Commit | Line | Data |
---|---|---|
952efe7b DH |
1 | /* FS-Cache worker operation management routines |
2 | * | |
3 | * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * See Documentation/filesystems/caching/operations.txt | |
12 | */ | |
13 | ||
14 | #define FSCACHE_DEBUG_LEVEL OPERATION | |
15 | #include <linux/module.h> | |
440f0aff | 16 | #include <linux/seq_file.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
952efe7b DH |
18 | #include "internal.h" |
19 | ||
20 | atomic_t fscache_op_debug_id; | |
21 | EXPORT_SYMBOL(fscache_op_debug_id); | |
22 | ||
23 | /** | |
24 | * fscache_enqueue_operation - Enqueue an operation for processing | |
25 | * @op: The operation to enqueue | |
26 | * | |
27 | * Enqueue an operation for processing by the FS-Cache thread pool. | |
28 | * | |
29 | * This will get its own ref on the object. | |
30 | */ | |
31 | void fscache_enqueue_operation(struct fscache_operation *op) | |
32 | { | |
33 | _enter("{OBJ%x OP%x,%u}", | |
34 | op->object->debug_id, op->debug_id, atomic_read(&op->usage)); | |
35 | ||
5753c441 | 36 | ASSERT(list_empty(&op->pend_link)); |
952efe7b | 37 | ASSERT(op->processor != NULL); |
493f7bc1 | 38 | ASSERT(fscache_object_is_available(op->object)); |
952efe7b | 39 | ASSERTCMP(atomic_read(&op->usage), >, 0); |
9f10523f | 40 | ASSERTCMP(op->state, ==, FSCACHE_OP_ST_IN_PROGRESS); |
952efe7b | 41 | |
5753c441 DH |
42 | fscache_stat(&fscache_n_op_enqueue); |
43 | switch (op->flags & FSCACHE_OP_TYPE) { | |
8af7c124 TH |
44 | case FSCACHE_OP_ASYNC: |
45 | _debug("queue async"); | |
5753c441 | 46 | atomic_inc(&op->usage); |
8af7c124 | 47 | if (!queue_work(fscache_op_wq, &op->work)) |
5753c441 DH |
48 | fscache_put_operation(op); |
49 | break; | |
5753c441 DH |
50 | case FSCACHE_OP_MYTHREAD: |
51 | _debug("queue for caller's attention"); | |
52 | break; | |
53 | default: | |
54 | printk(KERN_ERR "FS-Cache: Unexpected op type %lx", | |
55 | op->flags); | |
56 | BUG(); | |
57 | break; | |
952efe7b DH |
58 | } |
59 | } | |
60 | EXPORT_SYMBOL(fscache_enqueue_operation); | |
61 | ||
62 | /* | |
63 | * start an op running | |
64 | */ | |
65 | static void fscache_run_op(struct fscache_object *object, | |
66 | struct fscache_operation *op) | |
67 | { | |
9f10523f DH |
68 | ASSERTCMP(op->state, ==, FSCACHE_OP_ST_PENDING); |
69 | ||
70 | op->state = FSCACHE_OP_ST_IN_PROGRESS; | |
952efe7b DH |
71 | object->n_in_progress++; |
72 | if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags)) | |
73 | wake_up_bit(&op->flags, FSCACHE_OP_WAITING); | |
74 | if (op->processor) | |
75 | fscache_enqueue_operation(op); | |
76 | fscache_stat(&fscache_n_op_run); | |
77 | } | |
78 | ||
79 | /* | |
80 | * submit an exclusive operation for an object | |
81 | * - other ops are excluded from running simultaneously with this one | |
82 | * - this gets any extra refs it needs on an op | |
83 | */ | |
84 | int fscache_submit_exclusive_op(struct fscache_object *object, | |
85 | struct fscache_operation *op) | |
86 | { | |
8d76349d DH |
87 | int ret; |
88 | ||
952efe7b DH |
89 | _enter("{OBJ%x OP%x},", object->debug_id, op->debug_id); |
90 | ||
9f10523f DH |
91 | ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED); |
92 | ASSERTCMP(atomic_read(&op->usage), >, 0); | |
93 | ||
952efe7b DH |
94 | spin_lock(&object->lock); |
95 | ASSERTCMP(object->n_ops, >=, object->n_in_progress); | |
96 | ASSERTCMP(object->n_ops, >=, object->n_exclusive); | |
5753c441 | 97 | ASSERT(list_empty(&op->pend_link)); |
952efe7b | 98 | |
9f10523f | 99 | op->state = FSCACHE_OP_ST_PENDING; |
952efe7b DH |
100 | if (fscache_object_is_active(object)) { |
101 | op->object = object; | |
102 | object->n_ops++; | |
103 | object->n_exclusive++; /* reads and writes must wait */ | |
104 | ||
9f10523f | 105 | if (object->n_in_progress > 0) { |
952efe7b DH |
106 | atomic_inc(&op->usage); |
107 | list_add_tail(&op->pend_link, &object->pending_ops); | |
108 | fscache_stat(&fscache_n_op_pend); | |
109 | } else if (!list_empty(&object->pending_ops)) { | |
110 | atomic_inc(&op->usage); | |
111 | list_add_tail(&op->pend_link, &object->pending_ops); | |
112 | fscache_stat(&fscache_n_op_pend); | |
113 | fscache_start_operations(object); | |
114 | } else { | |
115 | ASSERTCMP(object->n_in_progress, ==, 0); | |
116 | fscache_run_op(object, op); | |
117 | } | |
118 | ||
119 | /* need to issue a new write op after this */ | |
120 | clear_bit(FSCACHE_OBJECT_PENDING_WRITE, &object->flags); | |
8d76349d | 121 | ret = 0; |
caaef690 | 122 | } else if (test_bit(FSCACHE_OBJECT_IS_LOOKED_UP, &object->flags)) { |
952efe7b DH |
123 | op->object = object; |
124 | object->n_ops++; | |
125 | object->n_exclusive++; /* reads and writes must wait */ | |
126 | atomic_inc(&op->usage); | |
127 | list_add_tail(&op->pend_link, &object->pending_ops); | |
128 | fscache_stat(&fscache_n_op_pend); | |
8d76349d | 129 | ret = 0; |
952efe7b | 130 | } else { |
8d76349d DH |
131 | /* If we're in any other state, there must have been an I/O |
132 | * error of some nature. | |
133 | */ | |
134 | ASSERT(test_bit(FSCACHE_IOERROR, &object->cache->flags)); | |
135 | ret = -EIO; | |
952efe7b DH |
136 | } |
137 | ||
138 | spin_unlock(&object->lock); | |
8d76349d | 139 | return ret; |
952efe7b DH |
140 | } |
141 | ||
142 | /* | |
143 | * report an unexpected submission | |
144 | */ | |
145 | static void fscache_report_unexpected_submission(struct fscache_object *object, | |
146 | struct fscache_operation *op, | |
caaef690 | 147 | const struct fscache_state *ostate) |
952efe7b DH |
148 | { |
149 | static bool once_only; | |
150 | struct fscache_operation *p; | |
151 | unsigned n; | |
152 | ||
153 | if (once_only) | |
154 | return; | |
155 | once_only = true; | |
156 | ||
157 | kdebug("unexpected submission OP%x [OBJ%x %s]", | |
caaef690 DH |
158 | op->debug_id, object->debug_id, object->state->name); |
159 | kdebug("objstate=%s [%s]", object->state->name, ostate->name); | |
952efe7b DH |
160 | kdebug("objflags=%lx", object->flags); |
161 | kdebug("objevent=%lx [%lx]", object->events, object->event_mask); | |
162 | kdebug("ops=%u inp=%u exc=%u", | |
163 | object->n_ops, object->n_in_progress, object->n_exclusive); | |
164 | ||
165 | if (!list_empty(&object->pending_ops)) { | |
166 | n = 0; | |
167 | list_for_each_entry(p, &object->pending_ops, pend_link) { | |
168 | ASSERTCMP(p->object, ==, object); | |
169 | kdebug("%p %p", op->processor, op->release); | |
170 | n++; | |
171 | } | |
172 | ||
173 | kdebug("n=%u", n); | |
174 | } | |
175 | ||
176 | dump_stack(); | |
177 | } | |
178 | ||
179 | /* | |
180 | * submit an operation for an object | |
181 | * - objects may be submitted only in the following states: | |
182 | * - during object creation (write ops may be submitted) | |
183 | * - whilst the object is active | |
184 | * - after an I/O error incurred in one of the two above states (op rejected) | |
185 | * - this gets any extra refs it needs on an op | |
186 | */ | |
187 | int fscache_submit_op(struct fscache_object *object, | |
188 | struct fscache_operation *op) | |
189 | { | |
caaef690 | 190 | const struct fscache_state *ostate; |
952efe7b DH |
191 | int ret; |
192 | ||
193 | _enter("{OBJ%x OP%x},{%u}", | |
194 | object->debug_id, op->debug_id, atomic_read(&op->usage)); | |
195 | ||
9f10523f | 196 | ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED); |
952efe7b DH |
197 | ASSERTCMP(atomic_read(&op->usage), >, 0); |
198 | ||
199 | spin_lock(&object->lock); | |
200 | ASSERTCMP(object->n_ops, >=, object->n_in_progress); | |
201 | ASSERTCMP(object->n_ops, >=, object->n_exclusive); | |
5753c441 | 202 | ASSERT(list_empty(&op->pend_link)); |
952efe7b DH |
203 | |
204 | ostate = object->state; | |
205 | smp_rmb(); | |
206 | ||
9f10523f | 207 | op->state = FSCACHE_OP_ST_PENDING; |
952efe7b DH |
208 | if (fscache_object_is_active(object)) { |
209 | op->object = object; | |
210 | object->n_ops++; | |
211 | ||
212 | if (object->n_exclusive > 0) { | |
213 | atomic_inc(&op->usage); | |
214 | list_add_tail(&op->pend_link, &object->pending_ops); | |
215 | fscache_stat(&fscache_n_op_pend); | |
216 | } else if (!list_empty(&object->pending_ops)) { | |
217 | atomic_inc(&op->usage); | |
218 | list_add_tail(&op->pend_link, &object->pending_ops); | |
219 | fscache_stat(&fscache_n_op_pend); | |
220 | fscache_start_operations(object); | |
221 | } else { | |
222 | ASSERTCMP(object->n_exclusive, ==, 0); | |
223 | fscache_run_op(object, op); | |
224 | } | |
225 | ret = 0; | |
caaef690 | 226 | } else if (test_bit(FSCACHE_OBJECT_IS_LOOKED_UP, &object->flags)) { |
952efe7b DH |
227 | op->object = object; |
228 | object->n_ops++; | |
229 | atomic_inc(&op->usage); | |
230 | list_add_tail(&op->pend_link, &object->pending_ops); | |
231 | fscache_stat(&fscache_n_op_pend); | |
232 | ret = 0; | |
caaef690 | 233 | } else if (fscache_object_is_dying(object)) { |
e3d4d28b | 234 | fscache_stat(&fscache_n_op_rejected); |
9f10523f | 235 | op->state = FSCACHE_OP_ST_CANCELLED; |
e3d4d28b | 236 | ret = -ENOBUFS; |
952efe7b DH |
237 | } else if (!test_bit(FSCACHE_IOERROR, &object->cache->flags)) { |
238 | fscache_report_unexpected_submission(object, op, ostate); | |
239 | ASSERT(!fscache_object_is_active(object)); | |
9f10523f | 240 | op->state = FSCACHE_OP_ST_CANCELLED; |
952efe7b DH |
241 | ret = -ENOBUFS; |
242 | } else { | |
9f10523f | 243 | op->state = FSCACHE_OP_ST_CANCELLED; |
952efe7b DH |
244 | ret = -ENOBUFS; |
245 | } | |
246 | ||
247 | spin_unlock(&object->lock); | |
248 | return ret; | |
249 | } | |
250 | ||
251 | /* | |
252 | * queue an object for withdrawal on error, aborting all following asynchronous | |
253 | * operations | |
254 | */ | |
255 | void fscache_abort_object(struct fscache_object *object) | |
256 | { | |
257 | _enter("{OBJ%x}", object->debug_id); | |
258 | ||
259 | fscache_raise_event(object, FSCACHE_OBJECT_EV_ERROR); | |
260 | } | |
261 | ||
262 | /* | |
dcfae32f DH |
263 | * Jump start the operation processing on an object. The caller must hold |
264 | * object->lock. | |
952efe7b DH |
265 | */ |
266 | void fscache_start_operations(struct fscache_object *object) | |
267 | { | |
268 | struct fscache_operation *op; | |
269 | bool stop = false; | |
270 | ||
271 | while (!list_empty(&object->pending_ops) && !stop) { | |
272 | op = list_entry(object->pending_ops.next, | |
273 | struct fscache_operation, pend_link); | |
274 | ||
275 | if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) { | |
276 | if (object->n_in_progress > 0) | |
277 | break; | |
278 | stop = true; | |
279 | } | |
280 | list_del_init(&op->pend_link); | |
5753c441 | 281 | fscache_run_op(object, op); |
952efe7b DH |
282 | |
283 | /* the pending queue was holding a ref on the object */ | |
284 | fscache_put_operation(op); | |
285 | } | |
286 | ||
287 | ASSERTCMP(object->n_in_progress, <=, object->n_ops); | |
288 | ||
289 | _debug("woke %d ops on OBJ%x", | |
290 | object->n_in_progress, object->debug_id); | |
291 | } | |
292 | ||
5753c441 DH |
293 | /* |
294 | * cancel an operation that's pending on an object | |
295 | */ | |
91c7fbbf DH |
296 | int fscache_cancel_op(struct fscache_operation *op, |
297 | void (*do_cancel)(struct fscache_operation *)) | |
5753c441 DH |
298 | { |
299 | struct fscache_object *object = op->object; | |
300 | int ret; | |
301 | ||
302 | _enter("OBJ%x OP%x}", op->object->debug_id, op->debug_id); | |
303 | ||
9f10523f DH |
304 | ASSERTCMP(op->state, >=, FSCACHE_OP_ST_PENDING); |
305 | ASSERTCMP(op->state, !=, FSCACHE_OP_ST_CANCELLED); | |
306 | ASSERTCMP(atomic_read(&op->usage), >, 0); | |
307 | ||
5753c441 DH |
308 | spin_lock(&object->lock); |
309 | ||
310 | ret = -EBUSY; | |
9f10523f DH |
311 | if (op->state == FSCACHE_OP_ST_PENDING) { |
312 | ASSERT(!list_empty(&op->pend_link)); | |
5753c441 DH |
313 | fscache_stat(&fscache_n_op_cancelled); |
314 | list_del_init(&op->pend_link); | |
91c7fbbf DH |
315 | if (do_cancel) |
316 | do_cancel(op); | |
9f10523f | 317 | op->state = FSCACHE_OP_ST_CANCELLED; |
5753c441 DH |
318 | if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) |
319 | object->n_exclusive--; | |
320 | if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags)) | |
321 | wake_up_bit(&op->flags, FSCACHE_OP_WAITING); | |
322 | fscache_put_operation(op); | |
323 | ret = 0; | |
324 | } | |
325 | ||
326 | spin_unlock(&object->lock); | |
327 | _leave(" = %d", ret); | |
328 | return ret; | |
329 | } | |
330 | ||
ef778e7a DH |
331 | /* |
332 | * Cancel all pending operations on an object | |
333 | */ | |
334 | void fscache_cancel_all_ops(struct fscache_object *object) | |
335 | { | |
336 | struct fscache_operation *op; | |
337 | ||
338 | _enter("OBJ%x", object->debug_id); | |
339 | ||
340 | spin_lock(&object->lock); | |
341 | ||
342 | while (!list_empty(&object->pending_ops)) { | |
343 | op = list_entry(object->pending_ops.next, | |
344 | struct fscache_operation, pend_link); | |
345 | fscache_stat(&fscache_n_op_cancelled); | |
346 | list_del_init(&op->pend_link); | |
347 | ||
348 | ASSERTCMP(op->state, ==, FSCACHE_OP_ST_PENDING); | |
349 | op->state = FSCACHE_OP_ST_CANCELLED; | |
350 | ||
351 | if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) | |
352 | object->n_exclusive--; | |
353 | if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags)) | |
354 | wake_up_bit(&op->flags, FSCACHE_OP_WAITING); | |
355 | fscache_put_operation(op); | |
356 | cond_resched_lock(&object->lock); | |
357 | } | |
358 | ||
359 | spin_unlock(&object->lock); | |
360 | _leave(""); | |
361 | } | |
362 | ||
9f10523f | 363 | /* |
1f372dff | 364 | * Record the completion or cancellation of an in-progress operation. |
9f10523f | 365 | */ |
1f372dff | 366 | void fscache_op_complete(struct fscache_operation *op, bool cancelled) |
9f10523f DH |
367 | { |
368 | struct fscache_object *object = op->object; | |
369 | ||
370 | _enter("OBJ%x", object->debug_id); | |
371 | ||
372 | ASSERTCMP(op->state, ==, FSCACHE_OP_ST_IN_PROGRESS); | |
373 | ASSERTCMP(object->n_in_progress, >, 0); | |
374 | ASSERTIFCMP(test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags), | |
375 | object->n_exclusive, >, 0); | |
376 | ASSERTIFCMP(test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags), | |
377 | object->n_in_progress, ==, 1); | |
378 | ||
379 | spin_lock(&object->lock); | |
380 | ||
1f372dff DH |
381 | op->state = cancelled ? |
382 | FSCACHE_OP_ST_CANCELLED : FSCACHE_OP_ST_COMPLETE; | |
9f10523f DH |
383 | |
384 | if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) | |
385 | object->n_exclusive--; | |
386 | object->n_in_progress--; | |
387 | if (object->n_in_progress == 0) | |
388 | fscache_start_operations(object); | |
389 | ||
390 | spin_unlock(&object->lock); | |
391 | _leave(""); | |
392 | } | |
393 | EXPORT_SYMBOL(fscache_op_complete); | |
394 | ||
952efe7b DH |
395 | /* |
396 | * release an operation | |
397 | * - queues pending ops if this is the last in-progress op | |
398 | */ | |
399 | void fscache_put_operation(struct fscache_operation *op) | |
400 | { | |
401 | struct fscache_object *object; | |
402 | struct fscache_cache *cache; | |
403 | ||
404 | _enter("{OBJ%x OP%x,%d}", | |
405 | op->object->debug_id, op->debug_id, atomic_read(&op->usage)); | |
406 | ||
407 | ASSERTCMP(atomic_read(&op->usage), >, 0); | |
408 | ||
409 | if (!atomic_dec_and_test(&op->usage)) | |
410 | return; | |
411 | ||
412 | _debug("PUT OP"); | |
9f10523f DH |
413 | ASSERTIFCMP(op->state != FSCACHE_OP_ST_COMPLETE, |
414 | op->state, ==, FSCACHE_OP_ST_CANCELLED); | |
415 | op->state = FSCACHE_OP_ST_DEAD; | |
952efe7b DH |
416 | |
417 | fscache_stat(&fscache_n_op_release); | |
418 | ||
419 | if (op->release) { | |
420 | op->release(op); | |
421 | op->release = NULL; | |
422 | } | |
423 | ||
424 | object = op->object; | |
425 | ||
1362729b DH |
426 | if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags)) |
427 | atomic_dec(&object->n_reads); | |
428 | if (test_bit(FSCACHE_OP_UNUSE_COOKIE, &op->flags)) | |
429 | fscache_unuse_cookie(object); | |
4fbf4291 | 430 | |
952efe7b DH |
431 | /* now... we may get called with the object spinlock held, so we |
432 | * complete the cleanup here only if we can immediately acquire the | |
433 | * lock, and defer it otherwise */ | |
434 | if (!spin_trylock(&object->lock)) { | |
435 | _debug("defer put"); | |
436 | fscache_stat(&fscache_n_op_deferred_release); | |
437 | ||
438 | cache = object->cache; | |
439 | spin_lock(&cache->op_gc_list_lock); | |
440 | list_add_tail(&op->pend_link, &cache->op_gc_list); | |
441 | spin_unlock(&cache->op_gc_list_lock); | |
442 | schedule_work(&cache->op_gc); | |
443 | _leave(" [defer]"); | |
444 | return; | |
445 | } | |
446 | ||
952efe7b DH |
447 | ASSERTCMP(object->n_ops, >, 0); |
448 | object->n_ops--; | |
449 | if (object->n_ops == 0) | |
450 | fscache_raise_event(object, FSCACHE_OBJECT_EV_CLEARED); | |
451 | ||
452 | spin_unlock(&object->lock); | |
453 | ||
454 | kfree(op); | |
455 | _leave(" [done]"); | |
456 | } | |
457 | EXPORT_SYMBOL(fscache_put_operation); | |
458 | ||
459 | /* | |
460 | * garbage collect operations that have had their release deferred | |
461 | */ | |
462 | void fscache_operation_gc(struct work_struct *work) | |
463 | { | |
464 | struct fscache_operation *op; | |
465 | struct fscache_object *object; | |
466 | struct fscache_cache *cache = | |
467 | container_of(work, struct fscache_cache, op_gc); | |
468 | int count = 0; | |
469 | ||
470 | _enter(""); | |
471 | ||
472 | do { | |
473 | spin_lock(&cache->op_gc_list_lock); | |
474 | if (list_empty(&cache->op_gc_list)) { | |
475 | spin_unlock(&cache->op_gc_list_lock); | |
476 | break; | |
477 | } | |
478 | ||
479 | op = list_entry(cache->op_gc_list.next, | |
480 | struct fscache_operation, pend_link); | |
481 | list_del(&op->pend_link); | |
482 | spin_unlock(&cache->op_gc_list_lock); | |
483 | ||
484 | object = op->object; | |
9f10523f | 485 | spin_lock(&object->lock); |
952efe7b DH |
486 | |
487 | _debug("GC DEFERRED REL OBJ%x OP%x", | |
488 | object->debug_id, op->debug_id); | |
489 | fscache_stat(&fscache_n_op_gc); | |
490 | ||
491 | ASSERTCMP(atomic_read(&op->usage), ==, 0); | |
9f10523f | 492 | ASSERTCMP(op->state, ==, FSCACHE_OP_ST_DEAD); |
952efe7b DH |
493 | |
494 | ASSERTCMP(object->n_ops, >, 0); | |
495 | object->n_ops--; | |
496 | if (object->n_ops == 0) | |
497 | fscache_raise_event(object, FSCACHE_OBJECT_EV_CLEARED); | |
498 | ||
499 | spin_unlock(&object->lock); | |
9f10523f | 500 | kfree(op); |
952efe7b DH |
501 | |
502 | } while (count++ < 20); | |
503 | ||
504 | if (!list_empty(&cache->op_gc_list)) | |
505 | schedule_work(&cache->op_gc); | |
506 | ||
507 | _leave(""); | |
508 | } | |
509 | ||
510 | /* | |
8af7c124 TH |
511 | * execute an operation using fs_op_wq to provide processing context - |
512 | * the caller holds a ref to this object, so we don't need to hold one | |
952efe7b | 513 | */ |
8af7c124 | 514 | void fscache_op_work_func(struct work_struct *work) |
952efe7b DH |
515 | { |
516 | struct fscache_operation *op = | |
8af7c124 | 517 | container_of(work, struct fscache_operation, work); |
952efe7b DH |
518 | unsigned long start; |
519 | ||
520 | _enter("{OBJ%x OP%x,%d}", | |
521 | op->object->debug_id, op->debug_id, atomic_read(&op->usage)); | |
522 | ||
523 | ASSERT(op->processor != NULL); | |
524 | start = jiffies; | |
525 | op->processor(op); | |
526 | fscache_hist(fscache_ops_histogram, start); | |
8af7c124 | 527 | fscache_put_operation(op); |
952efe7b DH |
528 | |
529 | _leave(""); | |
530 | } |