Commit | Line | Data |
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2bc64a20 AK |
1 | /* |
2 | * | |
3 | * Copyright IBM Corporation, 2012 | |
4 | * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | |
5 | * | |
faced7e0 GS |
6 | * Cgroup v2 |
7 | * Copyright (C) 2019 Red Hat, Inc. | |
8 | * Author: Giuseppe Scrivano <gscrivan@redhat.com> | |
9 | * | |
2bc64a20 AK |
10 | * This program is free software; you can redistribute it and/or modify it |
11 | * under the terms of version 2.1 of the GNU Lesser General Public License | |
12 | * as published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it would be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <linux/cgroup.h> | |
71f87bee | 21 | #include <linux/page_counter.h> |
2bc64a20 AK |
22 | #include <linux/slab.h> |
23 | #include <linux/hugetlb.h> | |
24 | #include <linux/hugetlb_cgroup.h> | |
25 | ||
abb8206c AK |
26 | #define MEMFILE_PRIVATE(x, val) (((x) << 16) | (val)) |
27 | #define MEMFILE_IDX(val) (((val) >> 16) & 0xffff) | |
28 | #define MEMFILE_ATTR(val) ((val) & 0xffff) | |
29 | ||
2bc64a20 AK |
30 | static struct hugetlb_cgroup *root_h_cgroup __read_mostly; |
31 | ||
cdc2fcfe | 32 | static inline struct page_counter * |
1adc4d41 MA |
33 | __hugetlb_cgroup_counter_from_cgroup(struct hugetlb_cgroup *h_cg, int idx, |
34 | bool rsvd) | |
cdc2fcfe MA |
35 | { |
36 | if (rsvd) | |
37 | return &h_cg->rsvd_hugepage[idx]; | |
38 | return &h_cg->hugepage[idx]; | |
39 | } | |
40 | ||
1adc4d41 MA |
41 | static inline struct page_counter * |
42 | hugetlb_cgroup_counter_from_cgroup(struct hugetlb_cgroup *h_cg, int idx) | |
43 | { | |
44 | return __hugetlb_cgroup_counter_from_cgroup(h_cg, idx, false); | |
45 | } | |
46 | ||
47 | static inline struct page_counter * | |
48 | hugetlb_cgroup_counter_from_cgroup_rsvd(struct hugetlb_cgroup *h_cg, int idx) | |
49 | { | |
50 | return __hugetlb_cgroup_counter_from_cgroup(h_cg, idx, true); | |
51 | } | |
52 | ||
2bc64a20 AK |
53 | static inline |
54 | struct hugetlb_cgroup *hugetlb_cgroup_from_css(struct cgroup_subsys_state *s) | |
55 | { | |
a7c6d554 | 56 | return s ? container_of(s, struct hugetlb_cgroup, css) : NULL; |
2bc64a20 AK |
57 | } |
58 | ||
2bc64a20 AK |
59 | static inline |
60 | struct hugetlb_cgroup *hugetlb_cgroup_from_task(struct task_struct *task) | |
61 | { | |
073219e9 | 62 | return hugetlb_cgroup_from_css(task_css(task, hugetlb_cgrp_id)); |
2bc64a20 AK |
63 | } |
64 | ||
65 | static inline bool hugetlb_cgroup_is_root(struct hugetlb_cgroup *h_cg) | |
66 | { | |
67 | return (h_cg == root_h_cgroup); | |
68 | } | |
69 | ||
3f798518 TH |
70 | static inline struct hugetlb_cgroup * |
71 | parent_hugetlb_cgroup(struct hugetlb_cgroup *h_cg) | |
2bc64a20 | 72 | { |
5c9d535b | 73 | return hugetlb_cgroup_from_css(h_cg->css.parent); |
2bc64a20 AK |
74 | } |
75 | ||
3f798518 | 76 | static inline bool hugetlb_cgroup_have_usage(struct hugetlb_cgroup *h_cg) |
2bc64a20 | 77 | { |
c37213c5 | 78 | struct hstate *h; |
2bc64a20 | 79 | |
c37213c5 | 80 | for_each_hstate(h) { |
1adc4d41 | 81 | if (page_counter_read( |
c37213c5 | 82 | hugetlb_cgroup_counter_from_cgroup(h_cg, hstate_index(h)))) |
2bc64a20 AK |
83 | return true; |
84 | } | |
85 | return false; | |
86 | } | |
87 | ||
297880f4 DR |
88 | static void hugetlb_cgroup_init(struct hugetlb_cgroup *h_cgroup, |
89 | struct hugetlb_cgroup *parent_h_cgroup) | |
90 | { | |
91 | int idx; | |
92 | ||
93 | for (idx = 0; idx < HUGE_MAX_HSTATE; idx++) { | |
1adc4d41 MA |
94 | struct page_counter *fault_parent = NULL; |
95 | struct page_counter *rsvd_parent = NULL; | |
297880f4 DR |
96 | unsigned long limit; |
97 | int ret; | |
98 | ||
1adc4d41 MA |
99 | if (parent_h_cgroup) { |
100 | fault_parent = hugetlb_cgroup_counter_from_cgroup( | |
101 | parent_h_cgroup, idx); | |
102 | rsvd_parent = hugetlb_cgroup_counter_from_cgroup_rsvd( | |
103 | parent_h_cgroup, idx); | |
104 | } | |
105 | page_counter_init(hugetlb_cgroup_counter_from_cgroup(h_cgroup, | |
106 | idx), | |
107 | fault_parent); | |
108 | page_counter_init( | |
109 | hugetlb_cgroup_counter_from_cgroup_rsvd(h_cgroup, idx), | |
110 | rsvd_parent); | |
297880f4 DR |
111 | |
112 | limit = round_down(PAGE_COUNTER_MAX, | |
8938494c | 113 | pages_per_huge_page(&hstates[idx])); |
1adc4d41 MA |
114 | |
115 | ret = page_counter_set_max( | |
116 | hugetlb_cgroup_counter_from_cgroup(h_cgroup, idx), | |
117 | limit); | |
118 | VM_BUG_ON(ret); | |
119 | ret = page_counter_set_max( | |
120 | hugetlb_cgroup_counter_from_cgroup_rsvd(h_cgroup, idx), | |
121 | limit); | |
297880f4 DR |
122 | VM_BUG_ON(ret); |
123 | } | |
124 | } | |
125 | ||
f4776199 MA |
126 | static void hugetlb_cgroup_free(struct hugetlb_cgroup *h_cgroup) |
127 | { | |
128 | int node; | |
129 | ||
130 | for_each_node(node) | |
131 | kfree(h_cgroup->nodeinfo[node]); | |
132 | kfree(h_cgroup); | |
133 | } | |
134 | ||
eb95419b TH |
135 | static struct cgroup_subsys_state * |
136 | hugetlb_cgroup_css_alloc(struct cgroup_subsys_state *parent_css) | |
2bc64a20 | 137 | { |
eb95419b TH |
138 | struct hugetlb_cgroup *parent_h_cgroup = hugetlb_cgroup_from_css(parent_css); |
139 | struct hugetlb_cgroup *h_cgroup; | |
f4776199 MA |
140 | int node; |
141 | ||
142 | h_cgroup = kzalloc(struct_size(h_cgroup, nodeinfo, nr_node_ids), | |
143 | GFP_KERNEL); | |
2bc64a20 | 144 | |
2bc64a20 AK |
145 | if (!h_cgroup) |
146 | return ERR_PTR(-ENOMEM); | |
147 | ||
297880f4 | 148 | if (!parent_h_cgroup) |
2bc64a20 | 149 | root_h_cgroup = h_cgroup; |
297880f4 | 150 | |
f4776199 MA |
151 | /* |
152 | * TODO: this routine can waste much memory for nodes which will | |
153 | * never be onlined. It's better to use memory hotplug callback | |
154 | * function. | |
155 | */ | |
156 | for_each_node(node) { | |
99249387 | 157 | /* Set node_to_alloc to NUMA_NO_NODE for offline nodes. */ |
f4776199 | 158 | int node_to_alloc = |
99249387 | 159 | node_state(node, N_NORMAL_MEMORY) ? node : NUMA_NO_NODE; |
f4776199 MA |
160 | h_cgroup->nodeinfo[node] = |
161 | kzalloc_node(sizeof(struct hugetlb_cgroup_per_node), | |
162 | GFP_KERNEL, node_to_alloc); | |
163 | if (!h_cgroup->nodeinfo[node]) | |
164 | goto fail_alloc_nodeinfo; | |
165 | } | |
166 | ||
297880f4 | 167 | hugetlb_cgroup_init(h_cgroup, parent_h_cgroup); |
2bc64a20 | 168 | return &h_cgroup->css; |
f4776199 MA |
169 | |
170 | fail_alloc_nodeinfo: | |
171 | hugetlb_cgroup_free(h_cgroup); | |
172 | return ERR_PTR(-ENOMEM); | |
2bc64a20 AK |
173 | } |
174 | ||
eb95419b | 175 | static void hugetlb_cgroup_css_free(struct cgroup_subsys_state *css) |
2bc64a20 | 176 | { |
f4776199 | 177 | hugetlb_cgroup_free(hugetlb_cgroup_from_css(css)); |
2bc64a20 AK |
178 | } |
179 | ||
da1def55 AK |
180 | /* |
181 | * Should be called with hugetlb_lock held. | |
182 | * Since we are holding hugetlb_lock, pages cannot get moved from | |
183 | * active list or uncharged from the cgroup, So no need to get | |
184 | * page reference and test for page active here. This function | |
185 | * cannot fail. | |
186 | */ | |
3f798518 | 187 | static void hugetlb_cgroup_move_parent(int idx, struct hugetlb_cgroup *h_cg, |
da1def55 AK |
188 | struct page *page) |
189 | { | |
71f87bee JW |
190 | unsigned int nr_pages; |
191 | struct page_counter *counter; | |
da1def55 | 192 | struct hugetlb_cgroup *page_hcg; |
3f798518 | 193 | struct hugetlb_cgroup *parent = parent_hugetlb_cgroup(h_cg); |
da1def55 AK |
194 | |
195 | page_hcg = hugetlb_cgroup_from_page(page); | |
196 | /* | |
197 | * We can have pages in active list without any cgroup | |
198 | * ie, hugepage with less than 3 pages. We can safely | |
199 | * ignore those pages. | |
200 | */ | |
201 | if (!page_hcg || page_hcg != h_cg) | |
202 | goto out; | |
203 | ||
d8c6546b | 204 | nr_pages = compound_nr(page); |
da1def55 AK |
205 | if (!parent) { |
206 | parent = root_h_cgroup; | |
207 | /* root has no limit */ | |
71f87bee | 208 | page_counter_charge(&parent->hugepage[idx], nr_pages); |
da1def55 AK |
209 | } |
210 | counter = &h_cg->hugepage[idx]; | |
71f87bee JW |
211 | /* Take the pages off the local counter */ |
212 | page_counter_cancel(counter, nr_pages); | |
da1def55 AK |
213 | |
214 | set_hugetlb_cgroup(page, parent); | |
215 | out: | |
216 | return; | |
217 | } | |
218 | ||
219 | /* | |
220 | * Force the hugetlb cgroup to empty the hugetlb resources by moving them to | |
221 | * the parent cgroup. | |
222 | */ | |
eb95419b | 223 | static void hugetlb_cgroup_css_offline(struct cgroup_subsys_state *css) |
2bc64a20 | 224 | { |
eb95419b | 225 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(css); |
da1def55 AK |
226 | struct hstate *h; |
227 | struct page *page; | |
da1def55 AK |
228 | |
229 | do { | |
da1def55 | 230 | for_each_hstate(h) { |
db71ef79 | 231 | spin_lock_irq(&hugetlb_lock); |
da1def55 | 232 | list_for_each_entry(page, &h->hugepage_activelist, lru) |
c37213c5 | 233 | hugetlb_cgroup_move_parent(hstate_index(h), h_cg, page); |
da1def55 | 234 | |
db71ef79 | 235 | spin_unlock_irq(&hugetlb_lock); |
da1def55 AK |
236 | } |
237 | cond_resched(); | |
3f798518 | 238 | } while (hugetlb_cgroup_have_usage(h_cg)); |
2bc64a20 AK |
239 | } |
240 | ||
faced7e0 GS |
241 | static inline void hugetlb_event(struct hugetlb_cgroup *hugetlb, int idx, |
242 | enum hugetlb_memory_event event) | |
243 | { | |
244 | atomic_long_inc(&hugetlb->events_local[idx][event]); | |
245 | cgroup_file_notify(&hugetlb->events_local_file[idx]); | |
246 | ||
247 | do { | |
248 | atomic_long_inc(&hugetlb->events[idx][event]); | |
249 | cgroup_file_notify(&hugetlb->events_file[idx]); | |
250 | } while ((hugetlb = parent_hugetlb_cgroup(hugetlb)) && | |
251 | !hugetlb_cgroup_is_root(hugetlb)); | |
252 | } | |
253 | ||
1adc4d41 MA |
254 | static int __hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages, |
255 | struct hugetlb_cgroup **ptr, | |
256 | bool rsvd) | |
6d76dcf4 AK |
257 | { |
258 | int ret = 0; | |
71f87bee | 259 | struct page_counter *counter; |
6d76dcf4 | 260 | struct hugetlb_cgroup *h_cg = NULL; |
6d76dcf4 AK |
261 | |
262 | if (hugetlb_cgroup_disabled()) | |
263 | goto done; | |
264 | /* | |
265 | * We don't charge any cgroup if the compound page have less | |
266 | * than 3 pages. | |
267 | */ | |
268 | if (huge_page_order(&hstates[idx]) < HUGETLB_CGROUP_MIN_ORDER) | |
269 | goto done; | |
270 | again: | |
271 | rcu_read_lock(); | |
272 | h_cg = hugetlb_cgroup_from_task(current); | |
0362f326 | 273 | if (!css_tryget(&h_cg->css)) { |
6d76dcf4 AK |
274 | rcu_read_unlock(); |
275 | goto again; | |
276 | } | |
277 | rcu_read_unlock(); | |
278 | ||
1adc4d41 MA |
279 | if (!page_counter_try_charge( |
280 | __hugetlb_cgroup_counter_from_cgroup(h_cg, idx, rsvd), | |
281 | nr_pages, &counter)) { | |
6071ca52 | 282 | ret = -ENOMEM; |
726b7bbe | 283 | hugetlb_event(h_cg, idx, HUGETLB_MAX); |
1adc4d41 MA |
284 | css_put(&h_cg->css); |
285 | goto done; | |
faced7e0 | 286 | } |
1adc4d41 MA |
287 | /* Reservations take a reference to the css because they do not get |
288 | * reparented. | |
289 | */ | |
290 | if (!rsvd) | |
291 | css_put(&h_cg->css); | |
6d76dcf4 AK |
292 | done: |
293 | *ptr = h_cg; | |
294 | return ret; | |
295 | } | |
296 | ||
1adc4d41 MA |
297 | int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages, |
298 | struct hugetlb_cgroup **ptr) | |
299 | { | |
300 | return __hugetlb_cgroup_charge_cgroup(idx, nr_pages, ptr, false); | |
301 | } | |
302 | ||
303 | int hugetlb_cgroup_charge_cgroup_rsvd(int idx, unsigned long nr_pages, | |
304 | struct hugetlb_cgroup **ptr) | |
305 | { | |
306 | return __hugetlb_cgroup_charge_cgroup(idx, nr_pages, ptr, true); | |
307 | } | |
308 | ||
94ae8ba7 | 309 | /* Should be called with hugetlb_lock held */ |
1adc4d41 MA |
310 | static void __hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages, |
311 | struct hugetlb_cgroup *h_cg, | |
312 | struct page *page, bool rsvd) | |
6d76dcf4 AK |
313 | { |
314 | if (hugetlb_cgroup_disabled() || !h_cg) | |
315 | return; | |
316 | ||
1adc4d41 | 317 | __set_hugetlb_cgroup(page, h_cg, rsvd); |
f4776199 MA |
318 | if (!rsvd) { |
319 | unsigned long usage = | |
320 | h_cg->nodeinfo[page_to_nid(page)]->usage[idx]; | |
321 | /* | |
322 | * This write is not atomic due to fetching usage and writing | |
323 | * to it, but that's fine because we call this with | |
324 | * hugetlb_lock held anyway. | |
325 | */ | |
326 | WRITE_ONCE(h_cg->nodeinfo[page_to_nid(page)]->usage[idx], | |
327 | usage + nr_pages); | |
328 | } | |
6d76dcf4 AK |
329 | } |
330 | ||
1adc4d41 MA |
331 | void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages, |
332 | struct hugetlb_cgroup *h_cg, | |
333 | struct page *page) | |
334 | { | |
335 | __hugetlb_cgroup_commit_charge(idx, nr_pages, h_cg, page, false); | |
336 | } | |
337 | ||
338 | void hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages, | |
339 | struct hugetlb_cgroup *h_cg, | |
340 | struct page *page) | |
341 | { | |
342 | __hugetlb_cgroup_commit_charge(idx, nr_pages, h_cg, page, true); | |
343 | } | |
344 | ||
6d76dcf4 AK |
345 | /* |
346 | * Should be called with hugetlb_lock held | |
347 | */ | |
1adc4d41 MA |
348 | static void __hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages, |
349 | struct page *page, bool rsvd) | |
6d76dcf4 AK |
350 | { |
351 | struct hugetlb_cgroup *h_cg; | |
6d76dcf4 AK |
352 | |
353 | if (hugetlb_cgroup_disabled()) | |
354 | return; | |
7ea8574e | 355 | lockdep_assert_held(&hugetlb_lock); |
1adc4d41 | 356 | h_cg = __hugetlb_cgroup_from_page(page, rsvd); |
6d76dcf4 AK |
357 | if (unlikely(!h_cg)) |
358 | return; | |
1adc4d41 MA |
359 | __set_hugetlb_cgroup(page, NULL, rsvd); |
360 | ||
361 | page_counter_uncharge(__hugetlb_cgroup_counter_from_cgroup(h_cg, idx, | |
362 | rsvd), | |
363 | nr_pages); | |
364 | ||
365 | if (rsvd) | |
366 | css_put(&h_cg->css); | |
f4776199 MA |
367 | else { |
368 | unsigned long usage = | |
369 | h_cg->nodeinfo[page_to_nid(page)]->usage[idx]; | |
370 | /* | |
371 | * This write is not atomic due to fetching usage and writing | |
372 | * to it, but that's fine because we call this with | |
373 | * hugetlb_lock held anyway. | |
374 | */ | |
375 | WRITE_ONCE(h_cg->nodeinfo[page_to_nid(page)]->usage[idx], | |
376 | usage - nr_pages); | |
377 | } | |
6d76dcf4 AK |
378 | } |
379 | ||
1adc4d41 MA |
380 | void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages, |
381 | struct page *page) | |
382 | { | |
383 | __hugetlb_cgroup_uncharge_page(idx, nr_pages, page, false); | |
384 | } | |
385 | ||
386 | void hugetlb_cgroup_uncharge_page_rsvd(int idx, unsigned long nr_pages, | |
387 | struct page *page) | |
388 | { | |
389 | __hugetlb_cgroup_uncharge_page(idx, nr_pages, page, true); | |
390 | } | |
391 | ||
392 | static void __hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, | |
393 | struct hugetlb_cgroup *h_cg, | |
394 | bool rsvd) | |
6d76dcf4 | 395 | { |
6d76dcf4 AK |
396 | if (hugetlb_cgroup_disabled() || !h_cg) |
397 | return; | |
398 | ||
399 | if (huge_page_order(&hstates[idx]) < HUGETLB_CGROUP_MIN_ORDER) | |
400 | return; | |
401 | ||
1adc4d41 MA |
402 | page_counter_uncharge(__hugetlb_cgroup_counter_from_cgroup(h_cg, idx, |
403 | rsvd), | |
404 | nr_pages); | |
405 | ||
406 | if (rsvd) | |
407 | css_put(&h_cg->css); | |
408 | } | |
409 | ||
410 | void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, | |
411 | struct hugetlb_cgroup *h_cg) | |
412 | { | |
413 | __hugetlb_cgroup_uncharge_cgroup(idx, nr_pages, h_cg, false); | |
414 | } | |
415 | ||
416 | void hugetlb_cgroup_uncharge_cgroup_rsvd(int idx, unsigned long nr_pages, | |
417 | struct hugetlb_cgroup *h_cg) | |
418 | { | |
419 | __hugetlb_cgroup_uncharge_cgroup(idx, nr_pages, h_cg, true); | |
420 | } | |
421 | ||
e9fe92ae MA |
422 | void hugetlb_cgroup_uncharge_counter(struct resv_map *resv, unsigned long start, |
423 | unsigned long end) | |
1adc4d41 | 424 | { |
e9fe92ae MA |
425 | if (hugetlb_cgroup_disabled() || !resv || !resv->reservation_counter || |
426 | !resv->css) | |
1adc4d41 MA |
427 | return; |
428 | ||
e9fe92ae MA |
429 | page_counter_uncharge(resv->reservation_counter, |
430 | (end - start) * resv->pages_per_hpage); | |
431 | css_put(resv->css); | |
6d76dcf4 AK |
432 | } |
433 | ||
075a61d0 MA |
434 | void hugetlb_cgroup_uncharge_file_region(struct resv_map *resv, |
435 | struct file_region *rg, | |
d85aecf2 ML |
436 | unsigned long nr_pages, |
437 | bool region_del) | |
075a61d0 MA |
438 | { |
439 | if (hugetlb_cgroup_disabled() || !resv || !rg || !nr_pages) | |
440 | return; | |
441 | ||
862f7f65 | 442 | if (rg->reservation_counter && resv->pages_per_hpage && |
075a61d0 MA |
443 | !resv->reservation_counter) { |
444 | page_counter_uncharge(rg->reservation_counter, | |
445 | nr_pages * resv->pages_per_hpage); | |
d85aecf2 ML |
446 | /* |
447 | * Only do css_put(rg->css) when we delete the entire region | |
448 | * because one file_region must hold exactly one css reference. | |
449 | */ | |
450 | if (region_del) | |
451 | css_put(rg->css); | |
075a61d0 MA |
452 | } |
453 | } | |
454 | ||
71f87bee JW |
455 | enum { |
456 | RES_USAGE, | |
cdc2fcfe | 457 | RES_RSVD_USAGE, |
71f87bee | 458 | RES_LIMIT, |
cdc2fcfe | 459 | RES_RSVD_LIMIT, |
71f87bee | 460 | RES_MAX_USAGE, |
cdc2fcfe | 461 | RES_RSVD_MAX_USAGE, |
71f87bee | 462 | RES_FAILCNT, |
cdc2fcfe | 463 | RES_RSVD_FAILCNT, |
71f87bee JW |
464 | }; |
465 | ||
f4776199 MA |
466 | static int hugetlb_cgroup_read_numa_stat(struct seq_file *seq, void *dummy) |
467 | { | |
468 | int nid; | |
469 | struct cftype *cft = seq_cft(seq); | |
470 | int idx = MEMFILE_IDX(cft->private); | |
471 | bool legacy = MEMFILE_ATTR(cft->private); | |
472 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
473 | struct cgroup_subsys_state *css; | |
474 | unsigned long usage; | |
475 | ||
476 | if (legacy) { | |
477 | /* Add up usage across all nodes for the non-hierarchical total. */ | |
478 | usage = 0; | |
479 | for_each_node_state(nid, N_MEMORY) | |
480 | usage += READ_ONCE(h_cg->nodeinfo[nid]->usage[idx]); | |
481 | seq_printf(seq, "total=%lu", usage * PAGE_SIZE); | |
482 | ||
483 | /* Simply print the per-node usage for the non-hierarchical total. */ | |
484 | for_each_node_state(nid, N_MEMORY) | |
485 | seq_printf(seq, " N%d=%lu", nid, | |
486 | READ_ONCE(h_cg->nodeinfo[nid]->usage[idx]) * | |
487 | PAGE_SIZE); | |
488 | seq_putc(seq, '\n'); | |
489 | } | |
490 | ||
491 | /* | |
492 | * The hierarchical total is pretty much the value recorded by the | |
493 | * counter, so use that. | |
494 | */ | |
495 | seq_printf(seq, "%stotal=%lu", legacy ? "hierarchical_" : "", | |
496 | page_counter_read(&h_cg->hugepage[idx]) * PAGE_SIZE); | |
497 | ||
498 | /* | |
499 | * For each node, transverse the css tree to obtain the hierarchical | |
500 | * node usage. | |
501 | */ | |
502 | for_each_node_state(nid, N_MEMORY) { | |
503 | usage = 0; | |
504 | rcu_read_lock(); | |
505 | css_for_each_descendant_pre(css, &h_cg->css) { | |
506 | usage += READ_ONCE(hugetlb_cgroup_from_css(css) | |
507 | ->nodeinfo[nid] | |
508 | ->usage[idx]); | |
509 | } | |
510 | rcu_read_unlock(); | |
511 | seq_printf(seq, " N%d=%lu", nid, usage * PAGE_SIZE); | |
512 | } | |
513 | ||
514 | seq_putc(seq, '\n'); | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
716f479d TH |
519 | static u64 hugetlb_cgroup_read_u64(struct cgroup_subsys_state *css, |
520 | struct cftype *cft) | |
abb8206c | 521 | { |
71f87bee | 522 | struct page_counter *counter; |
cdc2fcfe | 523 | struct page_counter *rsvd_counter; |
182446d0 | 524 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(css); |
abb8206c | 525 | |
71f87bee | 526 | counter = &h_cg->hugepage[MEMFILE_IDX(cft->private)]; |
cdc2fcfe | 527 | rsvd_counter = &h_cg->rsvd_hugepage[MEMFILE_IDX(cft->private)]; |
abb8206c | 528 | |
71f87bee JW |
529 | switch (MEMFILE_ATTR(cft->private)) { |
530 | case RES_USAGE: | |
531 | return (u64)page_counter_read(counter) * PAGE_SIZE; | |
cdc2fcfe MA |
532 | case RES_RSVD_USAGE: |
533 | return (u64)page_counter_read(rsvd_counter) * PAGE_SIZE; | |
71f87bee | 534 | case RES_LIMIT: |
bbec2e15 | 535 | return (u64)counter->max * PAGE_SIZE; |
cdc2fcfe MA |
536 | case RES_RSVD_LIMIT: |
537 | return (u64)rsvd_counter->max * PAGE_SIZE; | |
71f87bee JW |
538 | case RES_MAX_USAGE: |
539 | return (u64)counter->watermark * PAGE_SIZE; | |
cdc2fcfe MA |
540 | case RES_RSVD_MAX_USAGE: |
541 | return (u64)rsvd_counter->watermark * PAGE_SIZE; | |
71f87bee JW |
542 | case RES_FAILCNT: |
543 | return counter->failcnt; | |
cdc2fcfe MA |
544 | case RES_RSVD_FAILCNT: |
545 | return rsvd_counter->failcnt; | |
71f87bee JW |
546 | default: |
547 | BUG(); | |
548 | } | |
abb8206c AK |
549 | } |
550 | ||
faced7e0 GS |
551 | static int hugetlb_cgroup_read_u64_max(struct seq_file *seq, void *v) |
552 | { | |
553 | int idx; | |
554 | u64 val; | |
555 | struct cftype *cft = seq_cft(seq); | |
556 | unsigned long limit; | |
557 | struct page_counter *counter; | |
558 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
559 | ||
560 | idx = MEMFILE_IDX(cft->private); | |
561 | counter = &h_cg->hugepage[idx]; | |
562 | ||
563 | limit = round_down(PAGE_COUNTER_MAX, | |
8938494c | 564 | pages_per_huge_page(&hstates[idx])); |
faced7e0 GS |
565 | |
566 | switch (MEMFILE_ATTR(cft->private)) { | |
cdc2fcfe MA |
567 | case RES_RSVD_USAGE: |
568 | counter = &h_cg->rsvd_hugepage[idx]; | |
e4a9bc58 | 569 | fallthrough; |
faced7e0 GS |
570 | case RES_USAGE: |
571 | val = (u64)page_counter_read(counter); | |
572 | seq_printf(seq, "%llu\n", val * PAGE_SIZE); | |
573 | break; | |
cdc2fcfe MA |
574 | case RES_RSVD_LIMIT: |
575 | counter = &h_cg->rsvd_hugepage[idx]; | |
e4a9bc58 | 576 | fallthrough; |
faced7e0 GS |
577 | case RES_LIMIT: |
578 | val = (u64)counter->max; | |
579 | if (val == limit) | |
580 | seq_puts(seq, "max\n"); | |
581 | else | |
582 | seq_printf(seq, "%llu\n", val * PAGE_SIZE); | |
583 | break; | |
584 | default: | |
585 | BUG(); | |
586 | } | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
71f87bee JW |
591 | static DEFINE_MUTEX(hugetlb_limit_mutex); |
592 | ||
451af504 | 593 | static ssize_t hugetlb_cgroup_write(struct kernfs_open_file *of, |
faced7e0 GS |
594 | char *buf, size_t nbytes, loff_t off, |
595 | const char *max) | |
abb8206c | 596 | { |
71f87bee JW |
597 | int ret, idx; |
598 | unsigned long nr_pages; | |
451af504 | 599 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(of_css(of)); |
cdc2fcfe | 600 | bool rsvd = false; |
abb8206c | 601 | |
71f87bee JW |
602 | if (hugetlb_cgroup_is_root(h_cg)) /* Can't set limit on root */ |
603 | return -EINVAL; | |
604 | ||
451af504 | 605 | buf = strstrip(buf); |
faced7e0 | 606 | ret = page_counter_memparse(buf, max, &nr_pages); |
71f87bee JW |
607 | if (ret) |
608 | return ret; | |
609 | ||
451af504 | 610 | idx = MEMFILE_IDX(of_cft(of)->private); |
8938494c | 611 | nr_pages = round_down(nr_pages, pages_per_huge_page(&hstates[idx])); |
abb8206c | 612 | |
71f87bee | 613 | switch (MEMFILE_ATTR(of_cft(of)->private)) { |
cdc2fcfe MA |
614 | case RES_RSVD_LIMIT: |
615 | rsvd = true; | |
e4a9bc58 | 616 | fallthrough; |
abb8206c | 617 | case RES_LIMIT: |
71f87bee | 618 | mutex_lock(&hugetlb_limit_mutex); |
cdc2fcfe | 619 | ret = page_counter_set_max( |
1adc4d41 | 620 | __hugetlb_cgroup_counter_from_cgroup(h_cg, idx, rsvd), |
cdc2fcfe | 621 | nr_pages); |
71f87bee | 622 | mutex_unlock(&hugetlb_limit_mutex); |
abb8206c AK |
623 | break; |
624 | default: | |
625 | ret = -EINVAL; | |
626 | break; | |
627 | } | |
451af504 | 628 | return ret ?: nbytes; |
abb8206c AK |
629 | } |
630 | ||
faced7e0 GS |
631 | static ssize_t hugetlb_cgroup_write_legacy(struct kernfs_open_file *of, |
632 | char *buf, size_t nbytes, loff_t off) | |
633 | { | |
634 | return hugetlb_cgroup_write(of, buf, nbytes, off, "-1"); | |
635 | } | |
636 | ||
637 | static ssize_t hugetlb_cgroup_write_dfl(struct kernfs_open_file *of, | |
638 | char *buf, size_t nbytes, loff_t off) | |
639 | { | |
640 | return hugetlb_cgroup_write(of, buf, nbytes, off, "max"); | |
641 | } | |
642 | ||
6770c64e TH |
643 | static ssize_t hugetlb_cgroup_reset(struct kernfs_open_file *of, |
644 | char *buf, size_t nbytes, loff_t off) | |
abb8206c | 645 | { |
71f87bee | 646 | int ret = 0; |
cdc2fcfe | 647 | struct page_counter *counter, *rsvd_counter; |
6770c64e | 648 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(of_css(of)); |
abb8206c | 649 | |
71f87bee | 650 | counter = &h_cg->hugepage[MEMFILE_IDX(of_cft(of)->private)]; |
cdc2fcfe | 651 | rsvd_counter = &h_cg->rsvd_hugepage[MEMFILE_IDX(of_cft(of)->private)]; |
abb8206c | 652 | |
71f87bee | 653 | switch (MEMFILE_ATTR(of_cft(of)->private)) { |
abb8206c | 654 | case RES_MAX_USAGE: |
71f87bee | 655 | page_counter_reset_watermark(counter); |
abb8206c | 656 | break; |
cdc2fcfe MA |
657 | case RES_RSVD_MAX_USAGE: |
658 | page_counter_reset_watermark(rsvd_counter); | |
659 | break; | |
abb8206c | 660 | case RES_FAILCNT: |
71f87bee | 661 | counter->failcnt = 0; |
abb8206c | 662 | break; |
cdc2fcfe MA |
663 | case RES_RSVD_FAILCNT: |
664 | rsvd_counter->failcnt = 0; | |
665 | break; | |
abb8206c AK |
666 | default: |
667 | ret = -EINVAL; | |
668 | break; | |
669 | } | |
6770c64e | 670 | return ret ?: nbytes; |
abb8206c AK |
671 | } |
672 | ||
673 | static char *mem_fmt(char *buf, int size, unsigned long hsize) | |
674 | { | |
abfb09e2 ML |
675 | if (hsize >= SZ_1G) |
676 | snprintf(buf, size, "%luGB", hsize / SZ_1G); | |
677 | else if (hsize >= SZ_1M) | |
678 | snprintf(buf, size, "%luMB", hsize / SZ_1M); | |
abb8206c | 679 | else |
abfb09e2 | 680 | snprintf(buf, size, "%luKB", hsize / SZ_1K); |
abb8206c AK |
681 | return buf; |
682 | } | |
683 | ||
faced7e0 GS |
684 | static int __hugetlb_events_show(struct seq_file *seq, bool local) |
685 | { | |
686 | int idx; | |
687 | long max; | |
688 | struct cftype *cft = seq_cft(seq); | |
689 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
690 | ||
691 | idx = MEMFILE_IDX(cft->private); | |
692 | ||
693 | if (local) | |
694 | max = atomic_long_read(&h_cg->events_local[idx][HUGETLB_MAX]); | |
695 | else | |
696 | max = atomic_long_read(&h_cg->events[idx][HUGETLB_MAX]); | |
697 | ||
698 | seq_printf(seq, "max %lu\n", max); | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
703 | static int hugetlb_events_show(struct seq_file *seq, void *v) | |
704 | { | |
705 | return __hugetlb_events_show(seq, false); | |
706 | } | |
707 | ||
708 | static int hugetlb_events_local_show(struct seq_file *seq, void *v) | |
709 | { | |
710 | return __hugetlb_events_show(seq, true); | |
711 | } | |
712 | ||
713 | static void __init __hugetlb_cgroup_file_dfl_init(int idx) | |
abb8206c AK |
714 | { |
715 | char buf[32]; | |
716 | struct cftype *cft; | |
717 | struct hstate *h = &hstates[idx]; | |
718 | ||
719 | /* format the size */ | |
cdc2fcfe | 720 | mem_fmt(buf, sizeof(buf), huge_page_size(h)); |
abb8206c AK |
721 | |
722 | /* Add the limit file */ | |
faced7e0 GS |
723 | cft = &h->cgroup_files_dfl[0]; |
724 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max", buf); | |
725 | cft->private = MEMFILE_PRIVATE(idx, RES_LIMIT); | |
726 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
727 | cft->write = hugetlb_cgroup_write_dfl; | |
728 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
729 | ||
cdc2fcfe | 730 | /* Add the reservation limit file */ |
faced7e0 | 731 | cft = &h->cgroup_files_dfl[1]; |
cdc2fcfe MA |
732 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.max", buf); |
733 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_LIMIT); | |
734 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
735 | cft->write = hugetlb_cgroup_write_dfl; | |
736 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
737 | ||
738 | /* Add the current usage file */ | |
739 | cft = &h->cgroup_files_dfl[2]; | |
faced7e0 GS |
740 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.current", buf); |
741 | cft->private = MEMFILE_PRIVATE(idx, RES_USAGE); | |
742 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
743 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
744 | ||
cdc2fcfe MA |
745 | /* Add the current reservation usage file */ |
746 | cft = &h->cgroup_files_dfl[3]; | |
747 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.current", buf); | |
748 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_USAGE); | |
749 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
750 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
751 | ||
faced7e0 | 752 | /* Add the events file */ |
cdc2fcfe | 753 | cft = &h->cgroup_files_dfl[4]; |
faced7e0 GS |
754 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events", buf); |
755 | cft->private = MEMFILE_PRIVATE(idx, 0); | |
756 | cft->seq_show = hugetlb_events_show; | |
d5a16959 | 757 | cft->file_offset = offsetof(struct hugetlb_cgroup, events_file[idx]); |
faced7e0 GS |
758 | cft->flags = CFTYPE_NOT_ON_ROOT; |
759 | ||
760 | /* Add the events.local file */ | |
cdc2fcfe | 761 | cft = &h->cgroup_files_dfl[5]; |
faced7e0 GS |
762 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events.local", buf); |
763 | cft->private = MEMFILE_PRIVATE(idx, 0); | |
764 | cft->seq_show = hugetlb_events_local_show; | |
765 | cft->file_offset = offsetof(struct hugetlb_cgroup, | |
d5a16959 | 766 | events_local_file[idx]); |
faced7e0 GS |
767 | cft->flags = CFTYPE_NOT_ON_ROOT; |
768 | ||
f4776199 | 769 | /* Add the numa stat file */ |
cdc2fcfe | 770 | cft = &h->cgroup_files_dfl[6]; |
f4776199 | 771 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf); |
2727cfe4 | 772 | cft->private = MEMFILE_PRIVATE(idx, 0); |
f4776199 MA |
773 | cft->seq_show = hugetlb_cgroup_read_numa_stat; |
774 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
775 | ||
776 | /* NULL terminate the last cft */ | |
777 | cft = &h->cgroup_files_dfl[7]; | |
faced7e0 GS |
778 | memset(cft, 0, sizeof(*cft)); |
779 | ||
780 | WARN_ON(cgroup_add_dfl_cftypes(&hugetlb_cgrp_subsys, | |
781 | h->cgroup_files_dfl)); | |
782 | } | |
783 | ||
784 | static void __init __hugetlb_cgroup_file_legacy_init(int idx) | |
785 | { | |
786 | char buf[32]; | |
787 | struct cftype *cft; | |
788 | struct hstate *h = &hstates[idx]; | |
789 | ||
790 | /* format the size */ | |
cdc2fcfe | 791 | mem_fmt(buf, sizeof(buf), huge_page_size(h)); |
faced7e0 GS |
792 | |
793 | /* Add the limit file */ | |
794 | cft = &h->cgroup_files_legacy[0]; | |
abb8206c AK |
795 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.limit_in_bytes", buf); |
796 | cft->private = MEMFILE_PRIVATE(idx, RES_LIMIT); | |
716f479d | 797 | cft->read_u64 = hugetlb_cgroup_read_u64; |
faced7e0 | 798 | cft->write = hugetlb_cgroup_write_legacy; |
abb8206c | 799 | |
cdc2fcfe | 800 | /* Add the reservation limit file */ |
faced7e0 | 801 | cft = &h->cgroup_files_legacy[1]; |
cdc2fcfe MA |
802 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.limit_in_bytes", buf); |
803 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_LIMIT); | |
804 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
805 | cft->write = hugetlb_cgroup_write_legacy; | |
806 | ||
807 | /* Add the usage file */ | |
808 | cft = &h->cgroup_files_legacy[2]; | |
abb8206c AK |
809 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.usage_in_bytes", buf); |
810 | cft->private = MEMFILE_PRIVATE(idx, RES_USAGE); | |
716f479d | 811 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 812 | |
cdc2fcfe MA |
813 | /* Add the reservation usage file */ |
814 | cft = &h->cgroup_files_legacy[3]; | |
815 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.usage_in_bytes", buf); | |
816 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_USAGE); | |
817 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
818 | ||
abb8206c | 819 | /* Add the MAX usage file */ |
cdc2fcfe | 820 | cft = &h->cgroup_files_legacy[4]; |
abb8206c AK |
821 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max_usage_in_bytes", buf); |
822 | cft->private = MEMFILE_PRIVATE(idx, RES_MAX_USAGE); | |
6770c64e | 823 | cft->write = hugetlb_cgroup_reset; |
716f479d | 824 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 825 | |
cdc2fcfe MA |
826 | /* Add the MAX reservation usage file */ |
827 | cft = &h->cgroup_files_legacy[5]; | |
828 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.max_usage_in_bytes", buf); | |
829 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_MAX_USAGE); | |
830 | cft->write = hugetlb_cgroup_reset; | |
831 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
832 | ||
abb8206c | 833 | /* Add the failcntfile */ |
cdc2fcfe | 834 | cft = &h->cgroup_files_legacy[6]; |
abb8206c | 835 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.failcnt", buf); |
cdc2fcfe MA |
836 | cft->private = MEMFILE_PRIVATE(idx, RES_FAILCNT); |
837 | cft->write = hugetlb_cgroup_reset; | |
838 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
839 | ||
840 | /* Add the reservation failcntfile */ | |
841 | cft = &h->cgroup_files_legacy[7]; | |
842 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.failcnt", buf); | |
843 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_FAILCNT); | |
6770c64e | 844 | cft->write = hugetlb_cgroup_reset; |
716f479d | 845 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 846 | |
f4776199 | 847 | /* Add the numa stat file */ |
cdc2fcfe | 848 | cft = &h->cgroup_files_legacy[8]; |
f4776199 MA |
849 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf); |
850 | cft->private = MEMFILE_PRIVATE(idx, 1); | |
851 | cft->seq_show = hugetlb_cgroup_read_numa_stat; | |
852 | ||
853 | /* NULL terminate the last cft */ | |
854 | cft = &h->cgroup_files_legacy[9]; | |
abb8206c AK |
855 | memset(cft, 0, sizeof(*cft)); |
856 | ||
2cf669a5 | 857 | WARN_ON(cgroup_add_legacy_cftypes(&hugetlb_cgrp_subsys, |
faced7e0 GS |
858 | h->cgroup_files_legacy)); |
859 | } | |
860 | ||
861 | static void __init __hugetlb_cgroup_file_init(int idx) | |
862 | { | |
863 | __hugetlb_cgroup_file_dfl_init(idx); | |
864 | __hugetlb_cgroup_file_legacy_init(idx); | |
7179e7bf JW |
865 | } |
866 | ||
867 | void __init hugetlb_cgroup_file_init(void) | |
868 | { | |
869 | struct hstate *h; | |
870 | ||
871 | for_each_hstate(h) { | |
872 | /* | |
873 | * Add cgroup control files only if the huge page consists | |
874 | * of more than two normal pages. This is because we use | |
1d798ca3 | 875 | * page[2].private for storing cgroup details. |
7179e7bf JW |
876 | */ |
877 | if (huge_page_order(h) >= HUGETLB_CGROUP_MIN_ORDER) | |
878 | __hugetlb_cgroup_file_init(hstate_index(h)); | |
879 | } | |
abb8206c AK |
880 | } |
881 | ||
75754681 AK |
882 | /* |
883 | * hugetlb_lock will make sure a parallel cgroup rmdir won't happen | |
884 | * when we migrate hugepages | |
885 | */ | |
8e6ac7fa AK |
886 | void hugetlb_cgroup_migrate(struct page *oldhpage, struct page *newhpage) |
887 | { | |
888 | struct hugetlb_cgroup *h_cg; | |
1adc4d41 | 889 | struct hugetlb_cgroup *h_cg_rsvd; |
94ae8ba7 | 890 | struct hstate *h = page_hstate(oldhpage); |
8e6ac7fa AK |
891 | |
892 | if (hugetlb_cgroup_disabled()) | |
893 | return; | |
894 | ||
db71ef79 | 895 | spin_lock_irq(&hugetlb_lock); |
8e6ac7fa | 896 | h_cg = hugetlb_cgroup_from_page(oldhpage); |
1adc4d41 | 897 | h_cg_rsvd = hugetlb_cgroup_from_page_rsvd(oldhpage); |
8e6ac7fa | 898 | set_hugetlb_cgroup(oldhpage, NULL); |
9808895e | 899 | set_hugetlb_cgroup_rsvd(oldhpage, NULL); |
8e6ac7fa AK |
900 | |
901 | /* move the h_cg details to new cgroup */ | |
9808895e | 902 | set_hugetlb_cgroup(newhpage, h_cg); |
1adc4d41 | 903 | set_hugetlb_cgroup_rsvd(newhpage, h_cg_rsvd); |
94ae8ba7 | 904 | list_move(&newhpage->lru, &h->hugepage_activelist); |
db71ef79 | 905 | spin_unlock_irq(&hugetlb_lock); |
8e6ac7fa AK |
906 | return; |
907 | } | |
908 | ||
faced7e0 GS |
909 | static struct cftype hugetlb_files[] = { |
910 | {} /* terminate */ | |
911 | }; | |
912 | ||
073219e9 | 913 | struct cgroup_subsys hugetlb_cgrp_subsys = { |
92fb9748 TH |
914 | .css_alloc = hugetlb_cgroup_css_alloc, |
915 | .css_offline = hugetlb_cgroup_css_offline, | |
916 | .css_free = hugetlb_cgroup_css_free, | |
faced7e0 GS |
917 | .dfl_cftypes = hugetlb_files, |
918 | .legacy_cftypes = hugetlb_files, | |
2bc64a20 | 919 | }; |