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d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License version 2 for more details (a copy is included | |
14 | * in the LICENSE file that accompanied this code). | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * version 2 along with this program; If not, see | |
18 | * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf | |
19 | * | |
20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
21 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
22 | * have any questions. | |
23 | * | |
24 | * GPL HEADER END | |
25 | */ | |
26 | /* | |
27 | * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
29 | * | |
1dc563a6 | 30 | * Copyright (c) 2011, 2015, Intel Corporation. |
d7e09d03 PT |
31 | */ |
32 | /* | |
33 | * This file is part of Lustre, http://www.lustre.org/ | |
34 | * Lustre is a trademark of Sun Microsystems, Inc. | |
35 | * | |
36 | * Implementation of cl_page for VVP layer. | |
37 | * | |
38 | * Author: Nikita Danilov <nikita.danilov@sun.com> | |
39 | * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com> | |
40 | */ | |
41 | ||
42 | #define DEBUG_SUBSYSTEM S_LLITE | |
43 | ||
67a235f5 GKH |
44 | #include "../include/obd.h" |
45 | #include "../include/lustre_lite.h" | |
d7e09d03 PT |
46 | |
47 | #include "vvp_internal.h" | |
48 | ||
49 | /***************************************************************************** | |
50 | * | |
51 | * Page operations. | |
52 | * | |
53 | */ | |
54 | ||
55 | static void vvp_page_fini_common(struct ccc_page *cp) | |
56 | { | |
57 | struct page *vmpage = cp->cpg_page; | |
58 | ||
59 | LASSERT(vmpage != NULL); | |
60 | page_cache_release(vmpage); | |
61 | } | |
62 | ||
63 | static void vvp_page_fini(const struct lu_env *env, | |
64 | struct cl_page_slice *slice) | |
65 | { | |
66 | struct ccc_page *cp = cl2ccc_page(slice); | |
67 | struct page *vmpage = cp->cpg_page; | |
68 | ||
69 | /* | |
70 | * vmpage->private was already cleared when page was moved into | |
71 | * VPG_FREEING state. | |
72 | */ | |
73 | LASSERT((struct cl_page *)vmpage->private != slice->cpl_page); | |
74 | vvp_page_fini_common(cp); | |
75 | } | |
76 | ||
77 | static int vvp_page_own(const struct lu_env *env, | |
78 | const struct cl_page_slice *slice, struct cl_io *io, | |
79 | int nonblock) | |
80 | { | |
81 | struct ccc_page *vpg = cl2ccc_page(slice); | |
82 | struct page *vmpage = vpg->cpg_page; | |
83 | ||
84 | LASSERT(vmpage != NULL); | |
85 | if (nonblock) { | |
86 | if (!trylock_page(vmpage)) | |
87 | return -EAGAIN; | |
88 | ||
89 | if (unlikely(PageWriteback(vmpage))) { | |
90 | unlock_page(vmpage); | |
91 | return -EAGAIN; | |
92 | } | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
97 | lock_page(vmpage); | |
98 | wait_on_page_writeback(vmpage); | |
99 | return 0; | |
100 | } | |
101 | ||
102 | static void vvp_page_assume(const struct lu_env *env, | |
103 | const struct cl_page_slice *slice, | |
104 | struct cl_io *unused) | |
105 | { | |
106 | struct page *vmpage = cl2vm_page(slice); | |
107 | ||
108 | LASSERT(vmpage != NULL); | |
109 | LASSERT(PageLocked(vmpage)); | |
110 | wait_on_page_writeback(vmpage); | |
111 | } | |
112 | ||
113 | static void vvp_page_unassume(const struct lu_env *env, | |
114 | const struct cl_page_slice *slice, | |
115 | struct cl_io *unused) | |
116 | { | |
117 | struct page *vmpage = cl2vm_page(slice); | |
118 | ||
119 | LASSERT(vmpage != NULL); | |
120 | LASSERT(PageLocked(vmpage)); | |
121 | } | |
122 | ||
123 | static void vvp_page_disown(const struct lu_env *env, | |
124 | const struct cl_page_slice *slice, struct cl_io *io) | |
125 | { | |
126 | struct page *vmpage = cl2vm_page(slice); | |
127 | ||
128 | LASSERT(vmpage != NULL); | |
129 | LASSERT(PageLocked(vmpage)); | |
130 | ||
131 | unlock_page(cl2vm_page(slice)); | |
132 | } | |
133 | ||
134 | static void vvp_page_discard(const struct lu_env *env, | |
135 | const struct cl_page_slice *slice, | |
136 | struct cl_io *unused) | |
137 | { | |
138 | struct page *vmpage = cl2vm_page(slice); | |
139 | struct address_space *mapping; | |
140 | struct ccc_page *cpg = cl2ccc_page(slice); | |
141 | ||
142 | LASSERT(vmpage != NULL); | |
143 | LASSERT(PageLocked(vmpage)); | |
144 | ||
145 | mapping = vmpage->mapping; | |
146 | ||
147 | if (cpg->cpg_defer_uptodate && !cpg->cpg_ra_used) | |
148 | ll_ra_stats_inc(mapping, RA_STAT_DISCARDED); | |
149 | ||
150 | /* | |
151 | * truncate_complete_page() calls | |
152 | * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete(). | |
153 | */ | |
154 | truncate_complete_page(mapping, vmpage); | |
155 | } | |
156 | ||
157 | static int vvp_page_unmap(const struct lu_env *env, | |
158 | const struct cl_page_slice *slice, | |
159 | struct cl_io *unused) | |
160 | { | |
161 | struct page *vmpage = cl2vm_page(slice); | |
162 | __u64 offset; | |
163 | ||
164 | LASSERT(vmpage != NULL); | |
165 | LASSERT(PageLocked(vmpage)); | |
166 | ||
167 | offset = vmpage->index << PAGE_CACHE_SHIFT; | |
168 | ||
169 | /* | |
170 | * XXX is it safe to call this with the page lock held? | |
171 | */ | |
172 | ll_teardown_mmaps(vmpage->mapping, offset, offset + PAGE_CACHE_SIZE); | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static void vvp_page_delete(const struct lu_env *env, | |
177 | const struct cl_page_slice *slice) | |
178 | { | |
179 | struct page *vmpage = cl2vm_page(slice); | |
180 | struct inode *inode = vmpage->mapping->host; | |
181 | struct cl_object *obj = slice->cpl_obj; | |
182 | ||
183 | LASSERT(PageLocked(vmpage)); | |
184 | LASSERT((struct cl_page *)vmpage->private == slice->cpl_page); | |
185 | LASSERT(inode == ccc_object_inode(obj)); | |
186 | ||
187 | vvp_write_complete(cl2ccc(obj), cl2ccc_page(slice)); | |
188 | ClearPagePrivate(vmpage); | |
189 | vmpage->private = 0; | |
190 | /* | |
191 | * Reference from vmpage to cl_page is removed, but the reference back | |
192 | * is still here. It is removed later in vvp_page_fini(). | |
193 | */ | |
194 | } | |
195 | ||
196 | static void vvp_page_export(const struct lu_env *env, | |
197 | const struct cl_page_slice *slice, | |
198 | int uptodate) | |
199 | { | |
200 | struct page *vmpage = cl2vm_page(slice); | |
201 | ||
202 | LASSERT(vmpage != NULL); | |
203 | LASSERT(PageLocked(vmpage)); | |
204 | if (uptodate) | |
205 | SetPageUptodate(vmpage); | |
206 | else | |
207 | ClearPageUptodate(vmpage); | |
208 | } | |
209 | ||
210 | static int vvp_page_is_vmlocked(const struct lu_env *env, | |
211 | const struct cl_page_slice *slice) | |
212 | { | |
213 | return PageLocked(cl2vm_page(slice)) ? -EBUSY : -ENODATA; | |
214 | } | |
215 | ||
216 | static int vvp_page_prep_read(const struct lu_env *env, | |
217 | const struct cl_page_slice *slice, | |
218 | struct cl_io *unused) | |
219 | { | |
d7e09d03 | 220 | /* Skip the page already marked as PG_uptodate. */ |
0a3bdb00 | 221 | return PageUptodate(cl2vm_page(slice)) ? -EALREADY : 0; |
d7e09d03 PT |
222 | } |
223 | ||
224 | static int vvp_page_prep_write(const struct lu_env *env, | |
225 | const struct cl_page_slice *slice, | |
226 | struct cl_io *unused) | |
227 | { | |
228 | struct page *vmpage = cl2vm_page(slice); | |
176d1b96 | 229 | struct cl_page *pg = slice->cpl_page; |
d7e09d03 PT |
230 | |
231 | LASSERT(PageLocked(vmpage)); | |
232 | LASSERT(!PageDirty(vmpage)); | |
233 | ||
176d1b96 OD |
234 | /* ll_writepage path is not a sync write, so need to set page writeback |
235 | * flag */ | |
236 | if (!pg->cp_sync_io) | |
237 | set_page_writeback(vmpage); | |
238 | ||
d7e09d03 PT |
239 | vvp_write_pending(cl2ccc(slice->cpl_obj), cl2ccc_page(slice)); |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | /** | |
245 | * Handles page transfer errors at VM level. | |
246 | * | |
247 | * This takes inode as a separate argument, because inode on which error is to | |
248 | * be set can be different from \a vmpage inode in case of direct-io. | |
249 | */ | |
250 | static void vvp_vmpage_error(struct inode *inode, struct page *vmpage, int ioret) | |
251 | { | |
252 | struct ccc_object *obj = cl_inode2ccc(inode); | |
253 | ||
254 | if (ioret == 0) { | |
255 | ClearPageError(vmpage); | |
256 | obj->cob_discard_page_warned = 0; | |
257 | } else { | |
258 | SetPageError(vmpage); | |
259 | if (ioret == -ENOSPC) | |
260 | set_bit(AS_ENOSPC, &inode->i_mapping->flags); | |
261 | else | |
262 | set_bit(AS_EIO, &inode->i_mapping->flags); | |
263 | ||
264 | if ((ioret == -ESHUTDOWN || ioret == -EINTR) && | |
265 | obj->cob_discard_page_warned == 0) { | |
266 | obj->cob_discard_page_warned = 1; | |
267 | ll_dirty_page_discard_warn(vmpage, ioret); | |
268 | } | |
269 | } | |
270 | } | |
271 | ||
272 | static void vvp_page_completion_read(const struct lu_env *env, | |
273 | const struct cl_page_slice *slice, | |
274 | int ioret) | |
275 | { | |
276 | struct ccc_page *cp = cl2ccc_page(slice); | |
277 | struct page *vmpage = cp->cpg_page; | |
278 | struct cl_page *page = cl_page_top(slice->cpl_page); | |
279 | struct inode *inode = ccc_object_inode(page->cp_obj); | |
d7e09d03 PT |
280 | |
281 | LASSERT(PageLocked(vmpage)); | |
282 | CL_PAGE_HEADER(D_PAGE, env, page, "completing READ with %d\n", ioret); | |
283 | ||
284 | if (cp->cpg_defer_uptodate) | |
285 | ll_ra_count_put(ll_i2sbi(inode), 1); | |
286 | ||
287 | if (ioret == 0) { | |
288 | if (!cp->cpg_defer_uptodate) | |
289 | cl_page_export(env, page, 1); | |
290 | } else | |
291 | cp->cpg_defer_uptodate = 0; | |
292 | ||
293 | if (page->cp_sync_io == NULL) | |
294 | unlock_page(vmpage); | |
d7e09d03 PT |
295 | } |
296 | ||
297 | static void vvp_page_completion_write(const struct lu_env *env, | |
298 | const struct cl_page_slice *slice, | |
299 | int ioret) | |
300 | { | |
301 | struct ccc_page *cp = cl2ccc_page(slice); | |
302 | struct cl_page *pg = slice->cpl_page; | |
303 | struct page *vmpage = cp->cpg_page; | |
d7e09d03 | 304 | |
d7e09d03 PT |
305 | CL_PAGE_HEADER(D_PAGE, env, pg, "completing WRITE with %d\n", ioret); |
306 | ||
307 | /* | |
308 | * TODO: Actually it makes sense to add the page into oap pending | |
309 | * list again and so that we don't need to take the page out from | |
310 | * SoM write pending list, if we just meet a recoverable error, | |
311 | * -ENOMEM, etc. | |
312 | * To implement this, we just need to return a non zero value in | |
313 | * ->cpo_completion method. The underlying transfer should be notified | |
314 | * and then re-add the page into pending transfer queue. -jay | |
315 | */ | |
316 | ||
317 | cp->cpg_write_queued = 0; | |
318 | vvp_write_complete(cl2ccc(slice->cpl_obj), cp); | |
319 | ||
176d1b96 OD |
320 | if (pg->cp_sync_io != NULL) { |
321 | LASSERT(PageLocked(vmpage)); | |
322 | LASSERT(!PageWriteback(vmpage)); | |
323 | } else { | |
324 | LASSERT(PageWriteback(vmpage)); | |
325 | /* | |
326 | * Only mark the page error only when it's an async write | |
327 | * because applications won't wait for IO to finish. | |
328 | */ | |
d7e09d03 PT |
329 | vvp_vmpage_error(ccc_object_inode(pg->cp_obj), vmpage, ioret); |
330 | ||
176d1b96 OD |
331 | end_page_writeback(vmpage); |
332 | } | |
d7e09d03 PT |
333 | } |
334 | ||
335 | /** | |
336 | * Implements cl_page_operations::cpo_make_ready() method. | |
337 | * | |
338 | * This is called to yank a page from the transfer cache and to send it out as | |
339 | * a part of transfer. This function try-locks the page. If try-lock failed, | |
340 | * page is owned by some concurrent IO, and should be skipped (this is bad, | |
341 | * but hopefully rare situation, as it usually results in transfer being | |
342 | * shorter than possible). | |
343 | * | |
344 | * \retval 0 success, page can be placed into transfer | |
345 | * | |
346 | * \retval -EAGAIN page is either used by concurrent IO has been | |
347 | * truncated. Skip it. | |
348 | */ | |
349 | static int vvp_page_make_ready(const struct lu_env *env, | |
350 | const struct cl_page_slice *slice) | |
351 | { | |
352 | struct page *vmpage = cl2vm_page(slice); | |
353 | struct cl_page *pg = slice->cpl_page; | |
354 | int result = 0; | |
355 | ||
356 | lock_page(vmpage); | |
357 | if (clear_page_dirty_for_io(vmpage)) { | |
358 | LASSERT(pg->cp_state == CPS_CACHED); | |
359 | /* This actually clears the dirty bit in the radix | |
360 | * tree. */ | |
361 | set_page_writeback(vmpage); | |
362 | vvp_write_pending(cl2ccc(slice->cpl_obj), | |
363 | cl2ccc_page(slice)); | |
364 | CL_PAGE_HEADER(D_PAGE, env, pg, "readied\n"); | |
365 | } else if (pg->cp_state == CPS_PAGEOUT) { | |
366 | /* is it possible for osc_flush_async_page() to already | |
367 | * make it ready? */ | |
368 | result = -EALREADY; | |
369 | } else { | |
370 | CL_PAGE_DEBUG(D_ERROR, env, pg, "Unexpecting page state %d.\n", | |
371 | pg->cp_state); | |
372 | LBUG(); | |
373 | } | |
374 | unlock_page(vmpage); | |
0a3bdb00 | 375 | return result; |
d7e09d03 PT |
376 | } |
377 | ||
378 | static int vvp_page_print(const struct lu_env *env, | |
379 | const struct cl_page_slice *slice, | |
380 | void *cookie, lu_printer_t printer) | |
381 | { | |
382 | struct ccc_page *vp = cl2ccc_page(slice); | |
383 | struct page *vmpage = vp->cpg_page; | |
384 | ||
2d00bd17 | 385 | (*printer)(env, cookie, LUSTRE_VVP_NAME "-page@%p(%d:%d:%d) vm@%p ", |
d7e09d03 PT |
386 | vp, vp->cpg_defer_uptodate, vp->cpg_ra_used, |
387 | vp->cpg_write_queued, vmpage); | |
388 | if (vmpage != NULL) { | |
389 | (*printer)(env, cookie, "%lx %d:%d %lx %lu %slru", | |
390 | (long)vmpage->flags, page_count(vmpage), | |
391 | page_mapcount(vmpage), vmpage->private, | |
392 | page_index(vmpage), | |
393 | list_empty(&vmpage->lru) ? "not-" : ""); | |
394 | } | |
395 | (*printer)(env, cookie, "\n"); | |
396 | return 0; | |
397 | } | |
398 | ||
399 | static const struct cl_page_operations vvp_page_ops = { | |
400 | .cpo_own = vvp_page_own, | |
401 | .cpo_assume = vvp_page_assume, | |
402 | .cpo_unassume = vvp_page_unassume, | |
403 | .cpo_disown = vvp_page_disown, | |
404 | .cpo_vmpage = ccc_page_vmpage, | |
405 | .cpo_discard = vvp_page_discard, | |
406 | .cpo_delete = vvp_page_delete, | |
407 | .cpo_unmap = vvp_page_unmap, | |
408 | .cpo_export = vvp_page_export, | |
409 | .cpo_is_vmlocked = vvp_page_is_vmlocked, | |
410 | .cpo_fini = vvp_page_fini, | |
411 | .cpo_print = vvp_page_print, | |
412 | .cpo_is_under_lock = ccc_page_is_under_lock, | |
413 | .io = { | |
414 | [CRT_READ] = { | |
415 | .cpo_prep = vvp_page_prep_read, | |
416 | .cpo_completion = vvp_page_completion_read, | |
417 | .cpo_make_ready = ccc_fail, | |
418 | }, | |
419 | [CRT_WRITE] = { | |
420 | .cpo_prep = vvp_page_prep_write, | |
421 | .cpo_completion = vvp_page_completion_write, | |
422 | .cpo_make_ready = vvp_page_make_ready, | |
423 | } | |
424 | } | |
425 | }; | |
426 | ||
427 | static void vvp_transient_page_verify(const struct cl_page *page) | |
428 | { | |
429 | struct inode *inode = ccc_object_inode(page->cp_obj); | |
430 | ||
5955102c | 431 | LASSERT(!inode_trylock(inode)); |
d7e09d03 PT |
432 | } |
433 | ||
434 | static int vvp_transient_page_own(const struct lu_env *env, | |
435 | const struct cl_page_slice *slice, | |
436 | struct cl_io *unused, int nonblock) | |
437 | { | |
438 | vvp_transient_page_verify(slice->cpl_page); | |
439 | return 0; | |
440 | } | |
441 | ||
442 | static void vvp_transient_page_assume(const struct lu_env *env, | |
443 | const struct cl_page_slice *slice, | |
444 | struct cl_io *unused) | |
445 | { | |
446 | vvp_transient_page_verify(slice->cpl_page); | |
447 | } | |
448 | ||
449 | static void vvp_transient_page_unassume(const struct lu_env *env, | |
450 | const struct cl_page_slice *slice, | |
451 | struct cl_io *unused) | |
452 | { | |
453 | vvp_transient_page_verify(slice->cpl_page); | |
454 | } | |
455 | ||
456 | static void vvp_transient_page_disown(const struct lu_env *env, | |
457 | const struct cl_page_slice *slice, | |
458 | struct cl_io *unused) | |
459 | { | |
460 | vvp_transient_page_verify(slice->cpl_page); | |
461 | } | |
462 | ||
463 | static void vvp_transient_page_discard(const struct lu_env *env, | |
464 | const struct cl_page_slice *slice, | |
465 | struct cl_io *unused) | |
466 | { | |
467 | struct cl_page *page = slice->cpl_page; | |
468 | ||
469 | vvp_transient_page_verify(slice->cpl_page); | |
470 | ||
471 | /* | |
472 | * For transient pages, remove it from the radix tree. | |
473 | */ | |
474 | cl_page_delete(env, page); | |
475 | } | |
476 | ||
477 | static int vvp_transient_page_is_vmlocked(const struct lu_env *env, | |
478 | const struct cl_page_slice *slice) | |
479 | { | |
480 | struct inode *inode = ccc_object_inode(slice->cpl_obj); | |
481 | int locked; | |
482 | ||
5955102c | 483 | locked = !inode_trylock(inode); |
d7e09d03 | 484 | if (!locked) |
5955102c | 485 | inode_unlock(inode); |
d7e09d03 PT |
486 | return locked ? -EBUSY : -ENODATA; |
487 | } | |
488 | ||
489 | static void | |
490 | vvp_transient_page_completion(const struct lu_env *env, | |
491 | const struct cl_page_slice *slice, | |
492 | int ioret) | |
493 | { | |
494 | vvp_transient_page_verify(slice->cpl_page); | |
495 | } | |
496 | ||
497 | static void vvp_transient_page_fini(const struct lu_env *env, | |
498 | struct cl_page_slice *slice) | |
499 | { | |
500 | struct ccc_page *cp = cl2ccc_page(slice); | |
501 | struct cl_page *clp = slice->cpl_page; | |
502 | struct ccc_object *clobj = cl2ccc(clp->cp_obj); | |
503 | ||
504 | vvp_page_fini_common(cp); | |
5955102c | 505 | LASSERT(!inode_trylock(clobj->cob_inode)); |
d7e09d03 PT |
506 | clobj->cob_transient_pages--; |
507 | } | |
508 | ||
509 | static const struct cl_page_operations vvp_transient_page_ops = { | |
510 | .cpo_own = vvp_transient_page_own, | |
511 | .cpo_assume = vvp_transient_page_assume, | |
512 | .cpo_unassume = vvp_transient_page_unassume, | |
513 | .cpo_disown = vvp_transient_page_disown, | |
514 | .cpo_discard = vvp_transient_page_discard, | |
515 | .cpo_vmpage = ccc_page_vmpage, | |
516 | .cpo_fini = vvp_transient_page_fini, | |
517 | .cpo_is_vmlocked = vvp_transient_page_is_vmlocked, | |
518 | .cpo_print = vvp_page_print, | |
519 | .cpo_is_under_lock = ccc_page_is_under_lock, | |
520 | .io = { | |
521 | [CRT_READ] = { | |
522 | .cpo_prep = ccc_transient_page_prep, | |
523 | .cpo_completion = vvp_transient_page_completion, | |
524 | }, | |
525 | [CRT_WRITE] = { | |
526 | .cpo_prep = ccc_transient_page_prep, | |
527 | .cpo_completion = vvp_transient_page_completion, | |
528 | } | |
529 | } | |
530 | }; | |
531 | ||
532 | int vvp_page_init(const struct lu_env *env, struct cl_object *obj, | |
533 | struct cl_page *page, struct page *vmpage) | |
534 | { | |
535 | struct ccc_page *cpg = cl_object_page_slice(obj, page); | |
536 | ||
537 | CLOBINVRNT(env, obj, ccc_object_invariant(obj)); | |
538 | ||
539 | cpg->cpg_page = vmpage; | |
540 | page_cache_get(vmpage); | |
541 | ||
542 | INIT_LIST_HEAD(&cpg->cpg_pending_linkage); | |
543 | if (page->cp_type == CPT_CACHEABLE) { | |
544 | SetPagePrivate(vmpage); | |
545 | vmpage->private = (unsigned long)page; | |
546 | cl_page_slice_add(page, &cpg->cpg_cl, obj, | |
547 | &vvp_page_ops); | |
548 | } else { | |
549 | struct ccc_object *clobj = cl2ccc(obj); | |
550 | ||
5955102c | 551 | LASSERT(!inode_trylock(clobj->cob_inode)); |
d7e09d03 PT |
552 | cl_page_slice_add(page, &cpg->cpg_cl, obj, |
553 | &vvp_transient_page_ops); | |
554 | clobj->cob_transient_pages++; | |
555 | } | |
556 | return 0; | |
557 | } |