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be6a0376 DV |
1 | /* |
2 | * Copyright © 2008-2015 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <linux/oom.h> | |
26 | #include <linux/shmem_fs.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/swap.h> | |
29 | #include <linux/pci.h> | |
30 | #include <linux/dma-buf.h> | |
e87666b5 | 31 | #include <linux/vmalloc.h> |
be6a0376 DV |
32 | #include <drm/drmP.h> |
33 | #include <drm/i915_drm.h> | |
34 | ||
35 | #include "i915_drv.h" | |
36 | #include "i915_trace.h" | |
37 | ||
38 | static bool mutex_is_locked_by(struct mutex *mutex, struct task_struct *task) | |
39 | { | |
40 | if (!mutex_is_locked(mutex)) | |
41 | return false; | |
42 | ||
4f074a53 | 43 | #if defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_MUTEX_SPIN_ON_OWNER) |
be6a0376 DV |
44 | return mutex->owner == task; |
45 | #else | |
46 | /* Since UP may be pre-empted, we cannot assume that we own the lock */ | |
47 | return false; | |
48 | #endif | |
49 | } | |
50 | ||
1233e2db CW |
51 | static bool i915_gem_shrinker_lock(struct drm_device *dev, bool *unlock) |
52 | { | |
53 | if (!mutex_trylock(&dev->struct_mutex)) { | |
54 | if (!mutex_is_locked_by(&dev->struct_mutex, current)) | |
55 | return false; | |
56 | ||
57 | *unlock = false; | |
58 | } else { | |
59 | *unlock = true; | |
60 | } | |
61 | ||
62 | return true; | |
63 | } | |
64 | ||
15717de2 | 65 | static bool any_vma_pinned(struct drm_i915_gem_object *obj) |
c1a415e2 CW |
66 | { |
67 | struct i915_vma *vma; | |
c1a415e2 | 68 | |
15717de2 | 69 | list_for_each_entry(vma, &obj->vma_list, obj_link) |
3272db53 | 70 | if (i915_vma_is_pinned(vma)) |
15717de2 | 71 | return true; |
c1a415e2 | 72 | |
15717de2 | 73 | return false; |
c1a415e2 CW |
74 | } |
75 | ||
76 | static bool swap_available(void) | |
77 | { | |
78 | return get_nr_swap_pages() > 0; | |
79 | } | |
80 | ||
81 | static bool can_release_pages(struct drm_i915_gem_object *obj) | |
82 | { | |
1233e2db CW |
83 | if (!obj->mm.pages) |
84 | return false; | |
85 | ||
1bec9b0b CW |
86 | /* Only shmemfs objects are backed by swap */ |
87 | if (!obj->base.filp) | |
88 | return false; | |
89 | ||
c1a415e2 CW |
90 | /* Only report true if by unbinding the object and putting its pages |
91 | * we can actually make forward progress towards freeing physical | |
92 | * pages. | |
93 | * | |
94 | * If the pages are pinned for any other reason than being bound | |
95 | * to the GPU, simply unbinding from the GPU is not going to succeed | |
96 | * in releasing our pin count on the pages themselves. | |
97 | */ | |
1233e2db | 98 | if (atomic_read(&obj->mm.pages_pin_count) > obj->bind_count) |
15717de2 CW |
99 | return false; |
100 | ||
101 | if (any_vma_pinned(obj)) | |
c1a415e2 CW |
102 | return false; |
103 | ||
104 | /* We can only return physical pages to the system if we can either | |
105 | * discard the contents (because the user has marked them as being | |
106 | * purgeable) or if we can move their contents out to swap. | |
107 | */ | |
a4f5ea64 | 108 | return swap_available() || obj->mm.madv == I915_MADV_DONTNEED; |
c1a415e2 CW |
109 | } |
110 | ||
03ac84f1 CW |
111 | static bool unsafe_drop_pages(struct drm_i915_gem_object *obj) |
112 | { | |
113 | if (i915_gem_object_unbind(obj) == 0) | |
114 | __i915_gem_object_put_pages(obj); | |
1233e2db | 115 | return !READ_ONCE(obj->mm.pages); |
03ac84f1 CW |
116 | } |
117 | ||
eb0b44ad DV |
118 | /** |
119 | * i915_gem_shrink - Shrink buffer object caches | |
120 | * @dev_priv: i915 device | |
121 | * @target: amount of memory to make available, in pages | |
122 | * @flags: control flags for selecting cache types | |
123 | * | |
124 | * This function is the main interface to the shrinker. It will try to release | |
125 | * up to @target pages of main memory backing storage from buffer objects. | |
126 | * Selection of the specific caches can be done with @flags. This is e.g. useful | |
127 | * when purgeable objects should be removed from caches preferentially. | |
128 | * | |
129 | * Note that it's not guaranteed that released amount is actually available as | |
130 | * free system memory - the pages might still be in-used to due to other reasons | |
131 | * (like cpu mmaps) or the mm core has reused them before we could grab them. | |
132 | * Therefore code that needs to explicitly shrink buffer objects caches (e.g. to | |
133 | * avoid deadlocks in memory reclaim) must fall back to i915_gem_shrink_all(). | |
134 | * | |
135 | * Also note that any kind of pinning (both per-vma address space pins and | |
136 | * backing storage pins at the buffer object level) result in the shrinker code | |
137 | * having to skip the object. | |
138 | * | |
139 | * Returns: | |
140 | * The number of pages of backing storage actually released. | |
141 | */ | |
be6a0376 DV |
142 | unsigned long |
143 | i915_gem_shrink(struct drm_i915_private *dev_priv, | |
14387540 | 144 | unsigned long target, unsigned flags) |
be6a0376 DV |
145 | { |
146 | const struct { | |
147 | struct list_head *list; | |
148 | unsigned int bit; | |
149 | } phases[] = { | |
150 | { &dev_priv->mm.unbound_list, I915_SHRINK_UNBOUND }, | |
151 | { &dev_priv->mm.bound_list, I915_SHRINK_BOUND }, | |
152 | { NULL, 0 }, | |
153 | }, *phase; | |
154 | unsigned long count = 0; | |
1233e2db CW |
155 | bool unlock; |
156 | ||
157 | if (!i915_gem_shrinker_lock(&dev_priv->drm, &unlock)) | |
158 | return 0; | |
be6a0376 | 159 | |
3abafa53 | 160 | trace_i915_gem_shrink(dev_priv, target, flags); |
c033666a | 161 | i915_gem_retire_requests(dev_priv); |
3abafa53 | 162 | |
178a30c9 PP |
163 | /* |
164 | * Unbinding of objects will require HW access; Let us not wake the | |
165 | * device just to recover a little memory. If absolutely necessary, | |
166 | * we will force the wake during oom-notifier. | |
167 | */ | |
168 | if ((flags & I915_SHRINK_BOUND) && | |
169 | !intel_runtime_pm_get_if_in_use(dev_priv)) | |
170 | flags &= ~I915_SHRINK_BOUND; | |
171 | ||
be6a0376 DV |
172 | /* |
173 | * As we may completely rewrite the (un)bound list whilst unbinding | |
174 | * (due to retiring requests) we have to strictly process only | |
175 | * one element of the list at the time, and recheck the list | |
176 | * on every iteration. | |
177 | * | |
178 | * In particular, we must hold a reference whilst removing the | |
179 | * object as we may end up waiting for and/or retiring the objects. | |
180 | * This might release the final reference (held by the active list) | |
181 | * and result in the object being freed from under us. This is | |
182 | * similar to the precautions the eviction code must take whilst | |
183 | * removing objects. | |
184 | * | |
185 | * Also note that although these lists do not hold a reference to | |
186 | * the object we can safely grab one here: The final object | |
187 | * unreferencing and the bound_list are both protected by the | |
188 | * dev->struct_mutex and so we won't ever be able to observe an | |
189 | * object on the bound_list with a reference count equals 0. | |
190 | */ | |
191 | for (phase = phases; phase->list; phase++) { | |
192 | struct list_head still_in_list; | |
2a1d7752 | 193 | struct drm_i915_gem_object *obj; |
be6a0376 DV |
194 | |
195 | if ((flags & phase->bit) == 0) | |
196 | continue; | |
197 | ||
198 | INIT_LIST_HEAD(&still_in_list); | |
2a1d7752 CW |
199 | while (count < target && |
200 | (obj = list_first_entry_or_null(phase->list, | |
201 | typeof(*obj), | |
202 | global_list))) { | |
be6a0376 | 203 | list_move_tail(&obj->global_list, &still_in_list); |
fbbd37b3 CW |
204 | if (!obj->mm.pages) { |
205 | list_del_init(&obj->global_list); | |
206 | continue; | |
207 | } | |
be6a0376 DV |
208 | |
209 | if (flags & I915_SHRINK_PURGEABLE && | |
a4f5ea64 | 210 | obj->mm.madv != I915_MADV_DONTNEED) |
be6a0376 DV |
211 | continue; |
212 | ||
eae2c43b | 213 | if (flags & I915_SHRINK_VMAPS && |
a4f5ea64 | 214 | !is_vmalloc_addr(obj->mm.mapping)) |
eae2c43b CW |
215 | continue; |
216 | ||
45353ce5 CW |
217 | if (!(flags & I915_SHRINK_ACTIVE) && |
218 | (i915_gem_object_is_active(obj) || | |
219 | obj->framebuffer_references)) | |
5763ff04 CW |
220 | continue; |
221 | ||
c1a415e2 CW |
222 | if (!can_release_pages(obj)) |
223 | continue; | |
224 | ||
1233e2db | 225 | if (unsafe_drop_pages(obj)) { |
7b7a119e CW |
226 | /* May arrive from get_pages on another bo */ |
227 | mutex_lock_nested(&obj->mm.lock, | |
228 | SINGLE_DEPTH_NESTING); | |
1233e2db CW |
229 | if (!obj->mm.pages) { |
230 | __i915_gem_object_invalidate(obj); | |
41598162 | 231 | list_del_init(&obj->global_list); |
1233e2db CW |
232 | count += obj->base.size >> PAGE_SHIFT; |
233 | } | |
234 | mutex_unlock(&obj->mm.lock); | |
235 | } | |
be6a0376 DV |
236 | } |
237 | list_splice(&still_in_list, phase->list); | |
238 | } | |
239 | ||
178a30c9 PP |
240 | if (flags & I915_SHRINK_BOUND) |
241 | intel_runtime_pm_put(dev_priv); | |
242 | ||
c033666a | 243 | i915_gem_retire_requests(dev_priv); |
1233e2db CW |
244 | if (unlock) |
245 | mutex_unlock(&dev_priv->drm.struct_mutex); | |
246 | ||
0eafec6d CW |
247 | /* expedite the RCU grace period to free some request slabs */ |
248 | synchronize_rcu_expedited(); | |
c9c0f5ea | 249 | |
be6a0376 DV |
250 | return count; |
251 | } | |
252 | ||
eb0b44ad | 253 | /** |
1f2449cd | 254 | * i915_gem_shrink_all - Shrink buffer object caches completely |
eb0b44ad DV |
255 | * @dev_priv: i915 device |
256 | * | |
257 | * This is a simple wraper around i915_gem_shrink() to aggressively shrink all | |
258 | * caches completely. It also first waits for and retires all outstanding | |
259 | * requests to also be able to release backing storage for active objects. | |
260 | * | |
261 | * This should only be used in code to intentionally quiescent the gpu or as a | |
262 | * last-ditch effort when memory seems to have run out. | |
263 | * | |
264 | * Returns: | |
265 | * The number of pages of backing storage actually released. | |
266 | */ | |
be6a0376 DV |
267 | unsigned long i915_gem_shrink_all(struct drm_i915_private *dev_priv) |
268 | { | |
0eafec6d CW |
269 | unsigned long freed; |
270 | ||
271 | freed = i915_gem_shrink(dev_priv, -1UL, | |
272 | I915_SHRINK_BOUND | | |
273 | I915_SHRINK_UNBOUND | | |
274 | I915_SHRINK_ACTIVE); | |
275 | rcu_barrier(); /* wait until our RCU delayed slab frees are completed */ | |
276 | ||
277 | return freed; | |
be6a0376 DV |
278 | } |
279 | ||
be6a0376 DV |
280 | static unsigned long |
281 | i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) | |
282 | { | |
283 | struct drm_i915_private *dev_priv = | |
284 | container_of(shrinker, struct drm_i915_private, mm.shrinker); | |
91c8a326 | 285 | struct drm_device *dev = &dev_priv->drm; |
be6a0376 DV |
286 | struct drm_i915_gem_object *obj; |
287 | unsigned long count; | |
288 | bool unlock; | |
289 | ||
290 | if (!i915_gem_shrinker_lock(dev, &unlock)) | |
291 | return 0; | |
292 | ||
bed50aea CW |
293 | i915_gem_retire_requests(dev_priv); |
294 | ||
be6a0376 DV |
295 | count = 0; |
296 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list) | |
6f0ac204 | 297 | if (can_release_pages(obj)) |
be6a0376 DV |
298 | count += obj->base.size >> PAGE_SHIFT; |
299 | ||
300 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) { | |
573adb39 | 301 | if (!i915_gem_object_is_active(obj) && can_release_pages(obj)) |
be6a0376 DV |
302 | count += obj->base.size >> PAGE_SHIFT; |
303 | } | |
304 | ||
305 | if (unlock) | |
306 | mutex_unlock(&dev->struct_mutex); | |
307 | ||
308 | return count; | |
309 | } | |
310 | ||
311 | static unsigned long | |
312 | i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) | |
313 | { | |
314 | struct drm_i915_private *dev_priv = | |
315 | container_of(shrinker, struct drm_i915_private, mm.shrinker); | |
91c8a326 | 316 | struct drm_device *dev = &dev_priv->drm; |
be6a0376 DV |
317 | unsigned long freed; |
318 | bool unlock; | |
319 | ||
320 | if (!i915_gem_shrinker_lock(dev, &unlock)) | |
321 | return SHRINK_STOP; | |
322 | ||
323 | freed = i915_gem_shrink(dev_priv, | |
324 | sc->nr_to_scan, | |
325 | I915_SHRINK_BOUND | | |
326 | I915_SHRINK_UNBOUND | | |
327 | I915_SHRINK_PURGEABLE); | |
328 | if (freed < sc->nr_to_scan) | |
329 | freed += i915_gem_shrink(dev_priv, | |
330 | sc->nr_to_scan - freed, | |
331 | I915_SHRINK_BOUND | | |
332 | I915_SHRINK_UNBOUND); | |
333 | if (unlock) | |
334 | mutex_unlock(&dev->struct_mutex); | |
335 | ||
336 | return freed; | |
337 | } | |
338 | ||
168cf367 CW |
339 | struct shrinker_lock_uninterruptible { |
340 | bool was_interruptible; | |
341 | bool unlock; | |
342 | }; | |
343 | ||
344 | static bool | |
345 | i915_gem_shrinker_lock_uninterruptible(struct drm_i915_private *dev_priv, | |
346 | struct shrinker_lock_uninterruptible *slu, | |
347 | int timeout_ms) | |
348 | { | |
5cba5be6 CW |
349 | unsigned long timeout = jiffies + msecs_to_jiffies_timeout(timeout_ms); |
350 | ||
351 | do { | |
ea746f36 | 352 | if (i915_gem_wait_for_idle(dev_priv, 0) == 0 && |
5cba5be6 CW |
353 | i915_gem_shrinker_lock(&dev_priv->drm, &slu->unlock)) |
354 | break; | |
168cf367 | 355 | |
168cf367 CW |
356 | schedule_timeout_killable(1); |
357 | if (fatal_signal_pending(current)) | |
358 | return false; | |
5cba5be6 CW |
359 | |
360 | if (time_after(jiffies, timeout)) { | |
168cf367 CW |
361 | pr_err("Unable to lock GPU to purge memory.\n"); |
362 | return false; | |
363 | } | |
5cba5be6 | 364 | } while (1); |
168cf367 CW |
365 | |
366 | slu->was_interruptible = dev_priv->mm.interruptible; | |
367 | dev_priv->mm.interruptible = false; | |
368 | return true; | |
369 | } | |
370 | ||
371 | static void | |
372 | i915_gem_shrinker_unlock_uninterruptible(struct drm_i915_private *dev_priv, | |
373 | struct shrinker_lock_uninterruptible *slu) | |
374 | { | |
375 | dev_priv->mm.interruptible = slu->was_interruptible; | |
376 | if (slu->unlock) | |
91c8a326 | 377 | mutex_unlock(&dev_priv->drm.struct_mutex); |
168cf367 CW |
378 | } |
379 | ||
be6a0376 DV |
380 | static int |
381 | i915_gem_shrinker_oom(struct notifier_block *nb, unsigned long event, void *ptr) | |
382 | { | |
383 | struct drm_i915_private *dev_priv = | |
384 | container_of(nb, struct drm_i915_private, mm.oom_notifier); | |
168cf367 | 385 | struct shrinker_lock_uninterruptible slu; |
be6a0376 | 386 | struct drm_i915_gem_object *obj; |
1768d455 | 387 | unsigned long unevictable, bound, unbound, freed_pages; |
be6a0376 | 388 | |
168cf367 | 389 | if (!i915_gem_shrinker_lock_uninterruptible(dev_priv, &slu, 5000)) |
be6a0376 | 390 | return NOTIFY_DONE; |
be6a0376 | 391 | |
ea9d9768 | 392 | intel_runtime_pm_get(dev_priv); |
be6a0376 | 393 | freed_pages = i915_gem_shrink_all(dev_priv); |
ea9d9768 | 394 | intel_runtime_pm_put(dev_priv); |
be6a0376 | 395 | |
be6a0376 DV |
396 | /* Because we may be allocating inside our own driver, we cannot |
397 | * assert that there are no objects with pinned pages that are not | |
398 | * being pointed to by hardware. | |
399 | */ | |
1768d455 | 400 | unbound = bound = unevictable = 0; |
be6a0376 | 401 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list) { |
fbbd37b3 CW |
402 | if (!obj->mm.pages) |
403 | continue; | |
404 | ||
1768d455 CW |
405 | if (!can_release_pages(obj)) |
406 | unevictable += obj->base.size >> PAGE_SHIFT; | |
be6a0376 | 407 | else |
1768d455 | 408 | unbound += obj->base.size >> PAGE_SHIFT; |
be6a0376 DV |
409 | } |
410 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) { | |
fbbd37b3 CW |
411 | if (!obj->mm.pages) |
412 | continue; | |
413 | ||
1768d455 CW |
414 | if (!can_release_pages(obj)) |
415 | unevictable += obj->base.size >> PAGE_SHIFT; | |
be6a0376 | 416 | else |
1768d455 | 417 | bound += obj->base.size >> PAGE_SHIFT; |
be6a0376 DV |
418 | } |
419 | ||
168cf367 | 420 | i915_gem_shrinker_unlock_uninterruptible(dev_priv, &slu); |
be6a0376 DV |
421 | |
422 | if (freed_pages || unbound || bound) | |
1768d455 CW |
423 | pr_info("Purging GPU memory, %lu pages freed, " |
424 | "%lu pages still pinned.\n", | |
425 | freed_pages, unevictable); | |
be6a0376 | 426 | if (unbound || bound) |
1768d455 | 427 | pr_err("%lu and %lu pages still available in the " |
be6a0376 DV |
428 | "bound and unbound GPU page lists.\n", |
429 | bound, unbound); | |
430 | ||
431 | *(unsigned long *)ptr += freed_pages; | |
432 | return NOTIFY_DONE; | |
433 | } | |
434 | ||
e87666b5 CW |
435 | static int |
436 | i915_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) | |
437 | { | |
438 | struct drm_i915_private *dev_priv = | |
439 | container_of(nb, struct drm_i915_private, mm.vmap_notifier); | |
168cf367 | 440 | struct shrinker_lock_uninterruptible slu; |
8ef8561f CW |
441 | struct i915_vma *vma, *next; |
442 | unsigned long freed_pages = 0; | |
443 | int ret; | |
e87666b5 | 444 | |
168cf367 | 445 | if (!i915_gem_shrinker_lock_uninterruptible(dev_priv, &slu, 5000)) |
e87666b5 | 446 | return NOTIFY_DONE; |
e87666b5 | 447 | |
8ef8561f | 448 | /* Force everything onto the inactive lists */ |
22dd3bb9 | 449 | ret = i915_gem_wait_for_idle(dev_priv, I915_WAIT_LOCKED); |
8ef8561f CW |
450 | if (ret) |
451 | goto out; | |
452 | ||
ea9d9768 | 453 | intel_runtime_pm_get(dev_priv); |
8ef8561f CW |
454 | freed_pages += i915_gem_shrink(dev_priv, -1UL, |
455 | I915_SHRINK_BOUND | | |
456 | I915_SHRINK_UNBOUND | | |
457 | I915_SHRINK_ACTIVE | | |
458 | I915_SHRINK_VMAPS); | |
ea9d9768 | 459 | intel_runtime_pm_put(dev_priv); |
8ef8561f CW |
460 | |
461 | /* We also want to clear any cached iomaps as they wrap vmap */ | |
462 | list_for_each_entry_safe(vma, next, | |
463 | &dev_priv->ggtt.base.inactive_list, vm_link) { | |
464 | unsigned long count = vma->node.size >> PAGE_SHIFT; | |
465 | if (vma->iomap && i915_vma_unbind(vma) == 0) | |
466 | freed_pages += count; | |
467 | } | |
e87666b5 | 468 | |
8ef8561f | 469 | out: |
168cf367 | 470 | i915_gem_shrinker_unlock_uninterruptible(dev_priv, &slu); |
e87666b5 CW |
471 | |
472 | *(unsigned long *)ptr += freed_pages; | |
473 | return NOTIFY_DONE; | |
474 | } | |
475 | ||
eb0b44ad DV |
476 | /** |
477 | * i915_gem_shrinker_init - Initialize i915 shrinker | |
478 | * @dev_priv: i915 device | |
479 | * | |
480 | * This function registers and sets up the i915 shrinker and OOM handler. | |
481 | */ | |
be6a0376 DV |
482 | void i915_gem_shrinker_init(struct drm_i915_private *dev_priv) |
483 | { | |
484 | dev_priv->mm.shrinker.scan_objects = i915_gem_shrinker_scan; | |
485 | dev_priv->mm.shrinker.count_objects = i915_gem_shrinker_count; | |
486 | dev_priv->mm.shrinker.seeks = DEFAULT_SEEKS; | |
a8a40589 | 487 | WARN_ON(register_shrinker(&dev_priv->mm.shrinker)); |
be6a0376 DV |
488 | |
489 | dev_priv->mm.oom_notifier.notifier_call = i915_gem_shrinker_oom; | |
a8a40589 | 490 | WARN_ON(register_oom_notifier(&dev_priv->mm.oom_notifier)); |
e87666b5 CW |
491 | |
492 | dev_priv->mm.vmap_notifier.notifier_call = i915_gem_shrinker_vmap; | |
493 | WARN_ON(register_vmap_purge_notifier(&dev_priv->mm.vmap_notifier)); | |
a8a40589 ID |
494 | } |
495 | ||
496 | /** | |
497 | * i915_gem_shrinker_cleanup - Clean up i915 shrinker | |
498 | * @dev_priv: i915 device | |
499 | * | |
500 | * This function unregisters the i915 shrinker and OOM handler. | |
501 | */ | |
502 | void i915_gem_shrinker_cleanup(struct drm_i915_private *dev_priv) | |
503 | { | |
e87666b5 | 504 | WARN_ON(unregister_vmap_purge_notifier(&dev_priv->mm.vmap_notifier)); |
a8a40589 ID |
505 | WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier)); |
506 | unregister_shrinker(&dev_priv->mm.shrinker); | |
be6a0376 | 507 | } |