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f6ac2354 CL |
1 | /* |
2 | * linux/mm/vmstat.c | |
3 | * | |
4 | * Manages VM statistics | |
5 | * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds | |
2244b95a CL |
6 | * |
7 | * zoned VM statistics | |
8 | * Copyright (C) 2006 Silicon Graphics, Inc., | |
9 | * Christoph Lameter <christoph@lameter.com> | |
f6ac2354 CL |
10 | */ |
11 | ||
12 | #include <linux/config.h> | |
13 | #include <linux/mm.h> | |
2244b95a | 14 | #include <linux/module.h> |
f6ac2354 | 15 | |
f6ac2354 CL |
16 | void __get_zone_counts(unsigned long *active, unsigned long *inactive, |
17 | unsigned long *free, struct pglist_data *pgdat) | |
18 | { | |
19 | struct zone *zones = pgdat->node_zones; | |
20 | int i; | |
21 | ||
22 | *active = 0; | |
23 | *inactive = 0; | |
24 | *free = 0; | |
25 | for (i = 0; i < MAX_NR_ZONES; i++) { | |
26 | *active += zones[i].nr_active; | |
27 | *inactive += zones[i].nr_inactive; | |
28 | *free += zones[i].free_pages; | |
29 | } | |
30 | } | |
31 | ||
32 | void get_zone_counts(unsigned long *active, | |
33 | unsigned long *inactive, unsigned long *free) | |
34 | { | |
35 | struct pglist_data *pgdat; | |
36 | ||
37 | *active = 0; | |
38 | *inactive = 0; | |
39 | *free = 0; | |
40 | for_each_online_pgdat(pgdat) { | |
41 | unsigned long l, m, n; | |
42 | __get_zone_counts(&l, &m, &n, pgdat); | |
43 | *active += l; | |
44 | *inactive += m; | |
45 | *free += n; | |
46 | } | |
47 | } | |
48 | ||
f8891e5e CL |
49 | #ifdef CONFIG_VM_EVENT_COUNTERS |
50 | DEFINE_PER_CPU(struct vm_event_state, vm_event_states) = {{0}}; | |
51 | EXPORT_PER_CPU_SYMBOL(vm_event_states); | |
52 | ||
53 | static void sum_vm_events(unsigned long *ret, cpumask_t *cpumask) | |
54 | { | |
55 | int cpu = 0; | |
56 | int i; | |
57 | ||
58 | memset(ret, 0, NR_VM_EVENT_ITEMS * sizeof(unsigned long)); | |
59 | ||
60 | cpu = first_cpu(*cpumask); | |
61 | while (cpu < NR_CPUS) { | |
62 | struct vm_event_state *this = &per_cpu(vm_event_states, cpu); | |
63 | ||
64 | cpu = next_cpu(cpu, *cpumask); | |
65 | ||
66 | if (cpu < NR_CPUS) | |
67 | prefetch(&per_cpu(vm_event_states, cpu)); | |
68 | ||
69 | ||
70 | for (i = 0; i < NR_VM_EVENT_ITEMS; i++) | |
71 | ret[i] += this->event[i]; | |
72 | } | |
73 | } | |
74 | ||
75 | /* | |
76 | * Accumulate the vm event counters across all CPUs. | |
77 | * The result is unavoidably approximate - it can change | |
78 | * during and after execution of this function. | |
79 | */ | |
80 | void all_vm_events(unsigned long *ret) | |
81 | { | |
82 | sum_vm_events(ret, &cpu_online_map); | |
83 | } | |
84 | ||
85 | #ifdef CONFIG_HOTPLUG | |
86 | /* | |
87 | * Fold the foreign cpu events into our own. | |
88 | * | |
89 | * This is adding to the events on one processor | |
90 | * but keeps the global counts constant. | |
91 | */ | |
92 | void vm_events_fold_cpu(int cpu) | |
93 | { | |
94 | struct vm_event_state *fold_state = &per_cpu(vm_event_states, cpu); | |
95 | int i; | |
96 | ||
97 | for (i = 0; i < NR_VM_EVENT_ITEMS; i++) { | |
98 | count_vm_events(i, fold_state->event[i]); | |
99 | fold_state->event[i] = 0; | |
100 | } | |
101 | } | |
102 | #endif /* CONFIG_HOTPLUG */ | |
103 | ||
104 | #endif /* CONFIG_VM_EVENT_COUNTERS */ | |
105 | ||
2244b95a CL |
106 | /* |
107 | * Manage combined zone based / global counters | |
108 | * | |
109 | * vm_stat contains the global counters | |
110 | */ | |
111 | atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS]; | |
112 | EXPORT_SYMBOL(vm_stat); | |
113 | ||
114 | #ifdef CONFIG_SMP | |
115 | ||
116 | #define STAT_THRESHOLD 32 | |
117 | ||
118 | /* | |
119 | * Determine pointer to currently valid differential byte given a zone and | |
120 | * the item number. | |
121 | * | |
122 | * Preemption must be off | |
123 | */ | |
124 | static inline s8 *diff_pointer(struct zone *zone, enum zone_stat_item item) | |
125 | { | |
126 | return &zone_pcp(zone, smp_processor_id())->vm_stat_diff[item]; | |
127 | } | |
128 | ||
129 | /* | |
130 | * For use when we know that interrupts are disabled. | |
131 | */ | |
132 | void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item, | |
133 | int delta) | |
134 | { | |
135 | s8 *p; | |
136 | long x; | |
137 | ||
138 | p = diff_pointer(zone, item); | |
139 | x = delta + *p; | |
140 | ||
141 | if (unlikely(x > STAT_THRESHOLD || x < -STAT_THRESHOLD)) { | |
142 | zone_page_state_add(x, zone, item); | |
143 | x = 0; | |
144 | } | |
145 | ||
146 | *p = x; | |
147 | } | |
148 | EXPORT_SYMBOL(__mod_zone_page_state); | |
149 | ||
150 | /* | |
151 | * For an unknown interrupt state | |
152 | */ | |
153 | void mod_zone_page_state(struct zone *zone, enum zone_stat_item item, | |
154 | int delta) | |
155 | { | |
156 | unsigned long flags; | |
157 | ||
158 | local_irq_save(flags); | |
159 | __mod_zone_page_state(zone, item, delta); | |
160 | local_irq_restore(flags); | |
161 | } | |
162 | EXPORT_SYMBOL(mod_zone_page_state); | |
163 | ||
164 | /* | |
165 | * Optimized increment and decrement functions. | |
166 | * | |
167 | * These are only for a single page and therefore can take a struct page * | |
168 | * argument instead of struct zone *. This allows the inclusion of the code | |
169 | * generated for page_zone(page) into the optimized functions. | |
170 | * | |
171 | * No overflow check is necessary and therefore the differential can be | |
172 | * incremented or decremented in place which may allow the compilers to | |
173 | * generate better code. | |
174 | * | |
175 | * The increment or decrement is known and therefore one boundary check can | |
176 | * be omitted. | |
177 | * | |
178 | * Some processors have inc/dec instructions that are atomic vs an interrupt. | |
179 | * However, the code must first determine the differential location in a zone | |
180 | * based on the processor number and then inc/dec the counter. There is no | |
181 | * guarantee without disabling preemption that the processor will not change | |
182 | * in between and therefore the atomicity vs. interrupt cannot be exploited | |
183 | * in a useful way here. | |
184 | */ | |
ca889e6c | 185 | static void __inc_zone_state(struct zone *zone, enum zone_stat_item item) |
2244b95a | 186 | { |
2244b95a CL |
187 | s8 *p = diff_pointer(zone, item); |
188 | ||
189 | (*p)++; | |
190 | ||
191 | if (unlikely(*p > STAT_THRESHOLD)) { | |
192 | zone_page_state_add(*p, zone, item); | |
193 | *p = 0; | |
194 | } | |
195 | } | |
ca889e6c CL |
196 | |
197 | void __inc_zone_page_state(struct page *page, enum zone_stat_item item) | |
198 | { | |
199 | __inc_zone_state(page_zone(page), item); | |
200 | } | |
2244b95a CL |
201 | EXPORT_SYMBOL(__inc_zone_page_state); |
202 | ||
203 | void __dec_zone_page_state(struct page *page, enum zone_stat_item item) | |
204 | { | |
205 | struct zone *zone = page_zone(page); | |
206 | s8 *p = diff_pointer(zone, item); | |
207 | ||
208 | (*p)--; | |
209 | ||
210 | if (unlikely(*p < -STAT_THRESHOLD)) { | |
211 | zone_page_state_add(*p, zone, item); | |
212 | *p = 0; | |
213 | } | |
214 | } | |
215 | EXPORT_SYMBOL(__dec_zone_page_state); | |
216 | ||
ca889e6c CL |
217 | void inc_zone_state(struct zone *zone, enum zone_stat_item item) |
218 | { | |
219 | unsigned long flags; | |
220 | ||
221 | local_irq_save(flags); | |
222 | __inc_zone_state(zone, item); | |
223 | local_irq_restore(flags); | |
224 | } | |
225 | ||
2244b95a CL |
226 | void inc_zone_page_state(struct page *page, enum zone_stat_item item) |
227 | { | |
228 | unsigned long flags; | |
229 | struct zone *zone; | |
2244b95a CL |
230 | |
231 | zone = page_zone(page); | |
232 | local_irq_save(flags); | |
ca889e6c | 233 | __inc_zone_state(zone, item); |
2244b95a CL |
234 | local_irq_restore(flags); |
235 | } | |
236 | EXPORT_SYMBOL(inc_zone_page_state); | |
237 | ||
238 | void dec_zone_page_state(struct page *page, enum zone_stat_item item) | |
239 | { | |
240 | unsigned long flags; | |
241 | struct zone *zone; | |
242 | s8 *p; | |
243 | ||
244 | zone = page_zone(page); | |
245 | local_irq_save(flags); | |
246 | p = diff_pointer(zone, item); | |
247 | ||
248 | (*p)--; | |
249 | ||
250 | if (unlikely(*p < -STAT_THRESHOLD)) { | |
251 | zone_page_state_add(*p, zone, item); | |
252 | *p = 0; | |
253 | } | |
254 | local_irq_restore(flags); | |
255 | } | |
256 | EXPORT_SYMBOL(dec_zone_page_state); | |
257 | ||
258 | /* | |
259 | * Update the zone counters for one cpu. | |
260 | */ | |
261 | void refresh_cpu_vm_stats(int cpu) | |
262 | { | |
263 | struct zone *zone; | |
264 | int i; | |
265 | unsigned long flags; | |
266 | ||
267 | for_each_zone(zone) { | |
268 | struct per_cpu_pageset *pcp; | |
269 | ||
270 | pcp = zone_pcp(zone, cpu); | |
271 | ||
272 | for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) | |
273 | if (pcp->vm_stat_diff[i]) { | |
274 | local_irq_save(flags); | |
275 | zone_page_state_add(pcp->vm_stat_diff[i], | |
276 | zone, i); | |
277 | pcp->vm_stat_diff[i] = 0; | |
278 | local_irq_restore(flags); | |
279 | } | |
280 | } | |
281 | } | |
282 | ||
283 | static void __refresh_cpu_vm_stats(void *dummy) | |
284 | { | |
285 | refresh_cpu_vm_stats(smp_processor_id()); | |
286 | } | |
287 | ||
288 | /* | |
289 | * Consolidate all counters. | |
290 | * | |
291 | * Note that the result is less inaccurate but still inaccurate | |
292 | * if concurrent processes are allowed to run. | |
293 | */ | |
294 | void refresh_vm_stats(void) | |
295 | { | |
296 | on_each_cpu(__refresh_cpu_vm_stats, NULL, 0, 1); | |
297 | } | |
298 | EXPORT_SYMBOL(refresh_vm_stats); | |
299 | ||
300 | #endif | |
301 | ||
ca889e6c CL |
302 | #ifdef CONFIG_NUMA |
303 | /* | |
304 | * zonelist = the list of zones passed to the allocator | |
305 | * z = the zone from which the allocation occurred. | |
306 | * | |
307 | * Must be called with interrupts disabled. | |
308 | */ | |
309 | void zone_statistics(struct zonelist *zonelist, struct zone *z) | |
310 | { | |
311 | if (z->zone_pgdat == zonelist->zones[0]->zone_pgdat) { | |
312 | __inc_zone_state(z, NUMA_HIT); | |
313 | } else { | |
314 | __inc_zone_state(z, NUMA_MISS); | |
315 | __inc_zone_state(zonelist->zones[0], NUMA_FOREIGN); | |
316 | } | |
317 | if (z->zone_pgdat == NODE_DATA(numa_node_id())) | |
318 | __inc_zone_state(z, NUMA_LOCAL); | |
319 | else | |
320 | __inc_zone_state(z, NUMA_OTHER); | |
321 | } | |
322 | #endif | |
323 | ||
f6ac2354 CL |
324 | #ifdef CONFIG_PROC_FS |
325 | ||
326 | #include <linux/seq_file.h> | |
327 | ||
328 | static void *frag_start(struct seq_file *m, loff_t *pos) | |
329 | { | |
330 | pg_data_t *pgdat; | |
331 | loff_t node = *pos; | |
332 | for (pgdat = first_online_pgdat(); | |
333 | pgdat && node; | |
334 | pgdat = next_online_pgdat(pgdat)) | |
335 | --node; | |
336 | ||
337 | return pgdat; | |
338 | } | |
339 | ||
340 | static void *frag_next(struct seq_file *m, void *arg, loff_t *pos) | |
341 | { | |
342 | pg_data_t *pgdat = (pg_data_t *)arg; | |
343 | ||
344 | (*pos)++; | |
345 | return next_online_pgdat(pgdat); | |
346 | } | |
347 | ||
348 | static void frag_stop(struct seq_file *m, void *arg) | |
349 | { | |
350 | } | |
351 | ||
352 | /* | |
353 | * This walks the free areas for each zone. | |
354 | */ | |
355 | static int frag_show(struct seq_file *m, void *arg) | |
356 | { | |
357 | pg_data_t *pgdat = (pg_data_t *)arg; | |
358 | struct zone *zone; | |
359 | struct zone *node_zones = pgdat->node_zones; | |
360 | unsigned long flags; | |
361 | int order; | |
362 | ||
363 | for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; ++zone) { | |
364 | if (!populated_zone(zone)) | |
365 | continue; | |
366 | ||
367 | spin_lock_irqsave(&zone->lock, flags); | |
368 | seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name); | |
369 | for (order = 0; order < MAX_ORDER; ++order) | |
370 | seq_printf(m, "%6lu ", zone->free_area[order].nr_free); | |
371 | spin_unlock_irqrestore(&zone->lock, flags); | |
372 | seq_putc(m, '\n'); | |
373 | } | |
374 | return 0; | |
375 | } | |
376 | ||
377 | struct seq_operations fragmentation_op = { | |
378 | .start = frag_start, | |
379 | .next = frag_next, | |
380 | .stop = frag_stop, | |
381 | .show = frag_show, | |
382 | }; | |
383 | ||
384 | static char *vmstat_text[] = { | |
2244b95a | 385 | /* Zoned VM counters */ |
f3dbd344 | 386 | "nr_anon_pages", |
65ba55f5 | 387 | "nr_mapped", |
347ce434 | 388 | "nr_file_pages", |
9a865ffa | 389 | "nr_slab", |
df849a15 | 390 | "nr_page_table_pages", |
b1e7a8fd | 391 | "nr_dirty", |
ce866b34 | 392 | "nr_writeback", |
f6ac2354 | 393 | "nr_unstable", |
d2c5e30c | 394 | "nr_bounce", |
f6ac2354 | 395 | |
ca889e6c CL |
396 | #ifdef CONFIG_NUMA |
397 | "numa_hit", | |
398 | "numa_miss", | |
399 | "numa_foreign", | |
400 | "numa_interleave", | |
401 | "numa_local", | |
402 | "numa_other", | |
403 | #endif | |
404 | ||
f8891e5e | 405 | #ifdef CONFIG_VM_EVENT_COUNTERS |
f6ac2354 CL |
406 | "pgpgin", |
407 | "pgpgout", | |
408 | "pswpin", | |
409 | "pswpout", | |
410 | ||
f6ac2354 | 411 | "pgalloc_dma", |
f8891e5e CL |
412 | "pgalloc_dma32", |
413 | "pgalloc_normal", | |
414 | "pgalloc_high", | |
f6ac2354 CL |
415 | |
416 | "pgfree", | |
417 | "pgactivate", | |
418 | "pgdeactivate", | |
419 | ||
420 | "pgfault", | |
421 | "pgmajfault", | |
422 | ||
f6ac2354 | 423 | "pgrefill_dma", |
f8891e5e CL |
424 | "pgrefill_dma32", |
425 | "pgrefill_normal", | |
426 | "pgrefill_high", | |
f6ac2354 | 427 | |
f6ac2354 | 428 | "pgsteal_dma", |
f8891e5e CL |
429 | "pgsteal_dma32", |
430 | "pgsteal_normal", | |
431 | "pgsteal_high", | |
f6ac2354 | 432 | |
f6ac2354 | 433 | "pgscan_kswapd_dma", |
f8891e5e CL |
434 | "pgscan_kswapd_dma32", |
435 | "pgscan_kswapd_normal", | |
436 | "pgscan_kswapd_high", | |
f6ac2354 | 437 | |
f6ac2354 | 438 | "pgscan_direct_dma", |
f8891e5e CL |
439 | "pgscan_direct_dma32", |
440 | "pgscan_direct_normal", | |
441 | "pgscan_direct_high", | |
f6ac2354 CL |
442 | |
443 | "pginodesteal", | |
444 | "slabs_scanned", | |
445 | "kswapd_steal", | |
446 | "kswapd_inodesteal", | |
447 | "pageoutrun", | |
448 | "allocstall", | |
449 | ||
450 | "pgrotated", | |
f8891e5e | 451 | #endif |
f6ac2354 CL |
452 | }; |
453 | ||
454 | /* | |
455 | * Output information about zones in @pgdat. | |
456 | */ | |
457 | static int zoneinfo_show(struct seq_file *m, void *arg) | |
458 | { | |
459 | pg_data_t *pgdat = arg; | |
460 | struct zone *zone; | |
461 | struct zone *node_zones = pgdat->node_zones; | |
462 | unsigned long flags; | |
463 | ||
464 | for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; zone++) { | |
465 | int i; | |
466 | ||
467 | if (!populated_zone(zone)) | |
468 | continue; | |
469 | ||
470 | spin_lock_irqsave(&zone->lock, flags); | |
471 | seq_printf(m, "Node %d, zone %8s", pgdat->node_id, zone->name); | |
472 | seq_printf(m, | |
473 | "\n pages free %lu" | |
474 | "\n min %lu" | |
475 | "\n low %lu" | |
476 | "\n high %lu" | |
477 | "\n active %lu" | |
478 | "\n inactive %lu" | |
479 | "\n scanned %lu (a: %lu i: %lu)" | |
480 | "\n spanned %lu" | |
481 | "\n present %lu", | |
482 | zone->free_pages, | |
483 | zone->pages_min, | |
484 | zone->pages_low, | |
485 | zone->pages_high, | |
486 | zone->nr_active, | |
487 | zone->nr_inactive, | |
488 | zone->pages_scanned, | |
489 | zone->nr_scan_active, zone->nr_scan_inactive, | |
490 | zone->spanned_pages, | |
491 | zone->present_pages); | |
2244b95a CL |
492 | |
493 | for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) | |
494 | seq_printf(m, "\n %-12s %lu", vmstat_text[i], | |
495 | zone_page_state(zone, i)); | |
496 | ||
f6ac2354 CL |
497 | seq_printf(m, |
498 | "\n protection: (%lu", | |
499 | zone->lowmem_reserve[0]); | |
500 | for (i = 1; i < ARRAY_SIZE(zone->lowmem_reserve); i++) | |
501 | seq_printf(m, ", %lu", zone->lowmem_reserve[i]); | |
502 | seq_printf(m, | |
503 | ")" | |
504 | "\n pagesets"); | |
505 | for_each_online_cpu(i) { | |
506 | struct per_cpu_pageset *pageset; | |
507 | int j; | |
508 | ||
509 | pageset = zone_pcp(zone, i); | |
510 | for (j = 0; j < ARRAY_SIZE(pageset->pcp); j++) { | |
511 | if (pageset->pcp[j].count) | |
512 | break; | |
513 | } | |
514 | if (j == ARRAY_SIZE(pageset->pcp)) | |
515 | continue; | |
516 | for (j = 0; j < ARRAY_SIZE(pageset->pcp); j++) { | |
517 | seq_printf(m, | |
518 | "\n cpu: %i pcp: %i" | |
519 | "\n count: %i" | |
520 | "\n high: %i" | |
521 | "\n batch: %i", | |
522 | i, j, | |
523 | pageset->pcp[j].count, | |
524 | pageset->pcp[j].high, | |
525 | pageset->pcp[j].batch); | |
526 | } | |
f6ac2354 CL |
527 | } |
528 | seq_printf(m, | |
529 | "\n all_unreclaimable: %u" | |
530 | "\n prev_priority: %i" | |
531 | "\n temp_priority: %i" | |
532 | "\n start_pfn: %lu", | |
533 | zone->all_unreclaimable, | |
534 | zone->prev_priority, | |
535 | zone->temp_priority, | |
536 | zone->zone_start_pfn); | |
537 | spin_unlock_irqrestore(&zone->lock, flags); | |
538 | seq_putc(m, '\n'); | |
539 | } | |
540 | return 0; | |
541 | } | |
542 | ||
543 | struct seq_operations zoneinfo_op = { | |
544 | .start = frag_start, /* iterate over all zones. The same as in | |
545 | * fragmentation. */ | |
546 | .next = frag_next, | |
547 | .stop = frag_stop, | |
548 | .show = zoneinfo_show, | |
549 | }; | |
550 | ||
551 | static void *vmstat_start(struct seq_file *m, loff_t *pos) | |
552 | { | |
2244b95a | 553 | unsigned long *v; |
f8891e5e CL |
554 | #ifdef CONFIG_VM_EVENT_COUNTERS |
555 | unsigned long *e; | |
556 | #endif | |
2244b95a | 557 | int i; |
f6ac2354 CL |
558 | |
559 | if (*pos >= ARRAY_SIZE(vmstat_text)) | |
560 | return NULL; | |
561 | ||
f8891e5e | 562 | #ifdef CONFIG_VM_EVENT_COUNTERS |
2244b95a | 563 | v = kmalloc(NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long) |
f8891e5e CL |
564 | + sizeof(struct vm_event_state), GFP_KERNEL); |
565 | #else | |
566 | v = kmalloc(NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long), | |
567 | GFP_KERNEL); | |
568 | #endif | |
2244b95a CL |
569 | m->private = v; |
570 | if (!v) | |
f6ac2354 | 571 | return ERR_PTR(-ENOMEM); |
2244b95a CL |
572 | for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) |
573 | v[i] = global_page_state(i); | |
f8891e5e CL |
574 | #ifdef CONFIG_VM_EVENT_COUNTERS |
575 | e = v + NR_VM_ZONE_STAT_ITEMS; | |
576 | all_vm_events(e); | |
577 | e[PGPGIN] /= 2; /* sectors -> kbytes */ | |
578 | e[PGPGOUT] /= 2; | |
579 | #endif | |
2244b95a | 580 | return v + *pos; |
f6ac2354 CL |
581 | } |
582 | ||
583 | static void *vmstat_next(struct seq_file *m, void *arg, loff_t *pos) | |
584 | { | |
585 | (*pos)++; | |
586 | if (*pos >= ARRAY_SIZE(vmstat_text)) | |
587 | return NULL; | |
588 | return (unsigned long *)m->private + *pos; | |
589 | } | |
590 | ||
591 | static int vmstat_show(struct seq_file *m, void *arg) | |
592 | { | |
593 | unsigned long *l = arg; | |
594 | unsigned long off = l - (unsigned long *)m->private; | |
595 | ||
596 | seq_printf(m, "%s %lu\n", vmstat_text[off], *l); | |
597 | return 0; | |
598 | } | |
599 | ||
600 | static void vmstat_stop(struct seq_file *m, void *arg) | |
601 | { | |
602 | kfree(m->private); | |
603 | m->private = NULL; | |
604 | } | |
605 | ||
606 | struct seq_operations vmstat_op = { | |
607 | .start = vmstat_start, | |
608 | .next = vmstat_next, | |
609 | .stop = vmstat_stop, | |
610 | .show = vmstat_show, | |
611 | }; | |
612 | ||
613 | #endif /* CONFIG_PROC_FS */ | |
614 |