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, | |
ff7d853b | 334 | struct folio *folio) |
1adc4d41 | 335 | { |
541b7c7b | 336 | __hugetlb_cgroup_commit_charge(idx, nr_pages, h_cg, folio, false); |
1adc4d41 MA |
337 | } |
338 | ||
339 | void hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages, | |
340 | struct hugetlb_cgroup *h_cg, | |
ff7d853b | 341 | struct folio *folio) |
1adc4d41 | 342 | { |
541b7c7b | 343 | __hugetlb_cgroup_commit_charge(idx, nr_pages, h_cg, folio, true); |
1adc4d41 MA |
344 | } |
345 | ||
6d76dcf4 AK |
346 | /* |
347 | * Should be called with hugetlb_lock held | |
348 | */ | |
d4ab0316 SK |
349 | static void __hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages, |
350 | struct folio *folio, bool rsvd) | |
6d76dcf4 AK |
351 | { |
352 | struct hugetlb_cgroup *h_cg; | |
6d76dcf4 AK |
353 | |
354 | if (hugetlb_cgroup_disabled()) | |
355 | return; | |
7ea8574e | 356 | lockdep_assert_held(&hugetlb_lock); |
f074732d | 357 | h_cg = __hugetlb_cgroup_from_folio(folio, rsvd); |
6d76dcf4 AK |
358 | if (unlikely(!h_cg)) |
359 | return; | |
f074732d | 360 | __set_hugetlb_cgroup(folio, NULL, rsvd); |
1adc4d41 MA |
361 | |
362 | page_counter_uncharge(__hugetlb_cgroup_counter_from_cgroup(h_cg, idx, | |
363 | rsvd), | |
364 | nr_pages); | |
365 | ||
366 | if (rsvd) | |
367 | css_put(&h_cg->css); | |
f4776199 MA |
368 | else { |
369 | unsigned long usage = | |
d4ab0316 | 370 | h_cg->nodeinfo[folio_nid(folio)]->usage[idx]; |
f4776199 MA |
371 | /* |
372 | * This write is not atomic due to fetching usage and writing | |
373 | * to it, but that's fine because we call this with | |
374 | * hugetlb_lock held anyway. | |
375 | */ | |
d4ab0316 | 376 | WRITE_ONCE(h_cg->nodeinfo[folio_nid(folio)]->usage[idx], |
f4776199 MA |
377 | usage - nr_pages); |
378 | } | |
6d76dcf4 AK |
379 | } |
380 | ||
d4ab0316 SK |
381 | void hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages, |
382 | struct folio *folio) | |
1adc4d41 | 383 | { |
d4ab0316 | 384 | __hugetlb_cgroup_uncharge_folio(idx, nr_pages, folio, false); |
1adc4d41 MA |
385 | } |
386 | ||
d4ab0316 SK |
387 | void hugetlb_cgroup_uncharge_folio_rsvd(int idx, unsigned long nr_pages, |
388 | struct folio *folio) | |
1adc4d41 | 389 | { |
d4ab0316 | 390 | __hugetlb_cgroup_uncharge_folio(idx, nr_pages, folio, true); |
1adc4d41 MA |
391 | } |
392 | ||
393 | static void __hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, | |
394 | struct hugetlb_cgroup *h_cg, | |
395 | bool rsvd) | |
6d76dcf4 | 396 | { |
6d76dcf4 AK |
397 | if (hugetlb_cgroup_disabled() || !h_cg) |
398 | return; | |
399 | ||
400 | if (huge_page_order(&hstates[idx]) < HUGETLB_CGROUP_MIN_ORDER) | |
401 | return; | |
402 | ||
1adc4d41 MA |
403 | page_counter_uncharge(__hugetlb_cgroup_counter_from_cgroup(h_cg, idx, |
404 | rsvd), | |
405 | nr_pages); | |
406 | ||
407 | if (rsvd) | |
408 | css_put(&h_cg->css); | |
409 | } | |
410 | ||
411 | void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, | |
412 | struct hugetlb_cgroup *h_cg) | |
413 | { | |
414 | __hugetlb_cgroup_uncharge_cgroup(idx, nr_pages, h_cg, false); | |
415 | } | |
416 | ||
417 | void hugetlb_cgroup_uncharge_cgroup_rsvd(int idx, unsigned long nr_pages, | |
418 | struct hugetlb_cgroup *h_cg) | |
419 | { | |
420 | __hugetlb_cgroup_uncharge_cgroup(idx, nr_pages, h_cg, true); | |
421 | } | |
422 | ||
e9fe92ae MA |
423 | void hugetlb_cgroup_uncharge_counter(struct resv_map *resv, unsigned long start, |
424 | unsigned long end) | |
1adc4d41 | 425 | { |
e9fe92ae MA |
426 | if (hugetlb_cgroup_disabled() || !resv || !resv->reservation_counter || |
427 | !resv->css) | |
1adc4d41 MA |
428 | return; |
429 | ||
e9fe92ae MA |
430 | page_counter_uncharge(resv->reservation_counter, |
431 | (end - start) * resv->pages_per_hpage); | |
432 | css_put(resv->css); | |
6d76dcf4 AK |
433 | } |
434 | ||
075a61d0 MA |
435 | void hugetlb_cgroup_uncharge_file_region(struct resv_map *resv, |
436 | struct file_region *rg, | |
d85aecf2 ML |
437 | unsigned long nr_pages, |
438 | bool region_del) | |
075a61d0 MA |
439 | { |
440 | if (hugetlb_cgroup_disabled() || !resv || !rg || !nr_pages) | |
441 | return; | |
442 | ||
862f7f65 | 443 | if (rg->reservation_counter && resv->pages_per_hpage && |
075a61d0 MA |
444 | !resv->reservation_counter) { |
445 | page_counter_uncharge(rg->reservation_counter, | |
446 | nr_pages * resv->pages_per_hpage); | |
d85aecf2 ML |
447 | /* |
448 | * Only do css_put(rg->css) when we delete the entire region | |
449 | * because one file_region must hold exactly one css reference. | |
450 | */ | |
451 | if (region_del) | |
452 | css_put(rg->css); | |
075a61d0 MA |
453 | } |
454 | } | |
455 | ||
71f87bee JW |
456 | enum { |
457 | RES_USAGE, | |
cdc2fcfe | 458 | RES_RSVD_USAGE, |
71f87bee | 459 | RES_LIMIT, |
cdc2fcfe | 460 | RES_RSVD_LIMIT, |
71f87bee | 461 | RES_MAX_USAGE, |
cdc2fcfe | 462 | RES_RSVD_MAX_USAGE, |
71f87bee | 463 | RES_FAILCNT, |
cdc2fcfe | 464 | RES_RSVD_FAILCNT, |
71f87bee JW |
465 | }; |
466 | ||
f4776199 MA |
467 | static int hugetlb_cgroup_read_numa_stat(struct seq_file *seq, void *dummy) |
468 | { | |
469 | int nid; | |
470 | struct cftype *cft = seq_cft(seq); | |
471 | int idx = MEMFILE_IDX(cft->private); | |
472 | bool legacy = MEMFILE_ATTR(cft->private); | |
473 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
474 | struct cgroup_subsys_state *css; | |
475 | unsigned long usage; | |
476 | ||
477 | if (legacy) { | |
478 | /* Add up usage across all nodes for the non-hierarchical total. */ | |
479 | usage = 0; | |
480 | for_each_node_state(nid, N_MEMORY) | |
481 | usage += READ_ONCE(h_cg->nodeinfo[nid]->usage[idx]); | |
482 | seq_printf(seq, "total=%lu", usage * PAGE_SIZE); | |
483 | ||
484 | /* Simply print the per-node usage for the non-hierarchical total. */ | |
485 | for_each_node_state(nid, N_MEMORY) | |
486 | seq_printf(seq, " N%d=%lu", nid, | |
487 | READ_ONCE(h_cg->nodeinfo[nid]->usage[idx]) * | |
488 | PAGE_SIZE); | |
489 | seq_putc(seq, '\n'); | |
490 | } | |
491 | ||
492 | /* | |
493 | * The hierarchical total is pretty much the value recorded by the | |
494 | * counter, so use that. | |
495 | */ | |
496 | seq_printf(seq, "%stotal=%lu", legacy ? "hierarchical_" : "", | |
497 | page_counter_read(&h_cg->hugepage[idx]) * PAGE_SIZE); | |
498 | ||
499 | /* | |
500 | * For each node, transverse the css tree to obtain the hierarchical | |
501 | * node usage. | |
502 | */ | |
503 | for_each_node_state(nid, N_MEMORY) { | |
504 | usage = 0; | |
505 | rcu_read_lock(); | |
506 | css_for_each_descendant_pre(css, &h_cg->css) { | |
507 | usage += READ_ONCE(hugetlb_cgroup_from_css(css) | |
508 | ->nodeinfo[nid] | |
509 | ->usage[idx]); | |
510 | } | |
511 | rcu_read_unlock(); | |
512 | seq_printf(seq, " N%d=%lu", nid, usage * PAGE_SIZE); | |
513 | } | |
514 | ||
515 | seq_putc(seq, '\n'); | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
716f479d TH |
520 | static u64 hugetlb_cgroup_read_u64(struct cgroup_subsys_state *css, |
521 | struct cftype *cft) | |
abb8206c | 522 | { |
71f87bee | 523 | struct page_counter *counter; |
cdc2fcfe | 524 | struct page_counter *rsvd_counter; |
182446d0 | 525 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(css); |
abb8206c | 526 | |
71f87bee | 527 | counter = &h_cg->hugepage[MEMFILE_IDX(cft->private)]; |
cdc2fcfe | 528 | rsvd_counter = &h_cg->rsvd_hugepage[MEMFILE_IDX(cft->private)]; |
abb8206c | 529 | |
71f87bee JW |
530 | switch (MEMFILE_ATTR(cft->private)) { |
531 | case RES_USAGE: | |
532 | return (u64)page_counter_read(counter) * PAGE_SIZE; | |
cdc2fcfe MA |
533 | case RES_RSVD_USAGE: |
534 | return (u64)page_counter_read(rsvd_counter) * PAGE_SIZE; | |
71f87bee | 535 | case RES_LIMIT: |
bbec2e15 | 536 | return (u64)counter->max * PAGE_SIZE; |
cdc2fcfe MA |
537 | case RES_RSVD_LIMIT: |
538 | return (u64)rsvd_counter->max * PAGE_SIZE; | |
71f87bee JW |
539 | case RES_MAX_USAGE: |
540 | return (u64)counter->watermark * PAGE_SIZE; | |
cdc2fcfe MA |
541 | case RES_RSVD_MAX_USAGE: |
542 | return (u64)rsvd_counter->watermark * PAGE_SIZE; | |
71f87bee JW |
543 | case RES_FAILCNT: |
544 | return counter->failcnt; | |
cdc2fcfe MA |
545 | case RES_RSVD_FAILCNT: |
546 | return rsvd_counter->failcnt; | |
71f87bee JW |
547 | default: |
548 | BUG(); | |
549 | } | |
abb8206c AK |
550 | } |
551 | ||
faced7e0 GS |
552 | static int hugetlb_cgroup_read_u64_max(struct seq_file *seq, void *v) |
553 | { | |
554 | int idx; | |
555 | u64 val; | |
556 | struct cftype *cft = seq_cft(seq); | |
557 | unsigned long limit; | |
558 | struct page_counter *counter; | |
559 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
560 | ||
561 | idx = MEMFILE_IDX(cft->private); | |
562 | counter = &h_cg->hugepage[idx]; | |
563 | ||
564 | limit = round_down(PAGE_COUNTER_MAX, | |
8938494c | 565 | pages_per_huge_page(&hstates[idx])); |
faced7e0 GS |
566 | |
567 | switch (MEMFILE_ATTR(cft->private)) { | |
cdc2fcfe MA |
568 | case RES_RSVD_USAGE: |
569 | counter = &h_cg->rsvd_hugepage[idx]; | |
e4a9bc58 | 570 | fallthrough; |
faced7e0 GS |
571 | case RES_USAGE: |
572 | val = (u64)page_counter_read(counter); | |
573 | seq_printf(seq, "%llu\n", val * PAGE_SIZE); | |
574 | break; | |
cdc2fcfe MA |
575 | case RES_RSVD_LIMIT: |
576 | counter = &h_cg->rsvd_hugepage[idx]; | |
e4a9bc58 | 577 | fallthrough; |
faced7e0 GS |
578 | case RES_LIMIT: |
579 | val = (u64)counter->max; | |
580 | if (val == limit) | |
581 | seq_puts(seq, "max\n"); | |
582 | else | |
583 | seq_printf(seq, "%llu\n", val * PAGE_SIZE); | |
584 | break; | |
585 | default: | |
586 | BUG(); | |
587 | } | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
71f87bee JW |
592 | static DEFINE_MUTEX(hugetlb_limit_mutex); |
593 | ||
451af504 | 594 | static ssize_t hugetlb_cgroup_write(struct kernfs_open_file *of, |
faced7e0 GS |
595 | char *buf, size_t nbytes, loff_t off, |
596 | const char *max) | |
abb8206c | 597 | { |
71f87bee JW |
598 | int ret, idx; |
599 | unsigned long nr_pages; | |
451af504 | 600 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(of_css(of)); |
cdc2fcfe | 601 | bool rsvd = false; |
abb8206c | 602 | |
71f87bee JW |
603 | if (hugetlb_cgroup_is_root(h_cg)) /* Can't set limit on root */ |
604 | return -EINVAL; | |
605 | ||
451af504 | 606 | buf = strstrip(buf); |
faced7e0 | 607 | ret = page_counter_memparse(buf, max, &nr_pages); |
71f87bee JW |
608 | if (ret) |
609 | return ret; | |
610 | ||
451af504 | 611 | idx = MEMFILE_IDX(of_cft(of)->private); |
8938494c | 612 | nr_pages = round_down(nr_pages, pages_per_huge_page(&hstates[idx])); |
abb8206c | 613 | |
71f87bee | 614 | switch (MEMFILE_ATTR(of_cft(of)->private)) { |
cdc2fcfe MA |
615 | case RES_RSVD_LIMIT: |
616 | rsvd = true; | |
e4a9bc58 | 617 | fallthrough; |
abb8206c | 618 | case RES_LIMIT: |
71f87bee | 619 | mutex_lock(&hugetlb_limit_mutex); |
cdc2fcfe | 620 | ret = page_counter_set_max( |
1adc4d41 | 621 | __hugetlb_cgroup_counter_from_cgroup(h_cg, idx, rsvd), |
cdc2fcfe | 622 | nr_pages); |
71f87bee | 623 | mutex_unlock(&hugetlb_limit_mutex); |
abb8206c AK |
624 | break; |
625 | default: | |
626 | ret = -EINVAL; | |
627 | break; | |
628 | } | |
451af504 | 629 | return ret ?: nbytes; |
abb8206c AK |
630 | } |
631 | ||
faced7e0 GS |
632 | static ssize_t hugetlb_cgroup_write_legacy(struct kernfs_open_file *of, |
633 | char *buf, size_t nbytes, loff_t off) | |
634 | { | |
635 | return hugetlb_cgroup_write(of, buf, nbytes, off, "-1"); | |
636 | } | |
637 | ||
638 | static ssize_t hugetlb_cgroup_write_dfl(struct kernfs_open_file *of, | |
639 | char *buf, size_t nbytes, loff_t off) | |
640 | { | |
641 | return hugetlb_cgroup_write(of, buf, nbytes, off, "max"); | |
642 | } | |
643 | ||
6770c64e TH |
644 | static ssize_t hugetlb_cgroup_reset(struct kernfs_open_file *of, |
645 | char *buf, size_t nbytes, loff_t off) | |
abb8206c | 646 | { |
71f87bee | 647 | int ret = 0; |
cdc2fcfe | 648 | struct page_counter *counter, *rsvd_counter; |
6770c64e | 649 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(of_css(of)); |
abb8206c | 650 | |
71f87bee | 651 | counter = &h_cg->hugepage[MEMFILE_IDX(of_cft(of)->private)]; |
cdc2fcfe | 652 | rsvd_counter = &h_cg->rsvd_hugepage[MEMFILE_IDX(of_cft(of)->private)]; |
abb8206c | 653 | |
71f87bee | 654 | switch (MEMFILE_ATTR(of_cft(of)->private)) { |
abb8206c | 655 | case RES_MAX_USAGE: |
71f87bee | 656 | page_counter_reset_watermark(counter); |
abb8206c | 657 | break; |
cdc2fcfe MA |
658 | case RES_RSVD_MAX_USAGE: |
659 | page_counter_reset_watermark(rsvd_counter); | |
660 | break; | |
abb8206c | 661 | case RES_FAILCNT: |
71f87bee | 662 | counter->failcnt = 0; |
abb8206c | 663 | break; |
cdc2fcfe MA |
664 | case RES_RSVD_FAILCNT: |
665 | rsvd_counter->failcnt = 0; | |
666 | break; | |
abb8206c AK |
667 | default: |
668 | ret = -EINVAL; | |
669 | break; | |
670 | } | |
6770c64e | 671 | return ret ?: nbytes; |
abb8206c AK |
672 | } |
673 | ||
674 | static char *mem_fmt(char *buf, int size, unsigned long hsize) | |
675 | { | |
abfb09e2 ML |
676 | if (hsize >= SZ_1G) |
677 | snprintf(buf, size, "%luGB", hsize / SZ_1G); | |
678 | else if (hsize >= SZ_1M) | |
679 | snprintf(buf, size, "%luMB", hsize / SZ_1M); | |
abb8206c | 680 | else |
abfb09e2 | 681 | snprintf(buf, size, "%luKB", hsize / SZ_1K); |
abb8206c AK |
682 | return buf; |
683 | } | |
684 | ||
faced7e0 GS |
685 | static int __hugetlb_events_show(struct seq_file *seq, bool local) |
686 | { | |
687 | int idx; | |
688 | long max; | |
689 | struct cftype *cft = seq_cft(seq); | |
690 | struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(seq_css(seq)); | |
691 | ||
692 | idx = MEMFILE_IDX(cft->private); | |
693 | ||
694 | if (local) | |
695 | max = atomic_long_read(&h_cg->events_local[idx][HUGETLB_MAX]); | |
696 | else | |
697 | max = atomic_long_read(&h_cg->events[idx][HUGETLB_MAX]); | |
698 | ||
699 | seq_printf(seq, "max %lu\n", max); | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
704 | static int hugetlb_events_show(struct seq_file *seq, void *v) | |
705 | { | |
706 | return __hugetlb_events_show(seq, false); | |
707 | } | |
708 | ||
709 | static int hugetlb_events_local_show(struct seq_file *seq, void *v) | |
710 | { | |
711 | return __hugetlb_events_show(seq, true); | |
712 | } | |
713 | ||
714 | static void __init __hugetlb_cgroup_file_dfl_init(int idx) | |
abb8206c AK |
715 | { |
716 | char buf[32]; | |
717 | struct cftype *cft; | |
718 | struct hstate *h = &hstates[idx]; | |
719 | ||
720 | /* format the size */ | |
cdc2fcfe | 721 | mem_fmt(buf, sizeof(buf), huge_page_size(h)); |
abb8206c AK |
722 | |
723 | /* Add the limit file */ | |
faced7e0 GS |
724 | cft = &h->cgroup_files_dfl[0]; |
725 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max", buf); | |
726 | cft->private = MEMFILE_PRIVATE(idx, RES_LIMIT); | |
727 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
728 | cft->write = hugetlb_cgroup_write_dfl; | |
729 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
730 | ||
cdc2fcfe | 731 | /* Add the reservation limit file */ |
faced7e0 | 732 | cft = &h->cgroup_files_dfl[1]; |
cdc2fcfe MA |
733 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.max", buf); |
734 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_LIMIT); | |
735 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
736 | cft->write = hugetlb_cgroup_write_dfl; | |
737 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
738 | ||
739 | /* Add the current usage file */ | |
740 | cft = &h->cgroup_files_dfl[2]; | |
faced7e0 GS |
741 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.current", buf); |
742 | cft->private = MEMFILE_PRIVATE(idx, RES_USAGE); | |
743 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
744 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
745 | ||
cdc2fcfe MA |
746 | /* Add the current reservation usage file */ |
747 | cft = &h->cgroup_files_dfl[3]; | |
748 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.current", buf); | |
749 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_USAGE); | |
750 | cft->seq_show = hugetlb_cgroup_read_u64_max; | |
751 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
752 | ||
faced7e0 | 753 | /* Add the events file */ |
cdc2fcfe | 754 | cft = &h->cgroup_files_dfl[4]; |
faced7e0 GS |
755 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events", buf); |
756 | cft->private = MEMFILE_PRIVATE(idx, 0); | |
757 | cft->seq_show = hugetlb_events_show; | |
d5a16959 | 758 | cft->file_offset = offsetof(struct hugetlb_cgroup, events_file[idx]); |
faced7e0 GS |
759 | cft->flags = CFTYPE_NOT_ON_ROOT; |
760 | ||
761 | /* Add the events.local file */ | |
cdc2fcfe | 762 | cft = &h->cgroup_files_dfl[5]; |
faced7e0 GS |
763 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events.local", buf); |
764 | cft->private = MEMFILE_PRIVATE(idx, 0); | |
765 | cft->seq_show = hugetlb_events_local_show; | |
766 | cft->file_offset = offsetof(struct hugetlb_cgroup, | |
d5a16959 | 767 | events_local_file[idx]); |
faced7e0 GS |
768 | cft->flags = CFTYPE_NOT_ON_ROOT; |
769 | ||
f4776199 | 770 | /* Add the numa stat file */ |
cdc2fcfe | 771 | cft = &h->cgroup_files_dfl[6]; |
f4776199 | 772 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf); |
2727cfe4 | 773 | cft->private = MEMFILE_PRIVATE(idx, 0); |
f4776199 MA |
774 | cft->seq_show = hugetlb_cgroup_read_numa_stat; |
775 | cft->flags = CFTYPE_NOT_ON_ROOT; | |
776 | ||
777 | /* NULL terminate the last cft */ | |
778 | cft = &h->cgroup_files_dfl[7]; | |
faced7e0 GS |
779 | memset(cft, 0, sizeof(*cft)); |
780 | ||
781 | WARN_ON(cgroup_add_dfl_cftypes(&hugetlb_cgrp_subsys, | |
782 | h->cgroup_files_dfl)); | |
783 | } | |
784 | ||
785 | static void __init __hugetlb_cgroup_file_legacy_init(int idx) | |
786 | { | |
787 | char buf[32]; | |
788 | struct cftype *cft; | |
789 | struct hstate *h = &hstates[idx]; | |
790 | ||
791 | /* format the size */ | |
cdc2fcfe | 792 | mem_fmt(buf, sizeof(buf), huge_page_size(h)); |
faced7e0 GS |
793 | |
794 | /* Add the limit file */ | |
795 | cft = &h->cgroup_files_legacy[0]; | |
abb8206c AK |
796 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.limit_in_bytes", buf); |
797 | cft->private = MEMFILE_PRIVATE(idx, RES_LIMIT); | |
716f479d | 798 | cft->read_u64 = hugetlb_cgroup_read_u64; |
faced7e0 | 799 | cft->write = hugetlb_cgroup_write_legacy; |
abb8206c | 800 | |
cdc2fcfe | 801 | /* Add the reservation limit file */ |
faced7e0 | 802 | cft = &h->cgroup_files_legacy[1]; |
cdc2fcfe MA |
803 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.limit_in_bytes", buf); |
804 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_LIMIT); | |
805 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
806 | cft->write = hugetlb_cgroup_write_legacy; | |
807 | ||
808 | /* Add the usage file */ | |
809 | cft = &h->cgroup_files_legacy[2]; | |
abb8206c AK |
810 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.usage_in_bytes", buf); |
811 | cft->private = MEMFILE_PRIVATE(idx, RES_USAGE); | |
716f479d | 812 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 813 | |
cdc2fcfe MA |
814 | /* Add the reservation usage file */ |
815 | cft = &h->cgroup_files_legacy[3]; | |
816 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.usage_in_bytes", buf); | |
817 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_USAGE); | |
818 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
819 | ||
abb8206c | 820 | /* Add the MAX usage file */ |
cdc2fcfe | 821 | cft = &h->cgroup_files_legacy[4]; |
abb8206c AK |
822 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max_usage_in_bytes", buf); |
823 | cft->private = MEMFILE_PRIVATE(idx, RES_MAX_USAGE); | |
6770c64e | 824 | cft->write = hugetlb_cgroup_reset; |
716f479d | 825 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 826 | |
cdc2fcfe MA |
827 | /* Add the MAX reservation usage file */ |
828 | cft = &h->cgroup_files_legacy[5]; | |
829 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.max_usage_in_bytes", buf); | |
830 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_MAX_USAGE); | |
831 | cft->write = hugetlb_cgroup_reset; | |
832 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
833 | ||
abb8206c | 834 | /* Add the failcntfile */ |
cdc2fcfe | 835 | cft = &h->cgroup_files_legacy[6]; |
abb8206c | 836 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.failcnt", buf); |
cdc2fcfe MA |
837 | cft->private = MEMFILE_PRIVATE(idx, RES_FAILCNT); |
838 | cft->write = hugetlb_cgroup_reset; | |
839 | cft->read_u64 = hugetlb_cgroup_read_u64; | |
840 | ||
841 | /* Add the reservation failcntfile */ | |
842 | cft = &h->cgroup_files_legacy[7]; | |
843 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.rsvd.failcnt", buf); | |
844 | cft->private = MEMFILE_PRIVATE(idx, RES_RSVD_FAILCNT); | |
6770c64e | 845 | cft->write = hugetlb_cgroup_reset; |
716f479d | 846 | cft->read_u64 = hugetlb_cgroup_read_u64; |
abb8206c | 847 | |
f4776199 | 848 | /* Add the numa stat file */ |
cdc2fcfe | 849 | cft = &h->cgroup_files_legacy[8]; |
f4776199 MA |
850 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.numa_stat", buf); |
851 | cft->private = MEMFILE_PRIVATE(idx, 1); | |
852 | cft->seq_show = hugetlb_cgroup_read_numa_stat; | |
853 | ||
854 | /* NULL terminate the last cft */ | |
855 | cft = &h->cgroup_files_legacy[9]; | |
abb8206c AK |
856 | memset(cft, 0, sizeof(*cft)); |
857 | ||
2cf669a5 | 858 | WARN_ON(cgroup_add_legacy_cftypes(&hugetlb_cgrp_subsys, |
faced7e0 GS |
859 | h->cgroup_files_legacy)); |
860 | } | |
861 | ||
862 | static void __init __hugetlb_cgroup_file_init(int idx) | |
863 | { | |
864 | __hugetlb_cgroup_file_dfl_init(idx); | |
865 | __hugetlb_cgroup_file_legacy_init(idx); | |
7179e7bf JW |
866 | } |
867 | ||
868 | void __init hugetlb_cgroup_file_init(void) | |
869 | { | |
870 | struct hstate *h; | |
871 | ||
872 | for_each_hstate(h) { | |
873 | /* | |
874 | * Add cgroup control files only if the huge page consists | |
875 | * of more than two normal pages. This is because we use | |
1d798ca3 | 876 | * page[2].private for storing cgroup details. |
7179e7bf JW |
877 | */ |
878 | if (huge_page_order(h) >= HUGETLB_CGROUP_MIN_ORDER) | |
879 | __hugetlb_cgroup_file_init(hstate_index(h)); | |
880 | } | |
abb8206c AK |
881 | } |
882 | ||
75754681 AK |
883 | /* |
884 | * hugetlb_lock will make sure a parallel cgroup rmdir won't happen | |
885 | * when we migrate hugepages | |
886 | */ | |
29f39430 | 887 | void hugetlb_cgroup_migrate(struct folio *old_folio, struct folio *new_folio) |
8e6ac7fa AK |
888 | { |
889 | struct hugetlb_cgroup *h_cg; | |
1adc4d41 | 890 | struct hugetlb_cgroup *h_cg_rsvd; |
29f39430 | 891 | struct hstate *h = folio_hstate(old_folio); |
8e6ac7fa AK |
892 | |
893 | if (hugetlb_cgroup_disabled()) | |
894 | return; | |
895 | ||
db71ef79 | 896 | spin_lock_irq(&hugetlb_lock); |
f074732d SK |
897 | h_cg = hugetlb_cgroup_from_folio(old_folio); |
898 | h_cg_rsvd = hugetlb_cgroup_from_folio_rsvd(old_folio); | |
de656ed3 SK |
899 | set_hugetlb_cgroup(old_folio, NULL); |
900 | set_hugetlb_cgroup_rsvd(old_folio, NULL); | |
8e6ac7fa AK |
901 | |
902 | /* move the h_cg details to new cgroup */ | |
de656ed3 SK |
903 | set_hugetlb_cgroup(new_folio, h_cg); |
904 | set_hugetlb_cgroup_rsvd(new_folio, h_cg_rsvd); | |
29f39430 | 905 | list_move(&new_folio->lru, &h->hugepage_activelist); |
db71ef79 | 906 | spin_unlock_irq(&hugetlb_lock); |
8e6ac7fa AK |
907 | return; |
908 | } | |
909 | ||
faced7e0 GS |
910 | static struct cftype hugetlb_files[] = { |
911 | {} /* terminate */ | |
912 | }; | |
913 | ||
073219e9 | 914 | struct cgroup_subsys hugetlb_cgrp_subsys = { |
92fb9748 TH |
915 | .css_alloc = hugetlb_cgroup_css_alloc, |
916 | .css_offline = hugetlb_cgroup_css_offline, | |
917 | .css_free = hugetlb_cgroup_css_free, | |
faced7e0 GS |
918 | .dfl_cftypes = hugetlb_files, |
919 | .legacy_cftypes = hugetlb_files, | |
2bc64a20 | 920 | }; |