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); |
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; | |
265 | /* | |
266 | * We don't charge any cgroup if the compound page have less | |
267 | * than 3 pages. | |
268 | */ | |
269 | if (huge_page_order(&hstates[idx]) < HUGETLB_CGROUP_MIN_ORDER) | |
270 | goto done; | |
271 | again: | |
272 | rcu_read_lock(); | |
273 | h_cg = hugetlb_cgroup_from_task(current); | |
0362f326 | 274 | if (!css_tryget(&h_cg->css)) { |
6d76dcf4 AK |
275 | rcu_read_unlock(); |
276 | goto again; | |
277 | } | |
278 | rcu_read_unlock(); | |
279 | ||
1adc4d41 MA |
280 | if (!page_counter_try_charge( |
281 | __hugetlb_cgroup_counter_from_cgroup(h_cg, idx, rsvd), | |
282 | nr_pages, &counter)) { | |
6071ca52 | 283 | ret = -ENOMEM; |
726b7bbe | 284 | hugetlb_event(h_cg, idx, HUGETLB_MAX); |
1adc4d41 MA |
285 | css_put(&h_cg->css); |
286 | goto done; | |
faced7e0 | 287 | } |
1adc4d41 MA |
288 | /* Reservations take a reference to the css because they do not get |
289 | * reparented. | |
290 | */ | |
291 | if (!rsvd) | |
292 | css_put(&h_cg->css); | |
6d76dcf4 AK |
293 | done: |
294 | *ptr = h_cg; | |
295 | return ret; | |
296 | } | |
297 | ||
1adc4d41 MA |
298 | int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages, |
299 | struct hugetlb_cgroup **ptr) | |
300 | { | |
301 | return __hugetlb_cgroup_charge_cgroup(idx, nr_pages, ptr, false); | |
302 | } | |
303 | ||
304 | int hugetlb_cgroup_charge_cgroup_rsvd(int idx, unsigned long nr_pages, | |
305 | struct hugetlb_cgroup **ptr) | |
306 | { | |
307 | return __hugetlb_cgroup_charge_cgroup(idx, nr_pages, ptr, true); | |
308 | } | |
309 | ||
94ae8ba7 | 310 | /* Should be called with hugetlb_lock held */ |
1adc4d41 MA |
311 | static void __hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages, |
312 | struct hugetlb_cgroup *h_cg, | |
541b7c7b | 313 | struct folio *folio, bool rsvd) |
6d76dcf4 AK |
314 | { |
315 | if (hugetlb_cgroup_disabled() || !h_cg) | |
316 | return; | |
317 | ||
541b7c7b | 318 | __set_hugetlb_cgroup(folio, h_cg, rsvd); |
f4776199 MA |
319 | if (!rsvd) { |
320 | unsigned long usage = | |
541b7c7b | 321 | h_cg->nodeinfo[folio_nid(folio)]->usage[idx]; |
f4776199 MA |
322 | /* |
323 | * This write is not atomic due to fetching usage and writing | |
324 | * to it, but that's fine because we call this with | |
325 | * hugetlb_lock held anyway. | |
326 | */ | |
541b7c7b | 327 | WRITE_ONCE(h_cg->nodeinfo[folio_nid(folio)]->usage[idx], |
f4776199 MA |
328 | usage + nr_pages); |
329 | } | |
6d76dcf4 AK |
330 | } |
331 | ||
1adc4d41 MA |
332 | void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages, |
333 | struct hugetlb_cgroup *h_cg, | |
334 | struct page *page) | |
335 | { | |
541b7c7b SK |
336 | struct folio *folio = page_folio(page); |
337 | ||
338 | __hugetlb_cgroup_commit_charge(idx, nr_pages, h_cg, folio, false); | |
1adc4d41 MA |
339 | } |
340 | ||
341 | void hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages, | |
342 | struct hugetlb_cgroup *h_cg, | |
343 | struct page *page) | |
344 | { | |
541b7c7b SK |
345 | struct folio *folio = page_folio(page); |
346 | ||
347 | __hugetlb_cgroup_commit_charge(idx, nr_pages, h_cg, folio, true); | |
1adc4d41 MA |
348 | } |
349 | ||
6d76dcf4 AK |
350 | /* |
351 | * Should be called with hugetlb_lock held | |
352 | */ | |
d4ab0316 SK |
353 | static void __hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages, |
354 | struct folio *folio, bool rsvd) | |
6d76dcf4 AK |
355 | { |
356 | struct hugetlb_cgroup *h_cg; | |
6d76dcf4 AK |
357 | |
358 | if (hugetlb_cgroup_disabled()) | |
359 | return; | |
7ea8574e | 360 | lockdep_assert_held(&hugetlb_lock); |
f074732d | 361 | h_cg = __hugetlb_cgroup_from_folio(folio, rsvd); |
6d76dcf4 AK |
362 | if (unlikely(!h_cg)) |
363 | return; | |
f074732d | 364 | __set_hugetlb_cgroup(folio, NULL, rsvd); |
1adc4d41 MA |
365 | |
366 | page_counter_uncharge(__hugetlb_cgroup_counter_from_cgroup(h_cg, idx, | |
367 | rsvd), | |
368 | nr_pages); | |
369 | ||
370 | if (rsvd) | |
371 | css_put(&h_cg->css); | |
f4776199 MA |
372 | else { |
373 | unsigned long usage = | |
d4ab0316 | 374 | h_cg->nodeinfo[folio_nid(folio)]->usage[idx]; |
f4776199 MA |
375 | /* |
376 | * This write is not atomic due to fetching usage and writing | |
377 | * to it, but that's fine because we call this with | |
378 | * hugetlb_lock held anyway. | |
379 | */ | |
d4ab0316 | 380 | WRITE_ONCE(h_cg->nodeinfo[folio_nid(folio)]->usage[idx], |
f4776199 MA |
381 | usage - nr_pages); |
382 | } | |
6d76dcf4 AK |
383 | } |
384 | ||
d4ab0316 SK |
385 | void hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages, |
386 | struct folio *folio) | |
1adc4d41 | 387 | { |
d4ab0316 | 388 | __hugetlb_cgroup_uncharge_folio(idx, nr_pages, folio, false); |
1adc4d41 MA |
389 | } |
390 | ||
d4ab0316 SK |
391 | void hugetlb_cgroup_uncharge_folio_rsvd(int idx, unsigned long nr_pages, |
392 | struct folio *folio) | |
1adc4d41 | 393 | { |
d4ab0316 | 394 | __hugetlb_cgroup_uncharge_folio(idx, nr_pages, folio, true); |
1adc4d41 MA |
395 | } |
396 | ||
397 | static void __hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, | |
398 | struct hugetlb_cgroup *h_cg, | |
399 | bool rsvd) | |
6d76dcf4 | 400 | { |
6d76dcf4 AK |
401 | if (hugetlb_cgroup_disabled() || !h_cg) |
402 | return; | |
403 | ||
404 | if (huge_page_order(&hstates[idx]) < HUGETLB_CGROUP_MIN_ORDER) | |
405 | return; | |
406 | ||
1adc4d41 MA |
407 | page_counter_uncharge(__hugetlb_cgroup_counter_from_cgroup(h_cg, idx, |
408 | rsvd), | |
409 | nr_pages); | |
410 | ||
411 | if (rsvd) | |
412 | css_put(&h_cg->css); | |
413 | } | |
414 | ||
415 | void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, | |
416 | struct hugetlb_cgroup *h_cg) | |
417 | { | |
418 | __hugetlb_cgroup_uncharge_cgroup(idx, nr_pages, h_cg, false); | |
419 | } | |
420 | ||
421 | void hugetlb_cgroup_uncharge_cgroup_rsvd(int idx, unsigned long nr_pages, | |
422 | struct hugetlb_cgroup *h_cg) | |
423 | { | |
424 | __hugetlb_cgroup_uncharge_cgroup(idx, nr_pages, h_cg, true); | |
425 | } | |
426 | ||
e9fe92ae MA |
427 | void hugetlb_cgroup_uncharge_counter(struct resv_map *resv, unsigned long start, |
428 | unsigned long end) | |
1adc4d41 | 429 | { |
e9fe92ae MA |
430 | if (hugetlb_cgroup_disabled() || !resv || !resv->reservation_counter || |
431 | !resv->css) | |
1adc4d41 MA |
432 | return; |
433 | ||
e9fe92ae MA |
434 | page_counter_uncharge(resv->reservation_counter, |
435 | (end - start) * resv->pages_per_hpage); | |
436 | css_put(resv->css); | |
6d76dcf4 AK |
437 | } |
438 | ||
075a61d0 MA |
439 | void hugetlb_cgroup_uncharge_file_region(struct resv_map *resv, |
440 | struct file_region *rg, | |
d85aecf2 ML |
441 | unsigned long nr_pages, |
442 | bool region_del) | |
075a61d0 MA |
443 | { |
444 | if (hugetlb_cgroup_disabled() || !resv || !rg || !nr_pages) | |
445 | return; | |
446 | ||
862f7f65 | 447 | if (rg->reservation_counter && resv->pages_per_hpage && |
075a61d0 MA |
448 | !resv->reservation_counter) { |
449 | page_counter_uncharge(rg->reservation_counter, | |
450 | nr_pages * resv->pages_per_hpage); | |
d85aecf2 ML |
451 | /* |
452 | * Only do css_put(rg->css) when we delete the entire region | |
453 | * because one file_region must hold exactly one css reference. | |
454 | */ | |
455 | if (region_del) | |
456 | css_put(rg->css); | |
075a61d0 MA |
457 | } |
458 | } | |
459 | ||
71f87bee JW |
460 | enum { |
461 | RES_USAGE, | |
cdc2fcfe | 462 | RES_RSVD_USAGE, |
71f87bee | 463 | RES_LIMIT, |
cdc2fcfe | 464 | RES_RSVD_LIMIT, |
71f87bee | 465 | RES_MAX_USAGE, |
cdc2fcfe | 466 | RES_RSVD_MAX_USAGE, |
71f87bee | 467 | RES_FAILCNT, |
cdc2fcfe | 468 | RES_RSVD_FAILCNT, |
71f87bee JW |
469 | }; |
470 | ||
f4776199 MA |
471 | static int hugetlb_cgroup_read_numa_stat(struct seq_file *seq, void *dummy) |
472 | { | |
473 | int nid; | |
474 | struct cftype *cft = seq_cft(seq); | |
475 | int idx = MEMFILE_IDX(cft->private); | |
476 | bool legacy = MEMFILE_ATTR(cft->private); | |
477 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
478 | struct cgroup_subsys_state *css; | |
479 | unsigned long usage; | |
480 | ||
481 | if (legacy) { | |
482 | /* Add up usage across all nodes for the non-hierarchical total. */ | |
483 | usage = 0; | |
484 | for_each_node_state(nid, N_MEMORY) | |
485 | usage += READ_ONCE(h_cg->nodeinfo[nid]->usage[idx]); | |
486 | seq_printf(seq, "total=%lu", usage * PAGE_SIZE); | |
487 | ||
488 | /* Simply print the per-node usage for the non-hierarchical total. */ | |
489 | for_each_node_state(nid, N_MEMORY) | |
490 | seq_printf(seq, " N%d=%lu", nid, | |
491 | READ_ONCE(h_cg->nodeinfo[nid]->usage[idx]) * | |
492 | PAGE_SIZE); | |
493 | seq_putc(seq, '\n'); | |
494 | } | |
495 | ||
496 | /* | |
497 | * The hierarchical total is pretty much the value recorded by the | |
498 | * counter, so use that. | |
499 | */ | |
500 | seq_printf(seq, "%stotal=%lu", legacy ? "hierarchical_" : "", | |
501 | page_counter_read(&h_cg->hugepage[idx]) * PAGE_SIZE); | |
502 | ||
503 | /* | |
504 | * For each node, transverse the css tree to obtain the hierarchical | |
505 | * node usage. | |
506 | */ | |
507 | for_each_node_state(nid, N_MEMORY) { | |
508 | usage = 0; | |
509 | rcu_read_lock(); | |
510 | css_for_each_descendant_pre(css, &h_cg->css) { | |
511 | usage += READ_ONCE(hugetlb_cgroup_from_css(css) | |
512 | ->nodeinfo[nid] | |
513 | ->usage[idx]); | |
514 | } | |
515 | rcu_read_unlock(); | |
516 | seq_printf(seq, " N%d=%lu", nid, usage * PAGE_SIZE); | |
517 | } | |
518 | ||
519 | seq_putc(seq, '\n'); | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
716f479d TH |
524 | static u64 hugetlb_cgroup_read_u64(struct cgroup_subsys_state *css, |
525 | struct cftype *cft) | |
abb8206c | 526 | { |
71f87bee | 527 | struct page_counter *counter; |
cdc2fcfe | 528 | struct page_counter *rsvd_counter; |
182446d0 | 529 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(css); |
abb8206c | 530 | |
71f87bee | 531 | counter = &h_cg->hugepage[MEMFILE_IDX(cft->private)]; |
cdc2fcfe | 532 | rsvd_counter = &h_cg->rsvd_hugepage[MEMFILE_IDX(cft->private)]; |
abb8206c | 533 | |
71f87bee JW |
534 | switch (MEMFILE_ATTR(cft->private)) { |
535 | case RES_USAGE: | |
536 | return (u64)page_counter_read(counter) * PAGE_SIZE; | |
cdc2fcfe MA |
537 | case RES_RSVD_USAGE: |
538 | return (u64)page_counter_read(rsvd_counter) * PAGE_SIZE; | |
71f87bee | 539 | case RES_LIMIT: |
bbec2e15 | 540 | return (u64)counter->max * PAGE_SIZE; |
cdc2fcfe MA |
541 | case RES_RSVD_LIMIT: |
542 | return (u64)rsvd_counter->max * PAGE_SIZE; | |
71f87bee JW |
543 | case RES_MAX_USAGE: |
544 | return (u64)counter->watermark * PAGE_SIZE; | |
cdc2fcfe MA |
545 | case RES_RSVD_MAX_USAGE: |
546 | return (u64)rsvd_counter->watermark * PAGE_SIZE; | |
71f87bee JW |
547 | case RES_FAILCNT: |
548 | return counter->failcnt; | |
cdc2fcfe MA |
549 | case RES_RSVD_FAILCNT: |
550 | return rsvd_counter->failcnt; | |
71f87bee JW |
551 | default: |
552 | BUG(); | |
553 | } | |
abb8206c AK |
554 | } |
555 | ||
faced7e0 GS |
556 | static int hugetlb_cgroup_read_u64_max(struct seq_file *seq, void *v) |
557 | { | |
558 | int idx; | |
559 | u64 val; | |
560 | struct cftype *cft = seq_cft(seq); | |
561 | unsigned long limit; | |
562 | struct page_counter *counter; | |
563 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
564 | ||
565 | idx = MEMFILE_IDX(cft->private); | |
566 | counter = &h_cg->hugepage[idx]; | |
567 | ||
568 | limit = round_down(PAGE_COUNTER_MAX, | |
8938494c | 569 | pages_per_huge_page(&hstates[idx])); |
faced7e0 GS |
570 | |
571 | switch (MEMFILE_ATTR(cft->private)) { | |
cdc2fcfe MA |
572 | case RES_RSVD_USAGE: |
573 | counter = &h_cg->rsvd_hugepage[idx]; | |
e4a9bc58 | 574 | fallthrough; |
faced7e0 GS |
575 | case RES_USAGE: |
576 | val = (u64)page_counter_read(counter); | |
577 | seq_printf(seq, "%llu\n", val * PAGE_SIZE); | |
578 | break; | |
cdc2fcfe MA |
579 | case RES_RSVD_LIMIT: |
580 | counter = &h_cg->rsvd_hugepage[idx]; | |
e4a9bc58 | 581 | fallthrough; |
faced7e0 GS |
582 | case RES_LIMIT: |
583 | val = (u64)counter->max; | |
584 | if (val == limit) | |
585 | seq_puts(seq, "max\n"); | |
586 | else | |
587 | seq_printf(seq, "%llu\n", val * PAGE_SIZE); | |
588 | break; | |
589 | default: | |
590 | BUG(); | |
591 | } | |
592 | ||
593 | return 0; | |
594 | } | |
595 | ||
71f87bee JW |
596 | static DEFINE_MUTEX(hugetlb_limit_mutex); |
597 | ||
451af504 | 598 | static ssize_t hugetlb_cgroup_write(struct kernfs_open_file *of, |
faced7e0 GS |
599 | char *buf, size_t nbytes, loff_t off, |
600 | const char *max) | |
abb8206c | 601 | { |
71f87bee JW |
602 | int ret, idx; |
603 | unsigned long nr_pages; | |
451af504 | 604 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(of_css(of)); |
cdc2fcfe | 605 | bool rsvd = false; |
abb8206c | 606 | |
71f87bee JW |
607 | if (hugetlb_cgroup_is_root(h_cg)) /* Can't set limit on root */ |
608 | return -EINVAL; | |
609 | ||
451af504 | 610 | buf = strstrip(buf); |
faced7e0 | 611 | ret = page_counter_memparse(buf, max, &nr_pages); |
71f87bee JW |
612 | if (ret) |
613 | return ret; | |
614 | ||
451af504 | 615 | idx = MEMFILE_IDX(of_cft(of)->private); |
8938494c | 616 | nr_pages = round_down(nr_pages, pages_per_huge_page(&hstates[idx])); |
abb8206c | 617 | |
71f87bee | 618 | switch (MEMFILE_ATTR(of_cft(of)->private)) { |
cdc2fcfe MA |
619 | case RES_RSVD_LIMIT: |
620 | rsvd = true; | |
e4a9bc58 | 621 | fallthrough; |
abb8206c | 622 | case RES_LIMIT: |
71f87bee | 623 | mutex_lock(&hugetlb_limit_mutex); |
cdc2fcfe | 624 | ret = page_counter_set_max( |
1adc4d41 | 625 | __hugetlb_cgroup_counter_from_cgroup(h_cg, idx, rsvd), |
cdc2fcfe | 626 | nr_pages); |
71f87bee | 627 | mutex_unlock(&hugetlb_limit_mutex); |
abb8206c AK |
628 | break; |
629 | default: | |
630 | ret = -EINVAL; | |
631 | break; | |
632 | } | |
451af504 | 633 | return ret ?: nbytes; |
abb8206c AK |
634 | } |
635 | ||
faced7e0 GS |
636 | static ssize_t hugetlb_cgroup_write_legacy(struct kernfs_open_file *of, |
637 | char *buf, size_t nbytes, loff_t off) | |
638 | { | |
639 | return hugetlb_cgroup_write(of, buf, nbytes, off, "-1"); | |
640 | } | |
641 | ||
642 | static ssize_t hugetlb_cgroup_write_dfl(struct kernfs_open_file *of, | |
643 | char *buf, size_t nbytes, loff_t off) | |
644 | { | |
645 | return hugetlb_cgroup_write(of, buf, nbytes, off, "max"); | |
646 | } | |
647 | ||
6770c64e TH |
648 | static ssize_t hugetlb_cgroup_reset(struct kernfs_open_file *of, |
649 | char *buf, size_t nbytes, loff_t off) | |
abb8206c | 650 | { |
71f87bee | 651 | int ret = 0; |
cdc2fcfe | 652 | struct page_counter *counter, *rsvd_counter; |
6770c64e | 653 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(of_css(of)); |
abb8206c | 654 | |
71f87bee | 655 | counter = &h_cg->hugepage[MEMFILE_IDX(of_cft(of)->private)]; |
cdc2fcfe | 656 | rsvd_counter = &h_cg->rsvd_hugepage[MEMFILE_IDX(of_cft(of)->private)]; |
abb8206c | 657 | |
71f87bee | 658 | switch (MEMFILE_ATTR(of_cft(of)->private)) { |
abb8206c | 659 | case RES_MAX_USAGE: |
71f87bee | 660 | page_counter_reset_watermark(counter); |
abb8206c | 661 | break; |
cdc2fcfe MA |
662 | case RES_RSVD_MAX_USAGE: |
663 | page_counter_reset_watermark(rsvd_counter); | |
664 | break; | |
abb8206c | 665 | case RES_FAILCNT: |
71f87bee | 666 | counter->failcnt = 0; |
abb8206c | 667 | break; |
cdc2fcfe MA |
668 | case RES_RSVD_FAILCNT: |
669 | rsvd_counter->failcnt = 0; | |
670 | break; | |
abb8206c AK |
671 | default: |
672 | ret = -EINVAL; | |
673 | break; | |
674 | } | |
6770c64e | 675 | return ret ?: nbytes; |
abb8206c AK |
676 | } |
677 | ||
678 | static char *mem_fmt(char *buf, int size, unsigned long hsize) | |
679 | { | |
abfb09e2 ML |
680 | if (hsize >= SZ_1G) |
681 | snprintf(buf, size, "%luGB", hsize / SZ_1G); | |
682 | else if (hsize >= SZ_1M) | |
683 | snprintf(buf, size, "%luMB", hsize / SZ_1M); | |
abb8206c | 684 | else |
abfb09e2 | 685 | snprintf(buf, size, "%luKB", hsize / SZ_1K); |
abb8206c AK |
686 | return buf; |
687 | } | |
688 | ||
faced7e0 GS |
689 | static int __hugetlb_events_show(struct seq_file *seq, bool local) |
690 | { | |
691 | int idx; | |
692 | long max; | |
693 | struct cftype *cft = seq_cft(seq); | |
694 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
695 | ||
696 | idx = MEMFILE_IDX(cft->private); | |
697 | ||
698 | if (local) | |
699 | max = atomic_long_read(&h_cg->events_local[idx][HUGETLB_MAX]); | |
700 | else | |
701 | max = atomic_long_read(&h_cg->events[idx][HUGETLB_MAX]); | |
702 | ||
703 | seq_printf(seq, "max %lu\n", max); | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
708 | static int hugetlb_events_show(struct seq_file *seq, void *v) | |
709 | { | |
710 | return __hugetlb_events_show(seq, false); | |
711 | } | |
712 | ||
713 | static int hugetlb_events_local_show(struct seq_file *seq, void *v) | |
714 | { | |
715 | return __hugetlb_events_show(seq, true); | |
716 | } | |
717 | ||
718 | static void __init __hugetlb_cgroup_file_dfl_init(int idx) | |
abb8206c AK |
719 | { |
720 | char buf[32]; | |
721 | struct cftype *cft; | |
722 | struct hstate *h = &hstates[idx]; | |
723 | ||
724 | /* format the size */ | |
cdc2fcfe | 725 | mem_fmt(buf, sizeof(buf), huge_page_size(h)); |
abb8206c AK |
726 | |
727 | /* Add the limit file */ | |
faced7e0 GS |
728 | cft = &h->cgroup_files_dfl[0]; |
729 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max", buf); | |
730 | cft->private = MEMFILE_PRIVATE(idx, RES_LIMIT); | |
731 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
732 | cft->write = hugetlb_cgroup_write_dfl; | |
733 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
734 | ||
cdc2fcfe | 735 | /* Add the reservation limit file */ |
faced7e0 | 736 | cft = &h->cgroup_files_dfl[1]; |
cdc2fcfe MA |
737 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.max", buf); |
738 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_LIMIT); | |
739 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
740 | cft->write = hugetlb_cgroup_write_dfl; | |
741 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
742 | ||
743 | /* Add the current usage file */ | |
744 | cft = &h->cgroup_files_dfl[2]; | |
faced7e0 GS |
745 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.current", buf); |
746 | cft->private = MEMFILE_PRIVATE(idx, RES_USAGE); | |
747 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
748 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
749 | ||
cdc2fcfe MA |
750 | /* Add the current reservation usage file */ |
751 | cft = &h->cgroup_files_dfl[3]; | |
752 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.current", buf); | |
753 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_USAGE); | |
754 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
755 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
756 | ||
faced7e0 | 757 | /* Add the events file */ |
cdc2fcfe | 758 | cft = &h->cgroup_files_dfl[4]; |
faced7e0 GS |
759 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events", buf); |
760 | cft->private = MEMFILE_PRIVATE(idx, 0); | |
761 | cft->seq_show = hugetlb_events_show; | |
d5a16959 | 762 | cft->file_offset = offsetof(struct hugetlb_cgroup, events_file[idx]); |
faced7e0 GS |
763 | cft->flags = CFTYPE_NOT_ON_ROOT; |
764 | ||
765 | /* Add the events.local file */ | |
cdc2fcfe | 766 | cft = &h->cgroup_files_dfl[5]; |
faced7e0 GS |
767 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events.local", buf); |
768 | cft->private = MEMFILE_PRIVATE(idx, 0); | |
769 | cft->seq_show = hugetlb_events_local_show; | |
770 | cft->file_offset = offsetof(struct hugetlb_cgroup, | |
d5a16959 | 771 | events_local_file[idx]); |
faced7e0 GS |
772 | cft->flags = CFTYPE_NOT_ON_ROOT; |
773 | ||
f4776199 | 774 | /* Add the numa stat file */ |
cdc2fcfe | 775 | cft = &h->cgroup_files_dfl[6]; |
f4776199 | 776 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf); |
2727cfe4 | 777 | cft->private = MEMFILE_PRIVATE(idx, 0); |
f4776199 MA |
778 | cft->seq_show = hugetlb_cgroup_read_numa_stat; |
779 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
780 | ||
781 | /* NULL terminate the last cft */ | |
782 | cft = &h->cgroup_files_dfl[7]; | |
faced7e0 GS |
783 | memset(cft, 0, sizeof(*cft)); |
784 | ||
785 | WARN_ON(cgroup_add_dfl_cftypes(&hugetlb_cgrp_subsys, | |
786 | h->cgroup_files_dfl)); | |
787 | } | |
788 | ||
789 | static void __init __hugetlb_cgroup_file_legacy_init(int idx) | |
790 | { | |
791 | char buf[32]; | |
792 | struct cftype *cft; | |
793 | struct hstate *h = &hstates[idx]; | |
794 | ||
795 | /* format the size */ | |
cdc2fcfe | 796 | mem_fmt(buf, sizeof(buf), huge_page_size(h)); |
faced7e0 GS |
797 | |
798 | /* Add the limit file */ | |
799 | cft = &h->cgroup_files_legacy[0]; | |
abb8206c AK |
800 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.limit_in_bytes", buf); |
801 | cft->private = MEMFILE_PRIVATE(idx, RES_LIMIT); | |
716f479d | 802 | cft->read_u64 = hugetlb_cgroup_read_u64; |
faced7e0 | 803 | cft->write = hugetlb_cgroup_write_legacy; |
abb8206c | 804 | |
cdc2fcfe | 805 | /* Add the reservation limit file */ |
faced7e0 | 806 | cft = &h->cgroup_files_legacy[1]; |
cdc2fcfe MA |
807 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.limit_in_bytes", buf); |
808 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_LIMIT); | |
809 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
810 | cft->write = hugetlb_cgroup_write_legacy; | |
811 | ||
812 | /* Add the usage file */ | |
813 | cft = &h->cgroup_files_legacy[2]; | |
abb8206c AK |
814 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.usage_in_bytes", buf); |
815 | cft->private = MEMFILE_PRIVATE(idx, RES_USAGE); | |
716f479d | 816 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 817 | |
cdc2fcfe MA |
818 | /* Add the reservation usage file */ |
819 | cft = &h->cgroup_files_legacy[3]; | |
820 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.usage_in_bytes", buf); | |
821 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_USAGE); | |
822 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
823 | ||
abb8206c | 824 | /* Add the MAX usage file */ |
cdc2fcfe | 825 | cft = &h->cgroup_files_legacy[4]; |
abb8206c AK |
826 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max_usage_in_bytes", buf); |
827 | cft->private = MEMFILE_PRIVATE(idx, RES_MAX_USAGE); | |
6770c64e | 828 | cft->write = hugetlb_cgroup_reset; |
716f479d | 829 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 830 | |
cdc2fcfe MA |
831 | /* Add the MAX reservation usage file */ |
832 | cft = &h->cgroup_files_legacy[5]; | |
833 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.max_usage_in_bytes", buf); | |
834 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_MAX_USAGE); | |
835 | cft->write = hugetlb_cgroup_reset; | |
836 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
837 | ||
abb8206c | 838 | /* Add the failcntfile */ |
cdc2fcfe | 839 | cft = &h->cgroup_files_legacy[6]; |
abb8206c | 840 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.failcnt", buf); |
cdc2fcfe MA |
841 | cft->private = MEMFILE_PRIVATE(idx, RES_FAILCNT); |
842 | cft->write = hugetlb_cgroup_reset; | |
843 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
844 | ||
845 | /* Add the reservation failcntfile */ | |
846 | cft = &h->cgroup_files_legacy[7]; | |
847 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.failcnt", buf); | |
848 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_FAILCNT); | |
6770c64e | 849 | cft->write = hugetlb_cgroup_reset; |
716f479d | 850 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 851 | |
f4776199 | 852 | /* Add the numa stat file */ |
cdc2fcfe | 853 | cft = &h->cgroup_files_legacy[8]; |
f4776199 MA |
854 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf); |
855 | cft->private = MEMFILE_PRIVATE(idx, 1); | |
856 | cft->seq_show = hugetlb_cgroup_read_numa_stat; | |
857 | ||
858 | /* NULL terminate the last cft */ | |
859 | cft = &h->cgroup_files_legacy[9]; | |
abb8206c AK |
860 | memset(cft, 0, sizeof(*cft)); |
861 | ||
2cf669a5 | 862 | WARN_ON(cgroup_add_legacy_cftypes(&hugetlb_cgrp_subsys, |
faced7e0 GS |
863 | h->cgroup_files_legacy)); |
864 | } | |
865 | ||
866 | static void __init __hugetlb_cgroup_file_init(int idx) | |
867 | { | |
868 | __hugetlb_cgroup_file_dfl_init(idx); | |
869 | __hugetlb_cgroup_file_legacy_init(idx); | |
7179e7bf JW |
870 | } |
871 | ||
872 | void __init hugetlb_cgroup_file_init(void) | |
873 | { | |
874 | struct hstate *h; | |
875 | ||
876 | for_each_hstate(h) { | |
877 | /* | |
878 | * Add cgroup control files only if the huge page consists | |
879 | * of more than two normal pages. This is because we use | |
1d798ca3 | 880 | * page[2].private for storing cgroup details. |
7179e7bf JW |
881 | */ |
882 | if (huge_page_order(h) >= HUGETLB_CGROUP_MIN_ORDER) | |
883 | __hugetlb_cgroup_file_init(hstate_index(h)); | |
884 | } | |
abb8206c AK |
885 | } |
886 | ||
75754681 AK |
887 | /* |
888 | * hugetlb_lock will make sure a parallel cgroup rmdir won't happen | |
889 | * when we migrate hugepages | |
890 | */ | |
29f39430 | 891 | void hugetlb_cgroup_migrate(struct folio *old_folio, struct folio *new_folio) |
8e6ac7fa AK |
892 | { |
893 | struct hugetlb_cgroup *h_cg; | |
1adc4d41 | 894 | struct hugetlb_cgroup *h_cg_rsvd; |
29f39430 | 895 | struct hstate *h = folio_hstate(old_folio); |
8e6ac7fa AK |
896 | |
897 | if (hugetlb_cgroup_disabled()) | |
898 | return; | |
899 | ||
db71ef79 | 900 | spin_lock_irq(&hugetlb_lock); |
f074732d SK |
901 | h_cg = hugetlb_cgroup_from_folio(old_folio); |
902 | h_cg_rsvd = hugetlb_cgroup_from_folio_rsvd(old_folio); | |
de656ed3 SK |
903 | set_hugetlb_cgroup(old_folio, NULL); |
904 | set_hugetlb_cgroup_rsvd(old_folio, NULL); | |
8e6ac7fa AK |
905 | |
906 | /* move the h_cg details to new cgroup */ | |
de656ed3 SK |
907 | set_hugetlb_cgroup(new_folio, h_cg); |
908 | set_hugetlb_cgroup_rsvd(new_folio, h_cg_rsvd); | |
29f39430 | 909 | list_move(&new_folio->lru, &h->hugepage_activelist); |
db71ef79 | 910 | spin_unlock_irq(&hugetlb_lock); |
8e6ac7fa AK |
911 | return; |
912 | } | |
913 | ||
faced7e0 GS |
914 | static struct cftype hugetlb_files[] = { |
915 | {} /* terminate */ | |
916 | }; | |
917 | ||
073219e9 | 918 | struct cgroup_subsys hugetlb_cgrp_subsys = { |
92fb9748 TH |
919 | .css_alloc = hugetlb_cgroup_css_alloc, |
920 | .css_offline = hugetlb_cgroup_css_offline, | |
921 | .css_free = hugetlb_cgroup_css_free, | |
faced7e0 GS |
922 | .dfl_cftypes = hugetlb_files, |
923 | .legacy_cftypes = hugetlb_files, | |
2bc64a20 | 924 | }; |