 | } |
827 | /* mem section does not span the specified node */ | |
828 | return 0; | |
829 | } | |
830 | ||
4c4b7f9b | 831 | /* |
d84f2f5a DH |
832 | * Unregister a memory block device under the node it spans. Memory blocks |
833 | * with multiple nodes cannot be offlined and therefore also never be removed. | |
4c4b7f9b | 834 | */ |
a31b264c | 835 | void unregister_memory_block_under_nodes(struct memory_block *mem_blk) |
c04fc586 | 836 | { |
d84f2f5a DH |
837 | if (mem_blk->nid == NUMA_NO_NODE) |
838 | return; | |
c04fc586 | 839 | |
d84f2f5a DH |
840 | sysfs_remove_link(&node_devices[mem_blk->nid]->dev.kobj, |
841 | kobject_name(&mem_blk->dev.kobj)); | |
842 | sysfs_remove_link(&mem_blk->dev.kobj, | |
843 | kobject_name(&node_devices[mem_blk->nid]->dev.kobj)); | |
c04fc586 GH |
844 | } |
845 | ||
4fbce633 | 846 | int link_mem_sections(int nid, unsigned long start_pfn, unsigned long end_pfn) |
c04fc586 | 847 | { |
fbcf73ce DH |
848 | return walk_memory_blocks(PFN_PHYS(start_pfn), |
849 | PFN_PHYS(end_pfn - start_pfn), (void *)&nid, | |
850 | register_mem_sect_under_node); | |
c04fc586 | 851 | } |
4faf8d95 | 852 | |
39da08cb | 853 | #ifdef CONFIG_HUGETLBFS |
4faf8d95 LS |
854 | /* |
855 | * Handle per node hstate attribute [un]registration on transistions | |
856 | * to/from memoryless state. | |
857 | */ | |
39da08cb LS |
858 | static void node_hugetlb_work(struct work_struct *work) |
859 | { | |
860 | struct node *node = container_of(work, struct node, node_work); | |
861 | ||
862 | /* | |
863 | * We only get here when a node transitions to/from memoryless state. | |
864 | * We can detect which transition occurred by examining whether the | |
865 | * node has memory now. hugetlb_register_node() already check this | |
866 | * so we try to register the attributes. If that fails, then the | |
867 | * node has transitioned to memoryless, try to unregister the | |
868 | * attributes. | |
869 | */ | |
870 | if (!hugetlb_register_node(node)) | |
871 | hugetlb_unregister_node(node); | |
872 | } | |
873 | ||
874 | static void init_node_hugetlb_work(int nid) | |
875 | { | |
8732794b | 876 | INIT_WORK(&node_devices[nid]->node_work, node_hugetlb_work); |
39da08cb | 877 | } |
4faf8d95 LS |
878 | |
879 | static int node_memory_callback(struct notifier_block *self, | |
880 | unsigned long action, void *arg) | |
881 | { | |
882 | struct memory_notify *mnb = arg; | |
883 | int nid = mnb->status_change_nid; | |
884 | ||
885 | switch (action) { | |
39da08cb LS |
886 | case MEM_ONLINE: |
887 | case MEM_OFFLINE: | |
888 | /* | |
889 | * offload per node hstate [un]registration to a work thread | |
890 | * when transitioning to/from memoryless state. | |
891 | */ | |
4faf8d95 | 892 | if (nid != NUMA_NO_NODE) |
8732794b | 893 | schedule_work(&node_devices[nid]->node_work); |
4faf8d95 | 894 | break; |
39da08cb | 895 | |
4faf8d95 LS |
896 | case MEM_GOING_ONLINE: |
897 | case MEM_GOING_OFFLINE: | |
898 | case MEM_CANCEL_ONLINE: | |
899 | case MEM_CANCEL_OFFLINE: | |
900 | default: | |
901 | break; | |
902 | } | |
903 | ||
904 | return NOTIFY_OK; | |
905 | } | |
39da08cb | 906 | #endif /* CONFIG_HUGETLBFS */ |
9037a993 | 907 | #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ |
4faf8d95 | 908 | |
39da08cb LS |
909 | #if !defined(CONFIG_MEMORY_HOTPLUG_SPARSE) || \ |
910 | !defined(CONFIG_HUGETLBFS) | |
4faf8d95 LS |
911 | static inline int node_memory_callback(struct notifier_block *self, |
912 | unsigned long action, void *arg) | |
913 | { | |
914 | return NOTIFY_OK; | |
915 | } | |
39da08cb LS |
916 | |
917 | static void init_node_hugetlb_work(int nid) { } | |
918 | ||
919 | #endif | |
c04fc586 | 920 | |
9037a993 | 921 | int __register_one_node(int nid) |
0fc44159 | 922 | { |
9037a993 | 923 | int error; |
76b67ed9 | 924 | int cpu; |
0fc44159 | 925 | |
9037a993 MH |
926 | node_devices[nid] = kzalloc(sizeof(struct node), GFP_KERNEL); |
927 | if (!node_devices[nid]) | |
928 | return -ENOMEM; | |
c04fc586 | 929 | |
a7be6e5a | 930 | error = register_node(node_devices[nid], nid); |
39da08cb | 931 | |
9037a993 MH |
932 | /* link cpu under this node */ |
933 | for_each_present_cpu(cpu) { | |
934 | if (cpu_to_node(cpu) == nid) | |
935 | register_cpu_under_node(cpu, nid); | |
0fc44159 YG |
936 | } |
937 | ||
08d9dbe7 | 938 | INIT_LIST_HEAD(&node_devices[nid]->access_list); |
9037a993 MH |
939 | /* initialize work queue for memory hot plug */ |
940 | init_node_hugetlb_work(nid); | |
acc02a10 | 941 | node_init_caches(nid); |
0fc44159 | 942 | |
9037a993 | 943 | return error; |
0fc44159 YG |
944 | } |
945 | ||
946 | void unregister_one_node(int nid) | |
947 | { | |
92d585ef XQ |
948 | if (!node_devices[nid]) |
949 | return; | |
950 | ||
8732794b | 951 | unregister_node(node_devices[nid]); |
8732794b | 952 | node_devices[nid] = NULL; |
0fc44159 YG |
953 | } |
954 | ||
bde631a5 LS |
955 | /* |
956 | * node states attributes | |
957 | */ | |
958 | ||
b15f562f | 959 | struct node_attr { |
10fbcf4c | 960 | struct device_attribute attr; |
b15f562f AK |
961 | enum node_states state; |
962 | }; | |
bde631a5 | 963 | |
10fbcf4c KS |
964 | static ssize_t show_node_state(struct device *dev, |
965 | struct device_attribute *attr, char *buf) | |
bde631a5 | 966 | { |
b15f562f | 967 | struct node_attr *na = container_of(attr, struct node_attr, attr); |
948b3edb JP |
968 | |
969 | return sysfs_emit(buf, "%*pbl\n", | |
970 | nodemask_pr_args(&node_states[na->state])); | |
bde631a5 LS |
971 | } |
972 | ||
b15f562f | 973 | #define _NODE_ATTR(name, state) \ |
10fbcf4c | 974 | { __ATTR(name, 0444, show_node_state, NULL), state } |
bde631a5 | 975 | |
b15f562f | 976 | static struct node_attr node_state_attr[] = { |
fcf07d22 LJ |
977 | [N_POSSIBLE] = _NODE_ATTR(possible, N_POSSIBLE), |
978 | [N_ONLINE] = _NODE_ATTR(online, N_ONLINE), | |
979 | [N_NORMAL_MEMORY] = _NODE_ATTR(has_normal_memory, N_NORMAL_MEMORY), | |
bde631a5 | 980 | #ifdef CONFIG_HIGHMEM |
fcf07d22 | 981 | [N_HIGH_MEMORY] = _NODE_ATTR(has_high_memory, N_HIGH_MEMORY), |
20b2f52b | 982 | #endif |
20b2f52b | 983 | [N_MEMORY] = _NODE_ATTR(has_memory, N_MEMORY), |
fcf07d22 | 984 | [N_CPU] = _NODE_ATTR(has_cpu, N_CPU), |
bde631a5 LS |
985 | }; |
986 | ||
10fbcf4c | 987 | static struct attribute *node_state_attrs[] = { |
fcf07d22 LJ |
988 | &node_state_attr[N_POSSIBLE].attr.attr, |
989 | &node_state_attr[N_ONLINE].attr.attr, | |
990 | &node_state_attr[N_NORMAL_MEMORY].attr.attr, | |
3701cde6 | 991 | #ifdef CONFIG_HIGHMEM |
fcf07d22 | 992 | &node_state_attr[N_HIGH_MEMORY].attr.attr, |
20b2f52b | 993 | #endif |
20b2f52b | 994 | &node_state_attr[N_MEMORY].attr.attr, |
fcf07d22 | 995 | &node_state_attr[N_CPU].attr.attr, |
3701cde6 AK |
996 | NULL |
997 | }; | |
bde631a5 | 998 | |
10fbcf4c KS |
999 | static struct attribute_group memory_root_attr_group = { |
1000 | .attrs = node_state_attrs, | |
1001 | }; | |
1002 | ||
1003 | static const struct attribute_group *cpu_root_attr_groups[] = { | |
1004 | &memory_root_attr_group, | |
1005 | NULL, | |
1006 | }; | |
1007 | ||
4faf8d95 | 1008 | #define NODE_CALLBACK_PRI 2 /* lower than SLAB */ |
4b45099b | 1009 | static int __init register_node_type(void) |
1da177e4 | 1010 | { |
bde631a5 LS |
1011 | int ret; |
1012 | ||
3701cde6 AK |
1013 | BUILD_BUG_ON(ARRAY_SIZE(node_state_attr) != NR_NODE_STATES); |
1014 | BUILD_BUG_ON(ARRAY_SIZE(node_state_attrs)-1 != NR_NODE_STATES); | |
1015 | ||
10fbcf4c | 1016 | ret = subsys_system_register(&node_subsys, cpu_root_attr_groups); |
4faf8d95 | 1017 | if (!ret) { |
6e259e7d AM |
1018 | static struct notifier_block node_memory_callback_nb = { |
1019 | .notifier_call = node_memory_callback, | |
1020 | .priority = NODE_CALLBACK_PRI, | |
1021 | }; | |
1022 | register_hotmemory_notifier(&node_memory_callback_nb); | |
4faf8d95 | 1023 | } |
bde631a5 LS |
1024 | |
1025 | /* | |
1026 | * Note: we're not going to unregister the node class if we fail | |
1027 | * to register the node state class attribute files. | |
1028 | */ | |
1029 | return ret; | |
1da177e4 LT |
1030 | } |
1031 | postcore_initcall(register_node_type); |