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Commit | Line | Data |
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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 | ||
9439b371 | 38 | static bool i915_gem_shrinker_lock(struct drm_device *dev, bool *unlock) |
be6a0376 | 39 | { |
9439b371 LT |
40 | switch (mutex_trylock_recursive(&dev->struct_mutex)) { |
41 | case MUTEX_TRYLOCK_FAILED: | |
be6a0376 DV |
42 | return false; |
43 | ||
9439b371 LT |
44 | case MUTEX_TRYLOCK_SUCCESS: |
45 | *unlock = true; | |
46 | return true; | |
1233e2db | 47 | |
9439b371 | 48 | case MUTEX_TRYLOCK_RECURSIVE: |
1233e2db | 49 | *unlock = false; |
9439b371 | 50 | return true; |
1233e2db CW |
51 | } |
52 | ||
9439b371 | 53 | BUG(); |
1233e2db CW |
54 | } |
55 | ||
c053b5a5 JL |
56 | static void i915_gem_shrinker_unlock(struct drm_device *dev, bool unlock) |
57 | { | |
58 | if (!unlock) | |
59 | return; | |
60 | ||
61 | mutex_unlock(&dev->struct_mutex); | |
c053b5a5 JL |
62 | } |
63 | ||
15717de2 | 64 | static bool any_vma_pinned(struct drm_i915_gem_object *obj) |
c1a415e2 CW |
65 | { |
66 | struct i915_vma *vma; | |
c1a415e2 | 67 | |
15717de2 | 68 | list_for_each_entry(vma, &obj->vma_list, obj_link) |
3272db53 | 69 | if (i915_vma_is_pinned(vma)) |
15717de2 | 70 | return true; |
c1a415e2 | 71 | |
15717de2 | 72 | return false; |
c1a415e2 CW |
73 | } |
74 | ||
75 | static bool swap_available(void) | |
76 | { | |
77 | return get_nr_swap_pages() > 0; | |
78 | } | |
79 | ||
80 | static bool can_release_pages(struct drm_i915_gem_object *obj) | |
81 | { | |
1233e2db CW |
82 | if (!obj->mm.pages) |
83 | return false; | |
84 | ||
3599a91c TU |
85 | /* Consider only shrinkable ojects. */ |
86 | if (!i915_gem_object_is_shrinkable(obj)) | |
1bec9b0b CW |
87 | return false; |
88 | ||
c1a415e2 CW |
89 | /* Only report true if by unbinding the object and putting its pages |
90 | * we can actually make forward progress towards freeing physical | |
91 | * pages. | |
92 | * | |
93 | * If the pages are pinned for any other reason than being bound | |
94 | * to the GPU, simply unbinding from the GPU is not going to succeed | |
95 | * in releasing our pin count on the pages themselves. | |
96 | */ | |
1233e2db | 97 | if (atomic_read(&obj->mm.pages_pin_count) > obj->bind_count) |
15717de2 CW |
98 | return false; |
99 | ||
100 | if (any_vma_pinned(obj)) | |
c1a415e2 CW |
101 | return false; |
102 | ||
103 | /* We can only return physical pages to the system if we can either | |
104 | * discard the contents (because the user has marked them as being | |
105 | * purgeable) or if we can move their contents out to swap. | |
106 | */ | |
a4f5ea64 | 107 | return swap_available() || obj->mm.madv == I915_MADV_DONTNEED; |
c1a415e2 CW |
108 | } |
109 | ||
03ac84f1 CW |
110 | static bool unsafe_drop_pages(struct drm_i915_gem_object *obj) |
111 | { | |
112 | if (i915_gem_object_unbind(obj) == 0) | |
548625ee | 113 | __i915_gem_object_put_pages(obj, I915_MM_SHRINKER); |
1233e2db | 114 | return !READ_ONCE(obj->mm.pages); |
c1a415e2 CW |
115 | } |
116 | ||
eb0b44ad DV |
117 | /** |
118 | * i915_gem_shrink - Shrink buffer object caches | |
119 | * @dev_priv: i915 device | |
120 | * @target: amount of memory to make available, in pages | |
121 | * @flags: control flags for selecting cache types | |
122 | * | |
123 | * This function is the main interface to the shrinker. It will try to release | |
124 | * up to @target pages of main memory backing storage from buffer objects. | |
125 | * Selection of the specific caches can be done with @flags. This is e.g. useful | |
126 | * when purgeable objects should be removed from caches preferentially. | |
127 | * | |
128 | * Note that it's not guaranteed that released amount is actually available as | |
129 | * free system memory - the pages might still be in-used to due to other reasons | |
130 | * (like cpu mmaps) or the mm core has reused them before we could grab them. | |
131 | * Therefore code that needs to explicitly shrink buffer objects caches (e.g. to | |
132 | * avoid deadlocks in memory reclaim) must fall back to i915_gem_shrink_all(). | |
133 | * | |
134 | * Also note that any kind of pinning (both per-vma address space pins and | |
135 | * backing storage pins at the buffer object level) result in the shrinker code | |
136 | * having to skip the object. | |
137 | * | |
138 | * Returns: | |
139 | * The number of pages of backing storage actually released. | |
140 | */ | |
be6a0376 DV |
141 | unsigned long |
142 | i915_gem_shrink(struct drm_i915_private *dev_priv, | |
14387540 | 143 | unsigned long target, unsigned flags) |
be6a0376 DV |
144 | { |
145 | const struct { | |
146 | struct list_head *list; | |
147 | unsigned int bit; | |
148 | } phases[] = { | |
149 | { &dev_priv->mm.unbound_list, I915_SHRINK_UNBOUND }, | |
150 | { &dev_priv->mm.bound_list, I915_SHRINK_BOUND }, | |
151 | { NULL, 0 }, | |
152 | }, *phase; | |
153 | unsigned long count = 0; | |
1233e2db CW |
154 | bool unlock; |
155 | ||
156 | if (!i915_gem_shrinker_lock(&dev_priv->drm, &unlock)) | |
157 | return 0; | |
be6a0376 | 158 | |
3abafa53 | 159 | trace_i915_gem_shrink(dev_priv, target, flags); |
c033666a | 160 | i915_gem_retire_requests(dev_priv); |
3abafa53 | 161 | |
178a30c9 PP |
162 | /* |
163 | * Unbinding of objects will require HW access; Let us not wake the | |
164 | * device just to recover a little memory. If absolutely necessary, | |
165 | * we will force the wake during oom-notifier. | |
166 | */ | |
167 | if ((flags & I915_SHRINK_BOUND) && | |
168 | !intel_runtime_pm_get_if_in_use(dev_priv)) | |
169 | flags &= ~I915_SHRINK_BOUND; | |
170 | ||
be6a0376 DV |
171 | /* |
172 | * As we may completely rewrite the (un)bound list whilst unbinding | |
173 | * (due to retiring requests) we have to strictly process only | |
174 | * one element of the list at the time, and recheck the list | |
175 | * on every iteration. | |
176 | * | |
177 | * In particular, we must hold a reference whilst removing the | |
178 | * object as we may end up waiting for and/or retiring the objects. | |
179 | * This might release the final reference (held by the active list) | |
180 | * and result in the object being freed from under us. This is | |
181 | * similar to the precautions the eviction code must take whilst | |
182 | * removing objects. | |
183 | * | |
184 | * Also note that although these lists do not hold a reference to | |
185 | * the object we can safely grab one here: The final object | |
186 | * unreferencing and the bound_list are both protected by the | |
187 | * dev->struct_mutex and so we won't ever be able to observe an | |
188 | * object on the bound_list with a reference count equals 0. | |
189 | */ | |
190 | for (phase = phases; phase->list; phase++) { | |
191 | struct list_head still_in_list; | |
2a1d7752 | 192 | struct drm_i915_gem_object *obj; |
be6a0376 DV |
193 | |
194 | if ((flags & phase->bit) == 0) | |
195 | continue; | |
196 | ||
197 | INIT_LIST_HEAD(&still_in_list); | |
2a1d7752 CW |
198 | while (count < target && |
199 | (obj = list_first_entry_or_null(phase->list, | |
200 | typeof(*obj), | |
56cea323 JL |
201 | global_link))) { |
202 | list_move_tail(&obj->global_link, &still_in_list); | |
fbbd37b3 | 203 | if (!obj->mm.pages) { |
56cea323 | 204 | list_del_init(&obj->global_link); |
fbbd37b3 CW |
205 | continue; |
206 | } | |
be6a0376 DV |
207 | |
208 | if (flags & I915_SHRINK_PURGEABLE && | |
a4f5ea64 | 209 | obj->mm.madv != I915_MADV_DONTNEED) |
be6a0376 DV |
210 | continue; |
211 | ||
eae2c43b | 212 | if (flags & I915_SHRINK_VMAPS && |
a4f5ea64 | 213 | !is_vmalloc_addr(obj->mm.mapping)) |
eae2c43b CW |
214 | continue; |
215 | ||
45353ce5 CW |
216 | if (!(flags & I915_SHRINK_ACTIVE) && |
217 | (i915_gem_object_is_active(obj) || | |
dd689287 | 218 | i915_gem_object_is_framebuffer(obj))) |
5763ff04 CW |
219 | continue; |
220 | ||
c1a415e2 CW |
221 | if (!can_release_pages(obj)) |
222 | continue; | |
223 | ||
1233e2db | 224 | if (unsafe_drop_pages(obj)) { |
7b7a119e CW |
225 | /* May arrive from get_pages on another bo */ |
226 | mutex_lock_nested(&obj->mm.lock, | |
548625ee | 227 | I915_MM_SHRINKER); |
1233e2db CW |
228 | if (!obj->mm.pages) { |
229 | __i915_gem_object_invalidate(obj); | |
56cea323 | 230 | list_del_init(&obj->global_link); |
1233e2db CW |
231 | count += obj->base.size >> PAGE_SHIFT; |
232 | } | |
233 | mutex_unlock(&obj->mm.lock); | |
234 | } | |
be6a0376 | 235 | } |
53597277 | 236 | list_splice_tail(&still_in_list, phase->list); |
be6a0376 DV |
237 | } |
238 | ||
178a30c9 PP |
239 | if (flags & I915_SHRINK_BOUND) |
240 | intel_runtime_pm_put(dev_priv); | |
241 | ||
c033666a | 242 | i915_gem_retire_requests(dev_priv); |
1233e2db | 243 | |
c053b5a5 | 244 | i915_gem_shrinker_unlock(&dev_priv->drm, unlock); |
c9c0f5ea | 245 | |
be6a0376 DV |
246 | return count; |
247 | } | |
248 | ||
eb0b44ad | 249 | /** |
1f2449cd | 250 | * i915_gem_shrink_all - Shrink buffer object caches completely |
eb0b44ad DV |
251 | * @dev_priv: i915 device |
252 | * | |
253 | * This is a simple wraper around i915_gem_shrink() to aggressively shrink all | |
254 | * caches completely. It also first waits for and retires all outstanding | |
255 | * requests to also be able to release backing storage for active objects. | |
256 | * | |
257 | * This should only be used in code to intentionally quiescent the gpu or as a | |
258 | * last-ditch effort when memory seems to have run out. | |
259 | * | |
260 | * Returns: | |
261 | * The number of pages of backing storage actually released. | |
262 | */ | |
be6a0376 DV |
263 | unsigned long i915_gem_shrink_all(struct drm_i915_private *dev_priv) |
264 | { | |
0eafec6d CW |
265 | unsigned long freed; |
266 | ||
519d5249 | 267 | intel_runtime_pm_get(dev_priv); |
0eafec6d CW |
268 | freed = i915_gem_shrink(dev_priv, -1UL, |
269 | I915_SHRINK_BOUND | | |
270 | I915_SHRINK_UNBOUND | | |
271 | I915_SHRINK_ACTIVE); | |
519d5249 CW |
272 | intel_runtime_pm_put(dev_priv); |
273 | ||
0eafec6d | 274 | return freed; |
be6a0376 DV |
275 | } |
276 | ||
be6a0376 DV |
277 | static unsigned long |
278 | i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) | |
279 | { | |
280 | struct drm_i915_private *dev_priv = | |
281 | container_of(shrinker, struct drm_i915_private, mm.shrinker); | |
91c8a326 | 282 | struct drm_device *dev = &dev_priv->drm; |
be6a0376 DV |
283 | struct drm_i915_gem_object *obj; |
284 | unsigned long count; | |
285 | bool unlock; | |
286 | ||
287 | if (!i915_gem_shrinker_lock(dev, &unlock)) | |
288 | return 0; | |
289 | ||
bed50aea CW |
290 | i915_gem_retire_requests(dev_priv); |
291 | ||
be6a0376 | 292 | count = 0; |
56cea323 | 293 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_link) |
6f0ac204 | 294 | if (can_release_pages(obj)) |
be6a0376 DV |
295 | count += obj->base.size >> PAGE_SHIFT; |
296 | ||
56cea323 | 297 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_link) { |
573adb39 | 298 | if (!i915_gem_object_is_active(obj) && can_release_pages(obj)) |
be6a0376 DV |
299 | count += obj->base.size >> PAGE_SHIFT; |
300 | } | |
301 | ||
c053b5a5 | 302 | i915_gem_shrinker_unlock(dev, unlock); |
be6a0376 DV |
303 | |
304 | return count; | |
305 | } | |
306 | ||
307 | static unsigned long | |
308 | i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) | |
309 | { | |
310 | struct drm_i915_private *dev_priv = | |
311 | container_of(shrinker, struct drm_i915_private, mm.shrinker); | |
91c8a326 | 312 | struct drm_device *dev = &dev_priv->drm; |
be6a0376 DV |
313 | unsigned long freed; |
314 | bool unlock; | |
315 | ||
316 | if (!i915_gem_shrinker_lock(dev, &unlock)) | |
317 | return SHRINK_STOP; | |
318 | ||
319 | freed = i915_gem_shrink(dev_priv, | |
320 | sc->nr_to_scan, | |
321 | I915_SHRINK_BOUND | | |
322 | I915_SHRINK_UNBOUND | | |
323 | I915_SHRINK_PURGEABLE); | |
324 | if (freed < sc->nr_to_scan) | |
325 | freed += i915_gem_shrink(dev_priv, | |
326 | sc->nr_to_scan - freed, | |
327 | I915_SHRINK_BOUND | | |
328 | I915_SHRINK_UNBOUND); | |
c053b5a5 JL |
329 | |
330 | i915_gem_shrinker_unlock(dev, unlock); | |
be6a0376 DV |
331 | |
332 | return freed; | |
333 | } | |
334 | ||
168cf367 CW |
335 | struct shrinker_lock_uninterruptible { |
336 | bool was_interruptible; | |
337 | bool unlock; | |
338 | }; | |
339 | ||
340 | static bool | |
341 | i915_gem_shrinker_lock_uninterruptible(struct drm_i915_private *dev_priv, | |
342 | struct shrinker_lock_uninterruptible *slu, | |
343 | int timeout_ms) | |
344 | { | |
5cba5be6 CW |
345 | unsigned long timeout = jiffies + msecs_to_jiffies_timeout(timeout_ms); |
346 | ||
347 | do { | |
ea746f36 | 348 | if (i915_gem_wait_for_idle(dev_priv, 0) == 0 && |
5cba5be6 CW |
349 | i915_gem_shrinker_lock(&dev_priv->drm, &slu->unlock)) |
350 | break; | |
168cf367 | 351 | |
168cf367 CW |
352 | schedule_timeout_killable(1); |
353 | if (fatal_signal_pending(current)) | |
354 | return false; | |
5cba5be6 CW |
355 | |
356 | if (time_after(jiffies, timeout)) { | |
168cf367 CW |
357 | pr_err("Unable to lock GPU to purge memory.\n"); |
358 | return false; | |
359 | } | |
5cba5be6 | 360 | } while (1); |
168cf367 CW |
361 | |
362 | slu->was_interruptible = dev_priv->mm.interruptible; | |
363 | dev_priv->mm.interruptible = false; | |
364 | return true; | |
365 | } | |
366 | ||
367 | static void | |
368 | i915_gem_shrinker_unlock_uninterruptible(struct drm_i915_private *dev_priv, | |
369 | struct shrinker_lock_uninterruptible *slu) | |
370 | { | |
371 | dev_priv->mm.interruptible = slu->was_interruptible; | |
c053b5a5 | 372 | i915_gem_shrinker_unlock(&dev_priv->drm, slu->unlock); |
168cf367 CW |
373 | } |
374 | ||
be6a0376 DV |
375 | static int |
376 | i915_gem_shrinker_oom(struct notifier_block *nb, unsigned long event, void *ptr) | |
377 | { | |
378 | struct drm_i915_private *dev_priv = | |
379 | container_of(nb, struct drm_i915_private, mm.oom_notifier); | |
168cf367 | 380 | struct shrinker_lock_uninterruptible slu; |
be6a0376 | 381 | struct drm_i915_gem_object *obj; |
1768d455 | 382 | unsigned long unevictable, bound, unbound, freed_pages; |
be6a0376 | 383 | |
168cf367 | 384 | if (!i915_gem_shrinker_lock_uninterruptible(dev_priv, &slu, 5000)) |
be6a0376 | 385 | return NOTIFY_DONE; |
be6a0376 DV |
386 | |
387 | freed_pages = i915_gem_shrink_all(dev_priv); | |
388 | ||
be6a0376 DV |
389 | /* Because we may be allocating inside our own driver, we cannot |
390 | * assert that there are no objects with pinned pages that are not | |
391 | * being pointed to by hardware. | |
392 | */ | |
1768d455 | 393 | unbound = bound = unevictable = 0; |
56cea323 | 394 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_link) { |
fbbd37b3 CW |
395 | if (!obj->mm.pages) |
396 | continue; | |
397 | ||
1768d455 CW |
398 | if (!can_release_pages(obj)) |
399 | unevictable += obj->base.size >> PAGE_SHIFT; | |
be6a0376 | 400 | else |
1768d455 | 401 | unbound += obj->base.size >> PAGE_SHIFT; |
be6a0376 | 402 | } |
56cea323 | 403 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_link) { |
fbbd37b3 CW |
404 | if (!obj->mm.pages) |
405 | continue; | |
406 | ||
1768d455 CW |
407 | if (!can_release_pages(obj)) |
408 | unevictable += obj->base.size >> PAGE_SHIFT; | |
be6a0376 | 409 | else |
1768d455 | 410 | bound += obj->base.size >> PAGE_SHIFT; |
be6a0376 DV |
411 | } |
412 | ||
168cf367 | 413 | i915_gem_shrinker_unlock_uninterruptible(dev_priv, &slu); |
be6a0376 DV |
414 | |
415 | if (freed_pages || unbound || bound) | |
1768d455 CW |
416 | pr_info("Purging GPU memory, %lu pages freed, " |
417 | "%lu pages still pinned.\n", | |
418 | freed_pages, unevictable); | |
be6a0376 | 419 | if (unbound || bound) |
1768d455 | 420 | pr_err("%lu and %lu pages still available in the " |
be6a0376 DV |
421 | "bound and unbound GPU page lists.\n", |
422 | bound, unbound); | |
423 | ||
424 | *(unsigned long *)ptr += freed_pages; | |
425 | return NOTIFY_DONE; | |
426 | } | |
427 | ||
e87666b5 CW |
428 | static int |
429 | i915_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) | |
430 | { | |
431 | struct drm_i915_private *dev_priv = | |
432 | container_of(nb, struct drm_i915_private, mm.vmap_notifier); | |
168cf367 | 433 | struct shrinker_lock_uninterruptible slu; |
8ef8561f CW |
434 | struct i915_vma *vma, *next; |
435 | unsigned long freed_pages = 0; | |
436 | int ret; | |
e87666b5 | 437 | |
168cf367 | 438 | if (!i915_gem_shrinker_lock_uninterruptible(dev_priv, &slu, 5000)) |
e87666b5 | 439 | return NOTIFY_DONE; |
e87666b5 | 440 | |
8ef8561f | 441 | /* Force everything onto the inactive lists */ |
22dd3bb9 | 442 | ret = i915_gem_wait_for_idle(dev_priv, I915_WAIT_LOCKED); |
8ef8561f CW |
443 | if (ret) |
444 | goto out; | |
445 | ||
ea9d9768 | 446 | intel_runtime_pm_get(dev_priv); |
8ef8561f CW |
447 | freed_pages += i915_gem_shrink(dev_priv, -1UL, |
448 | I915_SHRINK_BOUND | | |
449 | I915_SHRINK_UNBOUND | | |
450 | I915_SHRINK_ACTIVE | | |
451 | I915_SHRINK_VMAPS); | |
ea9d9768 | 452 | intel_runtime_pm_put(dev_priv); |
8ef8561f CW |
453 | |
454 | /* We also want to clear any cached iomaps as they wrap vmap */ | |
455 | list_for_each_entry_safe(vma, next, | |
456 | &dev_priv->ggtt.base.inactive_list, vm_link) { | |
457 | unsigned long count = vma->node.size >> PAGE_SHIFT; | |
458 | if (vma->iomap && i915_vma_unbind(vma) == 0) | |
459 | freed_pages += count; | |
460 | } | |
e87666b5 | 461 | |
8ef8561f | 462 | out: |
168cf367 | 463 | i915_gem_shrinker_unlock_uninterruptible(dev_priv, &slu); |
e87666b5 CW |
464 | |
465 | *(unsigned long *)ptr += freed_pages; | |
466 | return NOTIFY_DONE; | |
467 | } | |
468 | ||
eb0b44ad DV |
469 | /** |
470 | * i915_gem_shrinker_init - Initialize i915 shrinker | |
471 | * @dev_priv: i915 device | |
472 | * | |
473 | * This function registers and sets up the i915 shrinker and OOM handler. | |
474 | */ | |
be6a0376 DV |
475 | void i915_gem_shrinker_init(struct drm_i915_private *dev_priv) |
476 | { | |
477 | dev_priv->mm.shrinker.scan_objects = i915_gem_shrinker_scan; | |
478 | dev_priv->mm.shrinker.count_objects = i915_gem_shrinker_count; | |
479 | dev_priv->mm.shrinker.seeks = DEFAULT_SEEKS; | |
a8a40589 | 480 | WARN_ON(register_shrinker(&dev_priv->mm.shrinker)); |
be6a0376 DV |
481 | |
482 | dev_priv->mm.oom_notifier.notifier_call = i915_gem_shrinker_oom; | |
a8a40589 | 483 | WARN_ON(register_oom_notifier(&dev_priv->mm.oom_notifier)); |
e87666b5 CW |
484 | |
485 | dev_priv->mm.vmap_notifier.notifier_call = i915_gem_shrinker_vmap; | |
486 | WARN_ON(register_vmap_purge_notifier(&dev_priv->mm.vmap_notifier)); | |
a8a40589 ID |
487 | } |
488 | ||
489 | /** | |
490 | * i915_gem_shrinker_cleanup - Clean up i915 shrinker | |
491 | * @dev_priv: i915 device | |
492 | * | |
493 | * This function unregisters the i915 shrinker and OOM handler. | |
494 | */ | |
495 | void i915_gem_shrinker_cleanup(struct drm_i915_private *dev_priv) | |
496 | { | |
e87666b5 | 497 | WARN_ON(unregister_vmap_purge_notifier(&dev_priv->mm.vmap_notifier)); |
a8a40589 ID |
498 | WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier)); |
499 | unregister_shrinker(&dev_priv->mm.shrinker); | |
be6a0376 | 500 | } |