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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); |
f074732d | 194 | struct folio *folio = page_folio(page); |
da1def55 | 195 | |
f074732d | 196 | page_hcg = hugetlb_cgroup_from_folio(folio); |
da1def55 AK |
197 | /* |
198 | * We can have pages in active list without any cgroup | |
199 | * ie, hugepage with less than 3 pages. We can safely | |
200 | * ignore those pages. | |
201 | */ | |
202 | if (!page_hcg || page_hcg != h_cg) | |
203 | goto out; | |
204 | ||
d8c6546b | 205 | nr_pages = compound_nr(page); |
da1def55 AK |
206 | if (!parent) { |
207 | parent = root_h_cgroup; | |
208 | /* root has no limit */ | |
71f87bee | 209 | page_counter_charge(&parent->hugepage[idx], nr_pages); |
da1def55 AK |
210 | } |
211 | counter = &h_cg->hugepage[idx]; | |
71f87bee JW |
212 | /* Take the pages off the local counter */ |
213 | page_counter_cancel(counter, nr_pages); | |
da1def55 | 214 | |
de656ed3 | 215 | set_hugetlb_cgroup(folio, parent); |
da1def55 AK |
216 | out: |
217 | return; | |
218 | } | |
219 | ||
220 | /* | |
221 | * Force the hugetlb cgroup to empty the hugetlb resources by moving them to | |
222 | * the parent cgroup. | |
223 | */ | |
eb95419b | 224 | static void hugetlb_cgroup_css_offline(struct cgroup_subsys_state *css) |
2bc64a20 | 225 | { |
eb95419b | 226 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(css); |
da1def55 AK |
227 | struct hstate *h; |
228 | struct page *page; | |
da1def55 AK |
229 | |
230 | do { | |
da1def55 | 231 | for_each_hstate(h) { |
db71ef79 | 232 | spin_lock_irq(&hugetlb_lock); |
da1def55 | 233 | list_for_each_entry(page, &h->hugepage_activelist, lru) |
c37213c5 | 234 | hugetlb_cgroup_move_parent(hstate_index(h), h_cg, page); |
da1def55 | 235 | |
db71ef79 | 236 | spin_unlock_irq(&hugetlb_lock); |
da1def55 AK |
237 | } |
238 | cond_resched(); | |
3f798518 | 239 | } while (hugetlb_cgroup_have_usage(h_cg)); |
2bc64a20 AK |
240 | } |
241 | ||
faced7e0 GS |
242 | static inline void hugetlb_event(struct hugetlb_cgroup *hugetlb, int idx, |
243 | enum hugetlb_memory_event event) | |
244 | { | |
245 | atomic_long_inc(&hugetlb->events_local[idx][event]); | |
246 | cgroup_file_notify(&hugetlb->events_local_file[idx]); | |
247 | ||
248 | do { | |
249 | atomic_long_inc(&hugetlb->events[idx][event]); | |
250 | cgroup_file_notify(&hugetlb->events_file[idx]); | |
251 | } while ((hugetlb = parent_hugetlb_cgroup(hugetlb)) && | |
252 | !hugetlb_cgroup_is_root(hugetlb)); | |
253 | } | |
254 | ||
1adc4d41 MA |
255 | static int __hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages, |
256 | struct hugetlb_cgroup **ptr, | |
257 | bool rsvd) | |
6d76dcf4 AK |
258 | { |
259 | int ret = 0; | |
71f87bee | 260 | struct page_counter *counter; |
6d76dcf4 | 261 | struct hugetlb_cgroup *h_cg = NULL; |
6d76dcf4 AK |
262 | |
263 | if (hugetlb_cgroup_disabled()) | |
264 | goto done; | |
6d76dcf4 AK |
265 | again: |
266 | rcu_read_lock(); | |
267 | h_cg = hugetlb_cgroup_from_task(current); | |
0362f326 | 268 | if (!css_tryget(&h_cg->css)) { |
6d76dcf4 AK |
269 | rcu_read_unlock(); |
270 | goto again; | |
271 | } | |
272 | rcu_read_unlock(); | |
273 | ||
1adc4d41 MA |
274 | if (!page_counter_try_charge( |
275 | __hugetlb_cgroup_counter_from_cgroup(h_cg, idx, rsvd), | |
276 | nr_pages, &counter)) { | |
6071ca52 | 277 | ret = -ENOMEM; |
726b7bbe | 278 | hugetlb_event(h_cg, idx, HUGETLB_MAX); |
1adc4d41 MA |
279 | css_put(&h_cg->css); |
280 | goto done; | |
faced7e0 | 281 | } |
1adc4d41 MA |
282 | /* Reservations take a reference to the css because they do not get |
283 | * reparented. | |
284 | */ | |
285 | if (!rsvd) | |
286 | css_put(&h_cg->css); | |
6d76dcf4 AK |
287 | done: |
288 | *ptr = h_cg; | |
289 | return ret; | |
290 | } | |
291 | ||
1adc4d41 MA |
292 | int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages, |
293 | struct hugetlb_cgroup **ptr) | |
294 | { | |
295 | return __hugetlb_cgroup_charge_cgroup(idx, nr_pages, ptr, false); | |
296 | } | |
297 | ||
298 | int hugetlb_cgroup_charge_cgroup_rsvd(int idx, unsigned long nr_pages, | |
299 | struct hugetlb_cgroup **ptr) | |
300 | { | |
301 | return __hugetlb_cgroup_charge_cgroup(idx, nr_pages, ptr, true); | |
302 | } | |
303 | ||
94ae8ba7 | 304 | /* Should be called with hugetlb_lock held */ |
1adc4d41 MA |
305 | static void __hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages, |
306 | struct hugetlb_cgroup *h_cg, | |
541b7c7b | 307 | struct folio *folio, bool rsvd) |
6d76dcf4 AK |
308 | { |
309 | if (hugetlb_cgroup_disabled() || !h_cg) | |
310 | return; | |
311 | ||
541b7c7b | 312 | __set_hugetlb_cgroup(folio, h_cg, rsvd); |
f4776199 MA |
313 | if (!rsvd) { |
314 | unsigned long usage = | |
541b7c7b | 315 | h_cg->nodeinfo[folio_nid(folio)]->usage[idx]; |
f4776199 MA |
316 | /* |
317 | * This write is not atomic due to fetching usage and writing | |
318 | * to it, but that's fine because we call this with | |
319 | * hugetlb_lock held anyway. | |
320 | */ | |
541b7c7b | 321 | WRITE_ONCE(h_cg->nodeinfo[folio_nid(folio)]->usage[idx], |
f4776199 MA |
322 | usage + nr_pages); |
323 | } | |
6d76dcf4 AK |
324 | } |
325 | ||
1adc4d41 MA |
326 | void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages, |
327 | struct hugetlb_cgroup *h_cg, | |
ff7d853b | 328 | struct folio *folio) |
1adc4d41 | 329 | { |
541b7c7b | 330 | __hugetlb_cgroup_commit_charge(idx, nr_pages, h_cg, folio, false); |
1adc4d41 MA |
331 | } |
332 | ||
333 | void hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages, | |
334 | struct hugetlb_cgroup *h_cg, | |
ff7d853b | 335 | struct folio *folio) |
1adc4d41 | 336 | { |
541b7c7b | 337 | __hugetlb_cgroup_commit_charge(idx, nr_pages, h_cg, folio, true); |
1adc4d41 MA |
338 | } |
339 | ||
6d76dcf4 AK |
340 | /* |
341 | * Should be called with hugetlb_lock held | |
342 | */ | |
d4ab0316 SK |
343 | static void __hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages, |
344 | struct folio *folio, bool rsvd) | |
6d76dcf4 AK |
345 | { |
346 | struct hugetlb_cgroup *h_cg; | |
6d76dcf4 AK |
347 | |
348 | if (hugetlb_cgroup_disabled()) | |
349 | return; | |
7ea8574e | 350 | lockdep_assert_held(&hugetlb_lock); |
f074732d | 351 | h_cg = __hugetlb_cgroup_from_folio(folio, rsvd); |
6d76dcf4 AK |
352 | if (unlikely(!h_cg)) |
353 | return; | |
f074732d | 354 | __set_hugetlb_cgroup(folio, NULL, rsvd); |
1adc4d41 MA |
355 | |
356 | page_counter_uncharge(__hugetlb_cgroup_counter_from_cgroup(h_cg, idx, | |
357 | rsvd), | |
358 | nr_pages); | |
359 | ||
360 | if (rsvd) | |
361 | css_put(&h_cg->css); | |
f4776199 MA |
362 | else { |
363 | unsigned long usage = | |
d4ab0316 | 364 | h_cg->nodeinfo[folio_nid(folio)]->usage[idx]; |
f4776199 MA |
365 | /* |
366 | * This write is not atomic due to fetching usage and writing | |
367 | * to it, but that's fine because we call this with | |
368 | * hugetlb_lock held anyway. | |
369 | */ | |
d4ab0316 | 370 | WRITE_ONCE(h_cg->nodeinfo[folio_nid(folio)]->usage[idx], |
f4776199 MA |
371 | usage - nr_pages); |
372 | } | |
6d76dcf4 AK |
373 | } |
374 | ||
d4ab0316 SK |
375 | void hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages, |
376 | struct folio *folio) | |
1adc4d41 | 377 | { |
d4ab0316 | 378 | __hugetlb_cgroup_uncharge_folio(idx, nr_pages, folio, false); |
1adc4d41 MA |
379 | } |
380 | ||
d4ab0316 SK |
381 | void hugetlb_cgroup_uncharge_folio_rsvd(int idx, unsigned long nr_pages, |
382 | struct folio *folio) | |
1adc4d41 | 383 | { |
d4ab0316 | 384 | __hugetlb_cgroup_uncharge_folio(idx, nr_pages, folio, true); |
1adc4d41 MA |
385 | } |
386 | ||
387 | static void __hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, | |
388 | struct hugetlb_cgroup *h_cg, | |
389 | bool rsvd) | |
6d76dcf4 | 390 | { |
6d76dcf4 AK |
391 | if (hugetlb_cgroup_disabled() || !h_cg) |
392 | return; | |
393 | ||
1adc4d41 MA |
394 | page_counter_uncharge(__hugetlb_cgroup_counter_from_cgroup(h_cg, idx, |
395 | rsvd), | |
396 | nr_pages); | |
397 | ||
398 | if (rsvd) | |
399 | css_put(&h_cg->css); | |
400 | } | |
401 | ||
402 | void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, | |
403 | struct hugetlb_cgroup *h_cg) | |
404 | { | |
405 | __hugetlb_cgroup_uncharge_cgroup(idx, nr_pages, h_cg, false); | |
406 | } | |
407 | ||
408 | void hugetlb_cgroup_uncharge_cgroup_rsvd(int idx, unsigned long nr_pages, | |
409 | struct hugetlb_cgroup *h_cg) | |
410 | { | |
411 | __hugetlb_cgroup_uncharge_cgroup(idx, nr_pages, h_cg, true); | |
412 | } | |
413 | ||
e9fe92ae MA |
414 | void hugetlb_cgroup_uncharge_counter(struct resv_map *resv, unsigned long start, |
415 | unsigned long end) | |
1adc4d41 | 416 | { |
e9fe92ae MA |
417 | if (hugetlb_cgroup_disabled() || !resv || !resv->reservation_counter || |
418 | !resv->css) | |
1adc4d41 MA |
419 | return; |
420 | ||
e9fe92ae MA |
421 | page_counter_uncharge(resv->reservation_counter, |
422 | (end - start) * resv->pages_per_hpage); | |
423 | css_put(resv->css); | |
6d76dcf4 AK |
424 | } |
425 | ||
075a61d0 MA |
426 | void hugetlb_cgroup_uncharge_file_region(struct resv_map *resv, |
427 | struct file_region *rg, | |
d85aecf2 ML |
428 | unsigned long nr_pages, |
429 | bool region_del) | |
075a61d0 MA |
430 | { |
431 | if (hugetlb_cgroup_disabled() || !resv || !rg || !nr_pages) | |
432 | return; | |
433 | ||
862f7f65 | 434 | if (rg->reservation_counter && resv->pages_per_hpage && |
075a61d0 MA |
435 | !resv->reservation_counter) { |
436 | page_counter_uncharge(rg->reservation_counter, | |
437 | nr_pages * resv->pages_per_hpage); | |
d85aecf2 ML |
438 | /* |
439 | * Only do css_put(rg->css) when we delete the entire region | |
440 | * because one file_region must hold exactly one css reference. | |
441 | */ | |
442 | if (region_del) | |
443 | css_put(rg->css); | |
075a61d0 MA |
444 | } |
445 | } | |
446 | ||
71f87bee JW |
447 | enum { |
448 | RES_USAGE, | |
cdc2fcfe | 449 | RES_RSVD_USAGE, |
71f87bee | 450 | RES_LIMIT, |
cdc2fcfe | 451 | RES_RSVD_LIMIT, |
71f87bee | 452 | RES_MAX_USAGE, |
cdc2fcfe | 453 | RES_RSVD_MAX_USAGE, |
71f87bee | 454 | RES_FAILCNT, |
cdc2fcfe | 455 | RES_RSVD_FAILCNT, |
71f87bee JW |
456 | }; |
457 | ||
f4776199 MA |
458 | static int hugetlb_cgroup_read_numa_stat(struct seq_file *seq, void *dummy) |
459 | { | |
460 | int nid; | |
461 | struct cftype *cft = seq_cft(seq); | |
462 | int idx = MEMFILE_IDX(cft->private); | |
463 | bool legacy = MEMFILE_ATTR(cft->private); | |
464 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
465 | struct cgroup_subsys_state *css; | |
466 | unsigned long usage; | |
467 | ||
468 | if (legacy) { | |
469 | /* Add up usage across all nodes for the non-hierarchical total. */ | |
470 | usage = 0; | |
471 | for_each_node_state(nid, N_MEMORY) | |
472 | usage += READ_ONCE(h_cg->nodeinfo[nid]->usage[idx]); | |
473 | seq_printf(seq, "total=%lu", usage * PAGE_SIZE); | |
474 | ||
475 | /* Simply print the per-node usage for the non-hierarchical total. */ | |
476 | for_each_node_state(nid, N_MEMORY) | |
477 | seq_printf(seq, " N%d=%lu", nid, | |
478 | READ_ONCE(h_cg->nodeinfo[nid]->usage[idx]) * | |
479 | PAGE_SIZE); | |
480 | seq_putc(seq, '\n'); | |
481 | } | |
482 | ||
483 | /* | |
484 | * The hierarchical total is pretty much the value recorded by the | |
485 | * counter, so use that. | |
486 | */ | |
487 | seq_printf(seq, "%stotal=%lu", legacy ? "hierarchical_" : "", | |
488 | page_counter_read(&h_cg->hugepage[idx]) * PAGE_SIZE); | |
489 | ||
490 | /* | |
491 | * For each node, transverse the css tree to obtain the hierarchical | |
492 | * node usage. | |
493 | */ | |
494 | for_each_node_state(nid, N_MEMORY) { | |
495 | usage = 0; | |
496 | rcu_read_lock(); | |
497 | css_for_each_descendant_pre(css, &h_cg->css) { | |
498 | usage += READ_ONCE(hugetlb_cgroup_from_css(css) | |
499 | ->nodeinfo[nid] | |
500 | ->usage[idx]); | |
501 | } | |
502 | rcu_read_unlock(); | |
503 | seq_printf(seq, " N%d=%lu", nid, usage * PAGE_SIZE); | |
504 | } | |
505 | ||
506 | seq_putc(seq, '\n'); | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
716f479d TH |
511 | static u64 hugetlb_cgroup_read_u64(struct cgroup_subsys_state *css, |
512 | struct cftype *cft) | |
abb8206c | 513 | { |
71f87bee | 514 | struct page_counter *counter; |
cdc2fcfe | 515 | struct page_counter *rsvd_counter; |
182446d0 | 516 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(css); |
abb8206c | 517 | |
71f87bee | 518 | counter = &h_cg->hugepage[MEMFILE_IDX(cft->private)]; |
cdc2fcfe | 519 | rsvd_counter = &h_cg->rsvd_hugepage[MEMFILE_IDX(cft->private)]; |
abb8206c | 520 | |
71f87bee JW |
521 | switch (MEMFILE_ATTR(cft->private)) { |
522 | case RES_USAGE: | |
523 | return (u64)page_counter_read(counter) * PAGE_SIZE; | |
cdc2fcfe MA |
524 | case RES_RSVD_USAGE: |
525 | return (u64)page_counter_read(rsvd_counter) * PAGE_SIZE; | |
71f87bee | 526 | case RES_LIMIT: |
bbec2e15 | 527 | return (u64)counter->max * PAGE_SIZE; |
cdc2fcfe MA |
528 | case RES_RSVD_LIMIT: |
529 | return (u64)rsvd_counter->max * PAGE_SIZE; | |
71f87bee JW |
530 | case RES_MAX_USAGE: |
531 | return (u64)counter->watermark * PAGE_SIZE; | |
cdc2fcfe MA |
532 | case RES_RSVD_MAX_USAGE: |
533 | return (u64)rsvd_counter->watermark * PAGE_SIZE; | |
71f87bee JW |
534 | case RES_FAILCNT: |
535 | return counter->failcnt; | |
cdc2fcfe MA |
536 | case RES_RSVD_FAILCNT: |
537 | return rsvd_counter->failcnt; | |
71f87bee JW |
538 | default: |
539 | BUG(); | |
540 | } | |
abb8206c AK |
541 | } |
542 | ||
faced7e0 GS |
543 | static int hugetlb_cgroup_read_u64_max(struct seq_file *seq, void *v) |
544 | { | |
545 | int idx; | |
546 | u64 val; | |
547 | struct cftype *cft = seq_cft(seq); | |
548 | unsigned long limit; | |
549 | struct page_counter *counter; | |
550 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
551 | ||
552 | idx = MEMFILE_IDX(cft->private); | |
553 | counter = &h_cg->hugepage[idx]; | |
554 | ||
555 | limit = round_down(PAGE_COUNTER_MAX, | |
8938494c | 556 | pages_per_huge_page(&hstates[idx])); |
faced7e0 GS |
557 | |
558 | switch (MEMFILE_ATTR(cft->private)) { | |
cdc2fcfe MA |
559 | case RES_RSVD_USAGE: |
560 | counter = &h_cg->rsvd_hugepage[idx]; | |
e4a9bc58 | 561 | fallthrough; |
faced7e0 GS |
562 | case RES_USAGE: |
563 | val = (u64)page_counter_read(counter); | |
564 | seq_printf(seq, "%llu\n", val * PAGE_SIZE); | |
565 | break; | |
cdc2fcfe MA |
566 | case RES_RSVD_LIMIT: |
567 | counter = &h_cg->rsvd_hugepage[idx]; | |
e4a9bc58 | 568 | fallthrough; |
faced7e0 GS |
569 | case RES_LIMIT: |
570 | val = (u64)counter->max; | |
571 | if (val == limit) | |
572 | seq_puts(seq, "max\n"); | |
573 | else | |
574 | seq_printf(seq, "%llu\n", val * PAGE_SIZE); | |
575 | break; | |
576 | default: | |
577 | BUG(); | |
578 | } | |
579 | ||
580 | return 0; | |
581 | } | |
582 | ||
71f87bee JW |
583 | static DEFINE_MUTEX(hugetlb_limit_mutex); |
584 | ||
451af504 | 585 | static ssize_t hugetlb_cgroup_write(struct kernfs_open_file *of, |
faced7e0 GS |
586 | char *buf, size_t nbytes, loff_t off, |
587 | const char *max) | |
abb8206c | 588 | { |
71f87bee JW |
589 | int ret, idx; |
590 | unsigned long nr_pages; | |
451af504 | 591 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(of_css(of)); |
cdc2fcfe | 592 | bool rsvd = false; |
abb8206c | 593 | |
71f87bee JW |
594 | if (hugetlb_cgroup_is_root(h_cg)) /* Can't set limit on root */ |
595 | return -EINVAL; | |
596 | ||
451af504 | 597 | buf = strstrip(buf); |
faced7e0 | 598 | ret = page_counter_memparse(buf, max, &nr_pages); |
71f87bee JW |
599 | if (ret) |
600 | return ret; | |
601 | ||
451af504 | 602 | idx = MEMFILE_IDX(of_cft(of)->private); |
8938494c | 603 | nr_pages = round_down(nr_pages, pages_per_huge_page(&hstates[idx])); |
abb8206c | 604 | |
71f87bee | 605 | switch (MEMFILE_ATTR(of_cft(of)->private)) { |
cdc2fcfe MA |
606 | case RES_RSVD_LIMIT: |
607 | rsvd = true; | |
e4a9bc58 | 608 | fallthrough; |
abb8206c | 609 | case RES_LIMIT: |
71f87bee | 610 | mutex_lock(&hugetlb_limit_mutex); |
cdc2fcfe | 611 | ret = page_counter_set_max( |
1adc4d41 | 612 | __hugetlb_cgroup_counter_from_cgroup(h_cg, idx, rsvd), |
cdc2fcfe | 613 | nr_pages); |
71f87bee | 614 | mutex_unlock(&hugetlb_limit_mutex); |
abb8206c AK |
615 | break; |
616 | default: | |
617 | ret = -EINVAL; | |
618 | break; | |
619 | } | |
451af504 | 620 | return ret ?: nbytes; |
abb8206c AK |
621 | } |
622 | ||
faced7e0 GS |
623 | static ssize_t hugetlb_cgroup_write_legacy(struct kernfs_open_file *of, |
624 | char *buf, size_t nbytes, loff_t off) | |
625 | { | |
626 | return hugetlb_cgroup_write(of, buf, nbytes, off, "-1"); | |
627 | } | |
628 | ||
629 | static ssize_t hugetlb_cgroup_write_dfl(struct kernfs_open_file *of, | |
630 | char *buf, size_t nbytes, loff_t off) | |
631 | { | |
632 | return hugetlb_cgroup_write(of, buf, nbytes, off, "max"); | |
633 | } | |
634 | ||
6770c64e TH |
635 | static ssize_t hugetlb_cgroup_reset(struct kernfs_open_file *of, |
636 | char *buf, size_t nbytes, loff_t off) | |
abb8206c | 637 | { |
71f87bee | 638 | int ret = 0; |
cdc2fcfe | 639 | struct page_counter *counter, *rsvd_counter; |
6770c64e | 640 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(of_css(of)); |
abb8206c | 641 | |
71f87bee | 642 | counter = &h_cg->hugepage[MEMFILE_IDX(of_cft(of)->private)]; |
cdc2fcfe | 643 | rsvd_counter = &h_cg->rsvd_hugepage[MEMFILE_IDX(of_cft(of)->private)]; |
abb8206c | 644 | |
71f87bee | 645 | switch (MEMFILE_ATTR(of_cft(of)->private)) { |
abb8206c | 646 | case RES_MAX_USAGE: |
71f87bee | 647 | page_counter_reset_watermark(counter); |
abb8206c | 648 | break; |
cdc2fcfe MA |
649 | case RES_RSVD_MAX_USAGE: |
650 | page_counter_reset_watermark(rsvd_counter); | |
651 | break; | |
abb8206c | 652 | case RES_FAILCNT: |
71f87bee | 653 | counter->failcnt = 0; |
abb8206c | 654 | break; |
cdc2fcfe MA |
655 | case RES_RSVD_FAILCNT: |
656 | rsvd_counter->failcnt = 0; | |
657 | break; | |
abb8206c AK |
658 | default: |
659 | ret = -EINVAL; | |
660 | break; | |
661 | } | |
6770c64e | 662 | return ret ?: nbytes; |
abb8206c AK |
663 | } |
664 | ||
665 | static char *mem_fmt(char *buf, int size, unsigned long hsize) | |
666 | { | |
abfb09e2 ML |
667 | if (hsize >= SZ_1G) |
668 | snprintf(buf, size, "%luGB", hsize / SZ_1G); | |
669 | else if (hsize >= SZ_1M) | |
670 | snprintf(buf, size, "%luMB", hsize / SZ_1M); | |
abb8206c | 671 | else |
abfb09e2 | 672 | snprintf(buf, size, "%luKB", hsize / SZ_1K); |
abb8206c AK |
673 | return buf; |
674 | } | |
675 | ||
faced7e0 GS |
676 | static int __hugetlb_events_show(struct seq_file *seq, bool local) |
677 | { | |
678 | int idx; | |
679 | long max; | |
680 | struct cftype *cft = seq_cft(seq); | |
681 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
682 | ||
683 | idx = MEMFILE_IDX(cft->private); | |
684 | ||
685 | if (local) | |
686 | max = atomic_long_read(&h_cg->events_local[idx][HUGETLB_MAX]); | |
687 | else | |
688 | max = atomic_long_read(&h_cg->events[idx][HUGETLB_MAX]); | |
689 | ||
690 | seq_printf(seq, "max %lu\n", max); | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
695 | static int hugetlb_events_show(struct seq_file *seq, void *v) | |
696 | { | |
697 | return __hugetlb_events_show(seq, false); | |
698 | } | |
699 | ||
700 | static int hugetlb_events_local_show(struct seq_file *seq, void *v) | |
701 | { | |
702 | return __hugetlb_events_show(seq, true); | |
703 | } | |
704 | ||
705 | static void __init __hugetlb_cgroup_file_dfl_init(int idx) | |
abb8206c AK |
706 | { |
707 | char buf[32]; | |
708 | struct cftype *cft; | |
709 | struct hstate *h = &hstates[idx]; | |
710 | ||
711 | /* format the size */ | |
cdc2fcfe | 712 | mem_fmt(buf, sizeof(buf), huge_page_size(h)); |
abb8206c AK |
713 | |
714 | /* Add the limit file */ | |
faced7e0 GS |
715 | cft = &h->cgroup_files_dfl[0]; |
716 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max", buf); | |
717 | cft->private = MEMFILE_PRIVATE(idx, RES_LIMIT); | |
718 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
719 | cft->write = hugetlb_cgroup_write_dfl; | |
720 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
721 | ||
cdc2fcfe | 722 | /* Add the reservation limit file */ |
faced7e0 | 723 | cft = &h->cgroup_files_dfl[1]; |
cdc2fcfe MA |
724 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.max", buf); |
725 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_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 | ||
730 | /* Add the current usage file */ | |
731 | cft = &h->cgroup_files_dfl[2]; | |
faced7e0 GS |
732 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.current", buf); |
733 | cft->private = MEMFILE_PRIVATE(idx, RES_USAGE); | |
734 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
735 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
736 | ||
cdc2fcfe MA |
737 | /* Add the current reservation usage file */ |
738 | cft = &h->cgroup_files_dfl[3]; | |
739 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.current", buf); | |
740 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_USAGE); | |
741 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
742 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
743 | ||
faced7e0 | 744 | /* Add the events file */ |
cdc2fcfe | 745 | cft = &h->cgroup_files_dfl[4]; |
faced7e0 GS |
746 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events", buf); |
747 | cft->private = MEMFILE_PRIVATE(idx, 0); | |
748 | cft->seq_show = hugetlb_events_show; | |
d5a16959 | 749 | cft->file_offset = offsetof(struct hugetlb_cgroup, events_file[idx]); |
faced7e0 GS |
750 | cft->flags = CFTYPE_NOT_ON_ROOT; |
751 | ||
752 | /* Add the events.local file */ | |
cdc2fcfe | 753 | cft = &h->cgroup_files_dfl[5]; |
faced7e0 GS |
754 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events.local", buf); |
755 | cft->private = MEMFILE_PRIVATE(idx, 0); | |
756 | cft->seq_show = hugetlb_events_local_show; | |
757 | cft->file_offset = offsetof(struct hugetlb_cgroup, | |
d5a16959 | 758 | events_local_file[idx]); |
faced7e0 GS |
759 | cft->flags = CFTYPE_NOT_ON_ROOT; |
760 | ||
f4776199 | 761 | /* Add the numa stat file */ |
cdc2fcfe | 762 | cft = &h->cgroup_files_dfl[6]; |
f4776199 | 763 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf); |
2727cfe4 | 764 | cft->private = MEMFILE_PRIVATE(idx, 0); |
f4776199 MA |
765 | cft->seq_show = hugetlb_cgroup_read_numa_stat; |
766 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
767 | ||
768 | /* NULL terminate the last cft */ | |
769 | cft = &h->cgroup_files_dfl[7]; | |
faced7e0 GS |
770 | memset(cft, 0, sizeof(*cft)); |
771 | ||
772 | WARN_ON(cgroup_add_dfl_cftypes(&hugetlb_cgrp_subsys, | |
773 | h->cgroup_files_dfl)); | |
774 | } | |
775 | ||
776 | static void __init __hugetlb_cgroup_file_legacy_init(int idx) | |
777 | { | |
778 | char buf[32]; | |
779 | struct cftype *cft; | |
780 | struct hstate *h = &hstates[idx]; | |
781 | ||
782 | /* format the size */ | |
cdc2fcfe | 783 | mem_fmt(buf, sizeof(buf), huge_page_size(h)); |
faced7e0 GS |
784 | |
785 | /* Add the limit file */ | |
786 | cft = &h->cgroup_files_legacy[0]; | |
abb8206c AK |
787 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.limit_in_bytes", buf); |
788 | cft->private = MEMFILE_PRIVATE(idx, RES_LIMIT); | |
716f479d | 789 | cft->read_u64 = hugetlb_cgroup_read_u64; |
faced7e0 | 790 | cft->write = hugetlb_cgroup_write_legacy; |
abb8206c | 791 | |
cdc2fcfe | 792 | /* Add the reservation limit file */ |
faced7e0 | 793 | cft = &h->cgroup_files_legacy[1]; |
cdc2fcfe MA |
794 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.limit_in_bytes", buf); |
795 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_LIMIT); | |
796 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
797 | cft->write = hugetlb_cgroup_write_legacy; | |
798 | ||
799 | /* Add the usage file */ | |
800 | cft = &h->cgroup_files_legacy[2]; | |
abb8206c AK |
801 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.usage_in_bytes", buf); |
802 | cft->private = MEMFILE_PRIVATE(idx, RES_USAGE); | |
716f479d | 803 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 804 | |
cdc2fcfe MA |
805 | /* Add the reservation usage file */ |
806 | cft = &h->cgroup_files_legacy[3]; | |
807 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.usage_in_bytes", buf); | |
808 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_USAGE); | |
809 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
810 | ||
abb8206c | 811 | /* Add the MAX usage file */ |
cdc2fcfe | 812 | cft = &h->cgroup_files_legacy[4]; |
abb8206c AK |
813 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max_usage_in_bytes", buf); |
814 | cft->private = MEMFILE_PRIVATE(idx, RES_MAX_USAGE); | |
6770c64e | 815 | cft->write = hugetlb_cgroup_reset; |
716f479d | 816 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 817 | |
cdc2fcfe MA |
818 | /* Add the MAX reservation usage file */ |
819 | cft = &h->cgroup_files_legacy[5]; | |
820 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.max_usage_in_bytes", buf); | |
821 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_MAX_USAGE); | |
822 | cft->write = hugetlb_cgroup_reset; | |
823 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
824 | ||
abb8206c | 825 | /* Add the failcntfile */ |
cdc2fcfe | 826 | cft = &h->cgroup_files_legacy[6]; |
abb8206c | 827 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.failcnt", buf); |
cdc2fcfe MA |
828 | cft->private = MEMFILE_PRIVATE(idx, RES_FAILCNT); |
829 | cft->write = hugetlb_cgroup_reset; | |
830 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
831 | ||
832 | /* Add the reservation failcntfile */ | |
833 | cft = &h->cgroup_files_legacy[7]; | |
834 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.failcnt", buf); | |
835 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_FAILCNT); | |
6770c64e | 836 | cft->write = hugetlb_cgroup_reset; |
716f479d | 837 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 838 | |
f4776199 | 839 | /* Add the numa stat file */ |
cdc2fcfe | 840 | cft = &h->cgroup_files_legacy[8]; |
f4776199 MA |
841 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf); |
842 | cft->private = MEMFILE_PRIVATE(idx, 1); | |
843 | cft->seq_show = hugetlb_cgroup_read_numa_stat; | |
844 | ||
845 | /* NULL terminate the last cft */ | |
846 | cft = &h->cgroup_files_legacy[9]; | |
abb8206c AK |
847 | memset(cft, 0, sizeof(*cft)); |
848 | ||
2cf669a5 | 849 | WARN_ON(cgroup_add_legacy_cftypes(&hugetlb_cgrp_subsys, |
faced7e0 GS |
850 | h->cgroup_files_legacy)); |
851 | } | |
852 | ||
853 | static void __init __hugetlb_cgroup_file_init(int idx) | |
854 | { | |
855 | __hugetlb_cgroup_file_dfl_init(idx); | |
856 | __hugetlb_cgroup_file_legacy_init(idx); | |
7179e7bf JW |
857 | } |
858 | ||
859 | void __init hugetlb_cgroup_file_init(void) | |
860 | { | |
861 | struct hstate *h; | |
862 | ||
59838b25 FL |
863 | for_each_hstate(h) |
864 | __hugetlb_cgroup_file_init(hstate_index(h)); | |
abb8206c AK |
865 | } |
866 | ||
75754681 AK |
867 | /* |
868 | * hugetlb_lock will make sure a parallel cgroup rmdir won't happen | |
869 | * when we migrate hugepages | |
870 | */ | |
29f39430 | 871 | void hugetlb_cgroup_migrate(struct folio *old_folio, struct folio *new_folio) |
8e6ac7fa AK |
872 | { |
873 | struct hugetlb_cgroup *h_cg; | |
1adc4d41 | 874 | struct hugetlb_cgroup *h_cg_rsvd; |
29f39430 | 875 | struct hstate *h = folio_hstate(old_folio); |
8e6ac7fa AK |
876 | |
877 | if (hugetlb_cgroup_disabled()) | |
878 | return; | |
879 | ||
db71ef79 | 880 | spin_lock_irq(&hugetlb_lock); |
f074732d SK |
881 | h_cg = hugetlb_cgroup_from_folio(old_folio); |
882 | h_cg_rsvd = hugetlb_cgroup_from_folio_rsvd(old_folio); | |
de656ed3 SK |
883 | set_hugetlb_cgroup(old_folio, NULL); |
884 | set_hugetlb_cgroup_rsvd(old_folio, NULL); | |
8e6ac7fa AK |
885 | |
886 | /* move the h_cg details to new cgroup */ | |
de656ed3 SK |
887 | set_hugetlb_cgroup(new_folio, h_cg); |
888 | set_hugetlb_cgroup_rsvd(new_folio, h_cg_rsvd); | |
29f39430 | 889 | list_move(&new_folio->lru, &h->hugepage_activelist); |
db71ef79 | 890 | spin_unlock_irq(&hugetlb_lock); |
8e6ac7fa AK |
891 | return; |
892 | } | |
893 | ||
faced7e0 GS |
894 | static struct cftype hugetlb_files[] = { |
895 | {} /* terminate */ | |
896 | }; | |
897 | ||
073219e9 | 898 | struct cgroup_subsys hugetlb_cgrp_subsys = { |
92fb9748 TH |
899 | .css_alloc = hugetlb_cgroup_css_alloc, |
900 | .css_offline = hugetlb_cgroup_css_offline, | |
901 | .css_free = hugetlb_cgroup_css_free, | |
faced7e0 GS |
902 | .dfl_cftypes = hugetlb_files, |
903 | .legacy_cftypes = hugetlb_files, | |
2bc64a20 | 904 | }; |