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1#undef TRACE_SYSTEM
2#define TRACE_SYSTEM writeback
3
4#if !defined(_TRACE_WRITEBACK_H) || defined(TRACE_HEADER_MULTI_READ)
5#define _TRACE_WRITEBACK_H
6
7#include <linux/tracepoint.h>
8#include <linux/backing-dev.h>
9#include <linux/writeback.h>
10
11#define show_inode_state(state) \
12 __print_flags(state, "|", \
13 {I_DIRTY_SYNC, "I_DIRTY_SYNC"}, \
14 {I_DIRTY_DATASYNC, "I_DIRTY_DATASYNC"}, \
15 {I_DIRTY_PAGES, "I_DIRTY_PAGES"}, \
16 {I_NEW, "I_NEW"}, \
17 {I_WILL_FREE, "I_WILL_FREE"}, \
18 {I_FREEING, "I_FREEING"}, \
19 {I_CLEAR, "I_CLEAR"}, \
20 {I_SYNC, "I_SYNC"}, \
21 {I_DIRTY_TIME, "I_DIRTY_TIME"}, \
22 {I_DIRTY_TIME_EXPIRED, "I_DIRTY_TIME_EXPIRED"}, \
23 {I_REFERENCED, "I_REFERENCED"} \
24 )
25
26/* enums need to be exported to user space */
27#undef EM
28#undef EMe
29#define EM(a,b) TRACE_DEFINE_ENUM(a);
30#define EMe(a,b) TRACE_DEFINE_ENUM(a);
31
32#define WB_WORK_REASON \
33 EM( WB_REASON_BACKGROUND, "background") \
34 EM( WB_REASON_TRY_TO_FREE_PAGES, "try_to_free_pages") \
35 EM( WB_REASON_SYNC, "sync") \
36 EM( WB_REASON_PERIODIC, "periodic") \
37 EM( WB_REASON_LAPTOP_TIMER, "laptop_timer") \
38 EM( WB_REASON_FREE_MORE_MEM, "free_more_memory") \
39 EM( WB_REASON_FS_FREE_SPACE, "fs_free_space") \
40 EMe(WB_REASON_FORKER_THREAD, "forker_thread")
41
42WB_WORK_REASON
43
44/*
45 * Now redefine the EM() and EMe() macros to map the enums to the strings
46 * that will be printed in the output.
47 */
48#undef EM
49#undef EMe
50#define EM(a,b) { a, b },
51#define EMe(a,b) { a, b }
52
53struct wb_writeback_work;
54
55TRACE_EVENT(writeback_dirty_page,
56
57 TP_PROTO(struct page *page, struct address_space *mapping),
58
59 TP_ARGS(page, mapping),
60
61 TP_STRUCT__entry (
62 __array(char, name, 32)
63 __field(unsigned long, ino)
64 __field(pgoff_t, index)
65 ),
66
67 TP_fast_assign(
68 strncpy(__entry->name,
69 mapping ? dev_name(inode_to_bdi(mapping->host)->dev) : "(unknown)", 32);
70 __entry->ino = mapping ? mapping->host->i_ino : 0;
71 __entry->index = page->index;
72 ),
73
74 TP_printk("bdi %s: ino=%lu index=%lu",
75 __entry->name,
76 __entry->ino,
77 __entry->index
78 )
79);
80
81DECLARE_EVENT_CLASS(writeback_dirty_inode_template,
82
83 TP_PROTO(struct inode *inode, int flags),
84
85 TP_ARGS(inode, flags),
86
87 TP_STRUCT__entry (
88 __array(char, name, 32)
89 __field(unsigned long, ino)
90 __field(unsigned long, state)
91 __field(unsigned long, flags)
92 ),
93
94 TP_fast_assign(
95 struct backing_dev_info *bdi = inode_to_bdi(inode);
96
97 /* may be called for files on pseudo FSes w/ unregistered bdi */
98 strncpy(__entry->name,
99 bdi->dev ? dev_name(bdi->dev) : "(unknown)", 32);
100 __entry->ino = inode->i_ino;
101 __entry->state = inode->i_state;
102 __entry->flags = flags;
103 ),
104
105 TP_printk("bdi %s: ino=%lu state=%s flags=%s",
106 __entry->name,
107 __entry->ino,
108 show_inode_state(__entry->state),
109 show_inode_state(__entry->flags)
110 )
111);
112
113DEFINE_EVENT(writeback_dirty_inode_template, writeback_mark_inode_dirty,
114
115 TP_PROTO(struct inode *inode, int flags),
116
117 TP_ARGS(inode, flags)
118);
119
120DEFINE_EVENT(writeback_dirty_inode_template, writeback_dirty_inode_start,
121
122 TP_PROTO(struct inode *inode, int flags),
123
124 TP_ARGS(inode, flags)
125);
126
127DEFINE_EVENT(writeback_dirty_inode_template, writeback_dirty_inode,
128
129 TP_PROTO(struct inode *inode, int flags),
130
131 TP_ARGS(inode, flags)
132);
133
134#ifdef CREATE_TRACE_POINTS
135#ifdef CONFIG_CGROUP_WRITEBACK
136
137static inline unsigned int __trace_wb_assign_cgroup(struct bdi_writeback *wb)
138{
139 return wb->memcg_css->cgroup->kn->ino;
140}
141
142static inline unsigned int __trace_wbc_assign_cgroup(struct writeback_control *wbc)
143{
144 if (wbc->wb)
145 return __trace_wb_assign_cgroup(wbc->wb);
146 else
147 return -1U;
148}
149#else /* CONFIG_CGROUP_WRITEBACK */
150
151static inline unsigned int __trace_wb_assign_cgroup(struct bdi_writeback *wb)
152{
153 return -1U;
154}
155
156static inline unsigned int __trace_wbc_assign_cgroup(struct writeback_control *wbc)
157{
158 return -1U;
159}
160
161#endif /* CONFIG_CGROUP_WRITEBACK */
162#endif /* CREATE_TRACE_POINTS */
163
164DECLARE_EVENT_CLASS(writeback_write_inode_template,
165
166 TP_PROTO(struct inode *inode, struct writeback_control *wbc),
167
168 TP_ARGS(inode, wbc),
169
170 TP_STRUCT__entry (
171 __array(char, name, 32)
172 __field(unsigned long, ino)
173 __field(int, sync_mode)
174 __field(unsigned int, cgroup_ino)
175 ),
176
177 TP_fast_assign(
178 strncpy(__entry->name,
179 dev_name(inode_to_bdi(inode)->dev), 32);
180 __entry->ino = inode->i_ino;
181 __entry->sync_mode = wbc->sync_mode;
182 __entry->cgroup_ino = __trace_wbc_assign_cgroup(wbc);
183 ),
184
185 TP_printk("bdi %s: ino=%lu sync_mode=%d cgroup_ino=%u",
186 __entry->name,
187 __entry->ino,
188 __entry->sync_mode,
189 __entry->cgroup_ino
190 )
191);
192
193DEFINE_EVENT(writeback_write_inode_template, writeback_write_inode_start,
194
195 TP_PROTO(struct inode *inode, struct writeback_control *wbc),
196
197 TP_ARGS(inode, wbc)
198);
199
200DEFINE_EVENT(writeback_write_inode_template, writeback_write_inode,
201
202 TP_PROTO(struct inode *inode, struct writeback_control *wbc),
203
204 TP_ARGS(inode, wbc)
205);
206
207DECLARE_EVENT_CLASS(writeback_work_class,
208 TP_PROTO(struct bdi_writeback *wb, struct wb_writeback_work *work),
209 TP_ARGS(wb, work),
210 TP_STRUCT__entry(
211 __array(char, name, 32)
212 __field(long, nr_pages)
213 __field(dev_t, sb_dev)
214 __field(int, sync_mode)
215 __field(int, for_kupdate)
216 __field(int, range_cyclic)
217 __field(int, for_background)
218 __field(int, reason)
219 __field(unsigned int, cgroup_ino)
220 ),
221 TP_fast_assign(
222 strncpy(__entry->name,
223 wb->bdi->dev ? dev_name(wb->bdi->dev) : "(unknown)", 32);
224 __entry->nr_pages = work->nr_pages;
225 __entry->sb_dev = work->sb ? work->sb->s_dev : 0;
226 __entry->sync_mode = work->sync_mode;
227 __entry->for_kupdate = work->for_kupdate;
228 __entry->range_cyclic = work->range_cyclic;
229 __entry->for_background = work->for_background;
230 __entry->reason = work->reason;
231 __entry->cgroup_ino = __trace_wb_assign_cgroup(wb);
232 ),
233 TP_printk("bdi %s: sb_dev %d:%d nr_pages=%ld sync_mode=%d "
234 "kupdate=%d range_cyclic=%d background=%d reason=%s cgroup_ino=%u",
235 __entry->name,
236 MAJOR(__entry->sb_dev), MINOR(__entry->sb_dev),
237 __entry->nr_pages,
238 __entry->sync_mode,
239 __entry->for_kupdate,
240 __entry->range_cyclic,
241 __entry->for_background,
242 __print_symbolic(__entry->reason, WB_WORK_REASON),
243 __entry->cgroup_ino
244 )
245);
246#define DEFINE_WRITEBACK_WORK_EVENT(name) \
247DEFINE_EVENT(writeback_work_class, name, \
248 TP_PROTO(struct bdi_writeback *wb, struct wb_writeback_work *work), \
249 TP_ARGS(wb, work))
250DEFINE_WRITEBACK_WORK_EVENT(writeback_queue);
251DEFINE_WRITEBACK_WORK_EVENT(writeback_exec);
252DEFINE_WRITEBACK_WORK_EVENT(writeback_start);
253DEFINE_WRITEBACK_WORK_EVENT(writeback_written);
254DEFINE_WRITEBACK_WORK_EVENT(writeback_wait);
255
256TRACE_EVENT(writeback_pages_written,
257 TP_PROTO(long pages_written),
258 TP_ARGS(pages_written),
259 TP_STRUCT__entry(
260 __field(long, pages)
261 ),
262 TP_fast_assign(
263 __entry->pages = pages_written;
264 ),
265 TP_printk("%ld", __entry->pages)
266);
267
268DECLARE_EVENT_CLASS(writeback_class,
269 TP_PROTO(struct bdi_writeback *wb),
270 TP_ARGS(wb),
271 TP_STRUCT__entry(
272 __array(char, name, 32)
273 __field(unsigned int, cgroup_ino)
274 ),
275 TP_fast_assign(
276 strncpy(__entry->name, dev_name(wb->bdi->dev), 32);
277 __entry->cgroup_ino = __trace_wb_assign_cgroup(wb);
278 ),
279 TP_printk("bdi %s: cgroup_ino=%u",
280 __entry->name,
281 __entry->cgroup_ino
282 )
283);
284#define DEFINE_WRITEBACK_EVENT(name) \
285DEFINE_EVENT(writeback_class, name, \
286 TP_PROTO(struct bdi_writeback *wb), \
287 TP_ARGS(wb))
288
289DEFINE_WRITEBACK_EVENT(writeback_nowork);
290DEFINE_WRITEBACK_EVENT(writeback_wake_background);
291
292TRACE_EVENT(writeback_bdi_register,
293 TP_PROTO(struct backing_dev_info *bdi),
294 TP_ARGS(bdi),
295 TP_STRUCT__entry(
296 __array(char, name, 32)
297 ),
298 TP_fast_assign(
299 strncpy(__entry->name, dev_name(bdi->dev), 32);
300 ),
301 TP_printk("bdi %s",
302 __entry->name
303 )
304);
305
306DECLARE_EVENT_CLASS(wbc_class,
307 TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi),
308 TP_ARGS(wbc, bdi),
309 TP_STRUCT__entry(
310 __array(char, name, 32)
311 __field(long, nr_to_write)
312 __field(long, pages_skipped)
313 __field(int, sync_mode)
314 __field(int, for_kupdate)
315 __field(int, for_background)
316 __field(int, for_reclaim)
317 __field(int, range_cyclic)
318 __field(long, range_start)
319 __field(long, range_end)
320 __field(unsigned int, cgroup_ino)
321 ),
322
323 TP_fast_assign(
324 strncpy(__entry->name, dev_name(bdi->dev), 32);
325 __entry->nr_to_write = wbc->nr_to_write;
326 __entry->pages_skipped = wbc->pages_skipped;
327 __entry->sync_mode = wbc->sync_mode;
328 __entry->for_kupdate = wbc->for_kupdate;
329 __entry->for_background = wbc->for_background;
330 __entry->for_reclaim = wbc->for_reclaim;
331 __entry->range_cyclic = wbc->range_cyclic;
332 __entry->range_start = (long)wbc->range_start;
333 __entry->range_end = (long)wbc->range_end;
334 __entry->cgroup_ino = __trace_wbc_assign_cgroup(wbc);
335 ),
336
337 TP_printk("bdi %s: towrt=%ld skip=%ld mode=%d kupd=%d "
338 "bgrd=%d reclm=%d cyclic=%d "
339 "start=0x%lx end=0x%lx cgroup_ino=%u",
340 __entry->name,
341 __entry->nr_to_write,
342 __entry->pages_skipped,
343 __entry->sync_mode,
344 __entry->for_kupdate,
345 __entry->for_background,
346 __entry->for_reclaim,
347 __entry->range_cyclic,
348 __entry->range_start,
349 __entry->range_end,
350 __entry->cgroup_ino
351 )
352)
353
354#define DEFINE_WBC_EVENT(name) \
355DEFINE_EVENT(wbc_class, name, \
356 TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi), \
357 TP_ARGS(wbc, bdi))
358DEFINE_WBC_EVENT(wbc_writepage);
359
360TRACE_EVENT(writeback_queue_io,
361 TP_PROTO(struct bdi_writeback *wb,
362 struct wb_writeback_work *work,
363 int moved),
364 TP_ARGS(wb, work, moved),
365 TP_STRUCT__entry(
366 __array(char, name, 32)
367 __field(unsigned long, older)
368 __field(long, age)
369 __field(int, moved)
370 __field(int, reason)
371 __field(unsigned int, cgroup_ino)
372 ),
373 TP_fast_assign(
374 unsigned long *older_than_this = work->older_than_this;
375 strncpy(__entry->name, dev_name(wb->bdi->dev), 32);
376 __entry->older = older_than_this ? *older_than_this : 0;
377 __entry->age = older_than_this ?
378 (jiffies - *older_than_this) * 1000 / HZ : -1;
379 __entry->moved = moved;
380 __entry->reason = work->reason;
381 __entry->cgroup_ino = __trace_wb_assign_cgroup(wb);
382 ),
383 TP_printk("bdi %s: older=%lu age=%ld enqueue=%d reason=%s cgroup_ino=%u",
384 __entry->name,
385 __entry->older, /* older_than_this in jiffies */
386 __entry->age, /* older_than_this in relative milliseconds */
387 __entry->moved,
388 __print_symbolic(__entry->reason, WB_WORK_REASON),
389 __entry->cgroup_ino
390 )
391);
392
393TRACE_EVENT(global_dirty_state,
394
395 TP_PROTO(unsigned long background_thresh,
396 unsigned long dirty_thresh
397 ),
398
399 TP_ARGS(background_thresh,
400 dirty_thresh
401 ),
402
403 TP_STRUCT__entry(
404 __field(unsigned long, nr_dirty)
405 __field(unsigned long, nr_writeback)
406 __field(unsigned long, nr_unstable)
407 __field(unsigned long, background_thresh)
408 __field(unsigned long, dirty_thresh)
409 __field(unsigned long, dirty_limit)
410 __field(unsigned long, nr_dirtied)
411 __field(unsigned long, nr_written)
412 ),
413
414 TP_fast_assign(
415 __entry->nr_dirty = global_page_state(NR_FILE_DIRTY);
416 __entry->nr_writeback = global_page_state(NR_WRITEBACK);
417 __entry->nr_unstable = global_page_state(NR_UNSTABLE_NFS);
418 __entry->nr_dirtied = global_page_state(NR_DIRTIED);
419 __entry->nr_written = global_page_state(NR_WRITTEN);
420 __entry->background_thresh = background_thresh;
421 __entry->dirty_thresh = dirty_thresh;
422 __entry->dirty_limit = global_wb_domain.dirty_limit;
423 ),
424
425 TP_printk("dirty=%lu writeback=%lu unstable=%lu "
426 "bg_thresh=%lu thresh=%lu limit=%lu "
427 "dirtied=%lu written=%lu",
428 __entry->nr_dirty,
429 __entry->nr_writeback,
430 __entry->nr_unstable,
431 __entry->background_thresh,
432 __entry->dirty_thresh,
433 __entry->dirty_limit,
434 __entry->nr_dirtied,
435 __entry->nr_written
436 )
437);
438
439#define KBps(x) ((x) << (PAGE_SHIFT - 10))
440
441TRACE_EVENT(bdi_dirty_ratelimit,
442
443 TP_PROTO(struct bdi_writeback *wb,
444 unsigned long dirty_rate,
445 unsigned long task_ratelimit),
446
447 TP_ARGS(wb, dirty_rate, task_ratelimit),
448
449 TP_STRUCT__entry(
450 __array(char, bdi, 32)
451 __field(unsigned long, write_bw)
452 __field(unsigned long, avg_write_bw)
453 __field(unsigned long, dirty_rate)
454 __field(unsigned long, dirty_ratelimit)
455 __field(unsigned long, task_ratelimit)
456 __field(unsigned long, balanced_dirty_ratelimit)
457 __field(unsigned int, cgroup_ino)
458 ),
459
460 TP_fast_assign(
461 strlcpy(__entry->bdi, dev_name(wb->bdi->dev), 32);
462 __entry->write_bw = KBps(wb->write_bandwidth);
463 __entry->avg_write_bw = KBps(wb->avg_write_bandwidth);
464 __entry->dirty_rate = KBps(dirty_rate);
465 __entry->dirty_ratelimit = KBps(wb->dirty_ratelimit);
466 __entry->task_ratelimit = KBps(task_ratelimit);
467 __entry->balanced_dirty_ratelimit =
468 KBps(wb->balanced_dirty_ratelimit);
469 __entry->cgroup_ino = __trace_wb_assign_cgroup(wb);
470 ),
471
472 TP_printk("bdi %s: "
473 "write_bw=%lu awrite_bw=%lu dirty_rate=%lu "
474 "dirty_ratelimit=%lu task_ratelimit=%lu "
475 "balanced_dirty_ratelimit=%lu cgroup_ino=%u",
476 __entry->bdi,
477 __entry->write_bw, /* write bandwidth */
478 __entry->avg_write_bw, /* avg write bandwidth */
479 __entry->dirty_rate, /* bdi dirty rate */
480 __entry->dirty_ratelimit, /* base ratelimit */
481 __entry->task_ratelimit, /* ratelimit with position control */
482 __entry->balanced_dirty_ratelimit, /* the balanced ratelimit */
483 __entry->cgroup_ino
484 )
485);
486
487TRACE_EVENT(balance_dirty_pages,
488
489 TP_PROTO(struct bdi_writeback *wb,
490 unsigned long thresh,
491 unsigned long bg_thresh,
492 unsigned long dirty,
493 unsigned long bdi_thresh,
494 unsigned long bdi_dirty,
495 unsigned long dirty_ratelimit,
496 unsigned long task_ratelimit,
497 unsigned long dirtied,
498 unsigned long period,
499 long pause,
500 unsigned long start_time),
501
502 TP_ARGS(wb, thresh, bg_thresh, dirty, bdi_thresh, bdi_dirty,
503 dirty_ratelimit, task_ratelimit,
504 dirtied, period, pause, start_time),
505
506 TP_STRUCT__entry(
507 __array( char, bdi, 32)
508 __field(unsigned long, limit)
509 __field(unsigned long, setpoint)
510 __field(unsigned long, dirty)
511 __field(unsigned long, bdi_setpoint)
512 __field(unsigned long, bdi_dirty)
513 __field(unsigned long, dirty_ratelimit)
514 __field(unsigned long, task_ratelimit)
515 __field(unsigned int, dirtied)
516 __field(unsigned int, dirtied_pause)
517 __field(unsigned long, paused)
518 __field( long, pause)
519 __field(unsigned long, period)
520 __field( long, think)
521 __field(unsigned int, cgroup_ino)
522 ),
523
524 TP_fast_assign(
525 unsigned long freerun = (thresh + bg_thresh) / 2;
526 strlcpy(__entry->bdi, dev_name(wb->bdi->dev), 32);
527
528 __entry->limit = global_wb_domain.dirty_limit;
529 __entry->setpoint = (global_wb_domain.dirty_limit +
530 freerun) / 2;
531 __entry->dirty = dirty;
532 __entry->bdi_setpoint = __entry->setpoint *
533 bdi_thresh / (thresh + 1);
534 __entry->bdi_dirty = bdi_dirty;
535 __entry->dirty_ratelimit = KBps(dirty_ratelimit);
536 __entry->task_ratelimit = KBps(task_ratelimit);
537 __entry->dirtied = dirtied;
538 __entry->dirtied_pause = current->nr_dirtied_pause;
539 __entry->think = current->dirty_paused_when == 0 ? 0 :
540 (long)(jiffies - current->dirty_paused_when) * 1000/HZ;
541 __entry->period = period * 1000 / HZ;
542 __entry->pause = pause * 1000 / HZ;
543 __entry->paused = (jiffies - start_time) * 1000 / HZ;
544 __entry->cgroup_ino = __trace_wb_assign_cgroup(wb);
545 ),
546
547
548 TP_printk("bdi %s: "
549 "limit=%lu setpoint=%lu dirty=%lu "
550 "bdi_setpoint=%lu bdi_dirty=%lu "
551 "dirty_ratelimit=%lu task_ratelimit=%lu "
552 "dirtied=%u dirtied_pause=%u "
553 "paused=%lu pause=%ld period=%lu think=%ld cgroup_ino=%u",
554 __entry->bdi,
555 __entry->limit,
556 __entry->setpoint,
557 __entry->dirty,
558 __entry->bdi_setpoint,
559 __entry->bdi_dirty,
560 __entry->dirty_ratelimit,
561 __entry->task_ratelimit,
562 __entry->dirtied,
563 __entry->dirtied_pause,
564 __entry->paused, /* ms */
565 __entry->pause, /* ms */
566 __entry->period, /* ms */
567 __entry->think, /* ms */
568 __entry->cgroup_ino
569 )
570);
571
572TRACE_EVENT(writeback_sb_inodes_requeue,
573
574 TP_PROTO(struct inode *inode),
575 TP_ARGS(inode),
576
577 TP_STRUCT__entry(
578 __array(char, name, 32)
579 __field(unsigned long, ino)
580 __field(unsigned long, state)
581 __field(unsigned long, dirtied_when)
582 __field(unsigned int, cgroup_ino)
583 ),
584
585 TP_fast_assign(
586 strncpy(__entry->name,
587 dev_name(inode_to_bdi(inode)->dev), 32);
588 __entry->ino = inode->i_ino;
589 __entry->state = inode->i_state;
590 __entry->dirtied_when = inode->dirtied_when;
591 __entry->cgroup_ino = __trace_wb_assign_cgroup(inode_to_wb(inode));
592 ),
593
594 TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu cgroup_ino=%u",
595 __entry->name,
596 __entry->ino,
597 show_inode_state(__entry->state),
598 __entry->dirtied_when,
599 (jiffies - __entry->dirtied_when) / HZ,
600 __entry->cgroup_ino
601 )
602);
603
604DECLARE_EVENT_CLASS(writeback_congest_waited_template,
605
606 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
607
608 TP_ARGS(usec_timeout, usec_delayed),
609
610 TP_STRUCT__entry(
611 __field( unsigned int, usec_timeout )
612 __field( unsigned int, usec_delayed )
613 ),
614
615 TP_fast_assign(
616 __entry->usec_timeout = usec_timeout;
617 __entry->usec_delayed = usec_delayed;
618 ),
619
620 TP_printk("usec_timeout=%u usec_delayed=%u",
621 __entry->usec_timeout,
622 __entry->usec_delayed)
623);
624
625DEFINE_EVENT(writeback_congest_waited_template, writeback_congestion_wait,
626
627 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
628
629 TP_ARGS(usec_timeout, usec_delayed)
630);
631
632DEFINE_EVENT(writeback_congest_waited_template, writeback_wait_iff_congested,
633
634 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
635
636 TP_ARGS(usec_timeout, usec_delayed)
637);
638
639DECLARE_EVENT_CLASS(writeback_single_inode_template,
640
641 TP_PROTO(struct inode *inode,
642 struct writeback_control *wbc,
643 unsigned long nr_to_write
644 ),
645
646 TP_ARGS(inode, wbc, nr_to_write),
647
648 TP_STRUCT__entry(
649 __array(char, name, 32)
650 __field(unsigned long, ino)
651 __field(unsigned long, state)
652 __field(unsigned long, dirtied_when)
653 __field(unsigned long, writeback_index)
654 __field(long, nr_to_write)
655 __field(unsigned long, wrote)
656 __field(unsigned int, cgroup_ino)
657 ),
658
659 TP_fast_assign(
660 strncpy(__entry->name,
661 dev_name(inode_to_bdi(inode)->dev), 32);
662 __entry->ino = inode->i_ino;
663 __entry->state = inode->i_state;
664 __entry->dirtied_when = inode->dirtied_when;
665 __entry->writeback_index = inode->i_mapping->writeback_index;
666 __entry->nr_to_write = nr_to_write;
667 __entry->wrote = nr_to_write - wbc->nr_to_write;
668 __entry->cgroup_ino = __trace_wbc_assign_cgroup(wbc);
669 ),
670
671 TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu "
672 "index=%lu to_write=%ld wrote=%lu cgroup_ino=%u",
673 __entry->name,
674 __entry->ino,
675 show_inode_state(__entry->state),
676 __entry->dirtied_when,
677 (jiffies - __entry->dirtied_when) / HZ,
678 __entry->writeback_index,
679 __entry->nr_to_write,
680 __entry->wrote,
681 __entry->cgroup_ino
682 )
683);
684
685DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode_start,
686 TP_PROTO(struct inode *inode,
687 struct writeback_control *wbc,
688 unsigned long nr_to_write),
689 TP_ARGS(inode, wbc, nr_to_write)
690);
691
692DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode,
693 TP_PROTO(struct inode *inode,
694 struct writeback_control *wbc,
695 unsigned long nr_to_write),
696 TP_ARGS(inode, wbc, nr_to_write)
697);
698
699DECLARE_EVENT_CLASS(writeback_lazytime_template,
700 TP_PROTO(struct inode *inode),
701
702 TP_ARGS(inode),
703
704 TP_STRUCT__entry(
705 __field( dev_t, dev )
706 __field(unsigned long, ino )
707 __field(unsigned long, state )
708 __field( __u16, mode )
709 __field(unsigned long, dirtied_when )
710 ),
711
712 TP_fast_assign(
713 __entry->dev = inode->i_sb->s_dev;
714 __entry->ino = inode->i_ino;
715 __entry->state = inode->i_state;
716 __entry->mode = inode->i_mode;
717 __entry->dirtied_when = inode->dirtied_when;
718 ),
719
720 TP_printk("dev %d,%d ino %lu dirtied %lu state %s mode 0%o",
721 MAJOR(__entry->dev), MINOR(__entry->dev),
722 __entry->ino, __entry->dirtied_when,
723 show_inode_state(__entry->state), __entry->mode)
724);
725
726DEFINE_EVENT(writeback_lazytime_template, writeback_lazytime,
727 TP_PROTO(struct inode *inode),
728
729 TP_ARGS(inode)
730);
731
732DEFINE_EVENT(writeback_lazytime_template, writeback_lazytime_iput,
733 TP_PROTO(struct inode *inode),
734
735 TP_ARGS(inode)
736);
737
738DEFINE_EVENT(writeback_lazytime_template, writeback_dirty_inode_enqueue,
739
740 TP_PROTO(struct inode *inode),
741
742 TP_ARGS(inode)
743);
744
745#endif /* _TRACE_WRITEBACK_H */
746
747/* This part must be outside protection */
748#include <trace/define_trace.h>
1#undef TRACE_SYSTEM
2#define TRACE_SYSTEM writeback
3
4#if !defined(_TRACE_WRITEBACK_H) || defined(TRACE_HEADER_MULTI_READ)
5#define _TRACE_WRITEBACK_H
6
7#include <linux/backing-dev.h>
8#include <linux/writeback.h>
9
10#define show_inode_state(state) \
11 __print_flags(state, "|", \
12 {I_DIRTY_SYNC, "I_DIRTY_SYNC"}, \
13 {I_DIRTY_DATASYNC, "I_DIRTY_DATASYNC"}, \
14 {I_DIRTY_PAGES, "I_DIRTY_PAGES"}, \
15 {I_NEW, "I_NEW"}, \
16 {I_WILL_FREE, "I_WILL_FREE"}, \
17 {I_FREEING, "I_FREEING"}, \
18 {I_CLEAR, "I_CLEAR"}, \
19 {I_SYNC, "I_SYNC"}, \
20 {I_REFERENCED, "I_REFERENCED"} \
21 )
22
23#define WB_WORK_REASON \
24 {WB_REASON_BACKGROUND, "background"}, \
25 {WB_REASON_TRY_TO_FREE_PAGES, "try_to_free_pages"}, \
26 {WB_REASON_SYNC, "sync"}, \
27 {WB_REASON_PERIODIC, "periodic"}, \
28 {WB_REASON_LAPTOP_TIMER, "laptop_timer"}, \
29 {WB_REASON_FREE_MORE_MEM, "free_more_memory"}, \
30 {WB_REASON_FS_FREE_SPACE, "fs_free_space"}, \
31 {WB_REASON_FORKER_THREAD, "forker_thread"}
32
33struct wb_writeback_work;
34
35DECLARE_EVENT_CLASS(writeback_work_class,
36 TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work),
37 TP_ARGS(bdi, work),
38 TP_STRUCT__entry(
39 __array(char, name, 32)
40 __field(long, nr_pages)
41 __field(dev_t, sb_dev)
42 __field(int, sync_mode)
43 __field(int, for_kupdate)
44 __field(int, range_cyclic)
45 __field(int, for_background)
46 __field(int, reason)
47 ),
48 TP_fast_assign(
49 struct device *dev = bdi->dev;
50 if (!dev)
51 dev = default_backing_dev_info.dev;
52 strncpy(__entry->name, dev_name(dev), 32);
53 __entry->nr_pages = work->nr_pages;
54 __entry->sb_dev = work->sb ? work->sb->s_dev : 0;
55 __entry->sync_mode = work->sync_mode;
56 __entry->for_kupdate = work->for_kupdate;
57 __entry->range_cyclic = work->range_cyclic;
58 __entry->for_background = work->for_background;
59 __entry->reason = work->reason;
60 ),
61 TP_printk("bdi %s: sb_dev %d:%d nr_pages=%ld sync_mode=%d "
62 "kupdate=%d range_cyclic=%d background=%d reason=%s",
63 __entry->name,
64 MAJOR(__entry->sb_dev), MINOR(__entry->sb_dev),
65 __entry->nr_pages,
66 __entry->sync_mode,
67 __entry->for_kupdate,
68 __entry->range_cyclic,
69 __entry->for_background,
70 __print_symbolic(__entry->reason, WB_WORK_REASON)
71 )
72);
73#define DEFINE_WRITEBACK_WORK_EVENT(name) \
74DEFINE_EVENT(writeback_work_class, name, \
75 TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work), \
76 TP_ARGS(bdi, work))
77DEFINE_WRITEBACK_WORK_EVENT(writeback_nothread);
78DEFINE_WRITEBACK_WORK_EVENT(writeback_queue);
79DEFINE_WRITEBACK_WORK_EVENT(writeback_exec);
80DEFINE_WRITEBACK_WORK_EVENT(writeback_start);
81DEFINE_WRITEBACK_WORK_EVENT(writeback_written);
82DEFINE_WRITEBACK_WORK_EVENT(writeback_wait);
83
84TRACE_EVENT(writeback_pages_written,
85 TP_PROTO(long pages_written),
86 TP_ARGS(pages_written),
87 TP_STRUCT__entry(
88 __field(long, pages)
89 ),
90 TP_fast_assign(
91 __entry->pages = pages_written;
92 ),
93 TP_printk("%ld", __entry->pages)
94);
95
96DECLARE_EVENT_CLASS(writeback_class,
97 TP_PROTO(struct backing_dev_info *bdi),
98 TP_ARGS(bdi),
99 TP_STRUCT__entry(
100 __array(char, name, 32)
101 ),
102 TP_fast_assign(
103 strncpy(__entry->name, dev_name(bdi->dev), 32);
104 ),
105 TP_printk("bdi %s",
106 __entry->name
107 )
108);
109#define DEFINE_WRITEBACK_EVENT(name) \
110DEFINE_EVENT(writeback_class, name, \
111 TP_PROTO(struct backing_dev_info *bdi), \
112 TP_ARGS(bdi))
113
114DEFINE_WRITEBACK_EVENT(writeback_nowork);
115DEFINE_WRITEBACK_EVENT(writeback_wake_background);
116DEFINE_WRITEBACK_EVENT(writeback_wake_thread);
117DEFINE_WRITEBACK_EVENT(writeback_wake_forker_thread);
118DEFINE_WRITEBACK_EVENT(writeback_bdi_register);
119DEFINE_WRITEBACK_EVENT(writeback_bdi_unregister);
120DEFINE_WRITEBACK_EVENT(writeback_thread_start);
121DEFINE_WRITEBACK_EVENT(writeback_thread_stop);
122
123DECLARE_EVENT_CLASS(wbc_class,
124 TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi),
125 TP_ARGS(wbc, bdi),
126 TP_STRUCT__entry(
127 __array(char, name, 32)
128 __field(long, nr_to_write)
129 __field(long, pages_skipped)
130 __field(int, sync_mode)
131 __field(int, for_kupdate)
132 __field(int, for_background)
133 __field(int, for_reclaim)
134 __field(int, range_cyclic)
135 __field(long, range_start)
136 __field(long, range_end)
137 ),
138
139 TP_fast_assign(
140 strncpy(__entry->name, dev_name(bdi->dev), 32);
141 __entry->nr_to_write = wbc->nr_to_write;
142 __entry->pages_skipped = wbc->pages_skipped;
143 __entry->sync_mode = wbc->sync_mode;
144 __entry->for_kupdate = wbc->for_kupdate;
145 __entry->for_background = wbc->for_background;
146 __entry->for_reclaim = wbc->for_reclaim;
147 __entry->range_cyclic = wbc->range_cyclic;
148 __entry->range_start = (long)wbc->range_start;
149 __entry->range_end = (long)wbc->range_end;
150 ),
151
152 TP_printk("bdi %s: towrt=%ld skip=%ld mode=%d kupd=%d "
153 "bgrd=%d reclm=%d cyclic=%d "
154 "start=0x%lx end=0x%lx",
155 __entry->name,
156 __entry->nr_to_write,
157 __entry->pages_skipped,
158 __entry->sync_mode,
159 __entry->for_kupdate,
160 __entry->for_background,
161 __entry->for_reclaim,
162 __entry->range_cyclic,
163 __entry->range_start,
164 __entry->range_end)
165)
166
167#define DEFINE_WBC_EVENT(name) \
168DEFINE_EVENT(wbc_class, name, \
169 TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi), \
170 TP_ARGS(wbc, bdi))
171DEFINE_WBC_EVENT(wbc_writepage);
172
173TRACE_EVENT(writeback_queue_io,
174 TP_PROTO(struct bdi_writeback *wb,
175 struct wb_writeback_work *work,
176 int moved),
177 TP_ARGS(wb, work, moved),
178 TP_STRUCT__entry(
179 __array(char, name, 32)
180 __field(unsigned long, older)
181 __field(long, age)
182 __field(int, moved)
183 __field(int, reason)
184 ),
185 TP_fast_assign(
186 unsigned long *older_than_this = work->older_than_this;
187 strncpy(__entry->name, dev_name(wb->bdi->dev), 32);
188 __entry->older = older_than_this ? *older_than_this : 0;
189 __entry->age = older_than_this ?
190 (jiffies - *older_than_this) * 1000 / HZ : -1;
191 __entry->moved = moved;
192 __entry->reason = work->reason;
193 ),
194 TP_printk("bdi %s: older=%lu age=%ld enqueue=%d reason=%s",
195 __entry->name,
196 __entry->older, /* older_than_this in jiffies */
197 __entry->age, /* older_than_this in relative milliseconds */
198 __entry->moved,
199 __print_symbolic(__entry->reason, WB_WORK_REASON)
200 )
201);
202
203TRACE_EVENT(global_dirty_state,
204
205 TP_PROTO(unsigned long background_thresh,
206 unsigned long dirty_thresh
207 ),
208
209 TP_ARGS(background_thresh,
210 dirty_thresh
211 ),
212
213 TP_STRUCT__entry(
214 __field(unsigned long, nr_dirty)
215 __field(unsigned long, nr_writeback)
216 __field(unsigned long, nr_unstable)
217 __field(unsigned long, background_thresh)
218 __field(unsigned long, dirty_thresh)
219 __field(unsigned long, dirty_limit)
220 __field(unsigned long, nr_dirtied)
221 __field(unsigned long, nr_written)
222 ),
223
224 TP_fast_assign(
225 __entry->nr_dirty = global_page_state(NR_FILE_DIRTY);
226 __entry->nr_writeback = global_page_state(NR_WRITEBACK);
227 __entry->nr_unstable = global_page_state(NR_UNSTABLE_NFS);
228 __entry->nr_dirtied = global_page_state(NR_DIRTIED);
229 __entry->nr_written = global_page_state(NR_WRITTEN);
230 __entry->background_thresh = background_thresh;
231 __entry->dirty_thresh = dirty_thresh;
232 __entry->dirty_limit = global_dirty_limit;
233 ),
234
235 TP_printk("dirty=%lu writeback=%lu unstable=%lu "
236 "bg_thresh=%lu thresh=%lu limit=%lu "
237 "dirtied=%lu written=%lu",
238 __entry->nr_dirty,
239 __entry->nr_writeback,
240 __entry->nr_unstable,
241 __entry->background_thresh,
242 __entry->dirty_thresh,
243 __entry->dirty_limit,
244 __entry->nr_dirtied,
245 __entry->nr_written
246 )
247);
248
249#define KBps(x) ((x) << (PAGE_SHIFT - 10))
250
251TRACE_EVENT(bdi_dirty_ratelimit,
252
253 TP_PROTO(struct backing_dev_info *bdi,
254 unsigned long dirty_rate,
255 unsigned long task_ratelimit),
256
257 TP_ARGS(bdi, dirty_rate, task_ratelimit),
258
259 TP_STRUCT__entry(
260 __array(char, bdi, 32)
261 __field(unsigned long, write_bw)
262 __field(unsigned long, avg_write_bw)
263 __field(unsigned long, dirty_rate)
264 __field(unsigned long, dirty_ratelimit)
265 __field(unsigned long, task_ratelimit)
266 __field(unsigned long, balanced_dirty_ratelimit)
267 ),
268
269 TP_fast_assign(
270 strlcpy(__entry->bdi, dev_name(bdi->dev), 32);
271 __entry->write_bw = KBps(bdi->write_bandwidth);
272 __entry->avg_write_bw = KBps(bdi->avg_write_bandwidth);
273 __entry->dirty_rate = KBps(dirty_rate);
274 __entry->dirty_ratelimit = KBps(bdi->dirty_ratelimit);
275 __entry->task_ratelimit = KBps(task_ratelimit);
276 __entry->balanced_dirty_ratelimit =
277 KBps(bdi->balanced_dirty_ratelimit);
278 ),
279
280 TP_printk("bdi %s: "
281 "write_bw=%lu awrite_bw=%lu dirty_rate=%lu "
282 "dirty_ratelimit=%lu task_ratelimit=%lu "
283 "balanced_dirty_ratelimit=%lu",
284 __entry->bdi,
285 __entry->write_bw, /* write bandwidth */
286 __entry->avg_write_bw, /* avg write bandwidth */
287 __entry->dirty_rate, /* bdi dirty rate */
288 __entry->dirty_ratelimit, /* base ratelimit */
289 __entry->task_ratelimit, /* ratelimit with position control */
290 __entry->balanced_dirty_ratelimit /* the balanced ratelimit */
291 )
292);
293
294TRACE_EVENT(balance_dirty_pages,
295
296 TP_PROTO(struct backing_dev_info *bdi,
297 unsigned long thresh,
298 unsigned long bg_thresh,
299 unsigned long dirty,
300 unsigned long bdi_thresh,
301 unsigned long bdi_dirty,
302 unsigned long dirty_ratelimit,
303 unsigned long task_ratelimit,
304 unsigned long dirtied,
305 unsigned long period,
306 long pause,
307 unsigned long start_time),
308
309 TP_ARGS(bdi, thresh, bg_thresh, dirty, bdi_thresh, bdi_dirty,
310 dirty_ratelimit, task_ratelimit,
311 dirtied, period, pause, start_time),
312
313 TP_STRUCT__entry(
314 __array( char, bdi, 32)
315 __field(unsigned long, limit)
316 __field(unsigned long, setpoint)
317 __field(unsigned long, dirty)
318 __field(unsigned long, bdi_setpoint)
319 __field(unsigned long, bdi_dirty)
320 __field(unsigned long, dirty_ratelimit)
321 __field(unsigned long, task_ratelimit)
322 __field(unsigned int, dirtied)
323 __field(unsigned int, dirtied_pause)
324 __field(unsigned long, paused)
325 __field( long, pause)
326 __field(unsigned long, period)
327 __field( long, think)
328 ),
329
330 TP_fast_assign(
331 unsigned long freerun = (thresh + bg_thresh) / 2;
332 strlcpy(__entry->bdi, dev_name(bdi->dev), 32);
333
334 __entry->limit = global_dirty_limit;
335 __entry->setpoint = (global_dirty_limit + freerun) / 2;
336 __entry->dirty = dirty;
337 __entry->bdi_setpoint = __entry->setpoint *
338 bdi_thresh / (thresh + 1);
339 __entry->bdi_dirty = bdi_dirty;
340 __entry->dirty_ratelimit = KBps(dirty_ratelimit);
341 __entry->task_ratelimit = KBps(task_ratelimit);
342 __entry->dirtied = dirtied;
343 __entry->dirtied_pause = current->nr_dirtied_pause;
344 __entry->think = current->dirty_paused_when == 0 ? 0 :
345 (long)(jiffies - current->dirty_paused_when) * 1000/HZ;
346 __entry->period = period * 1000 / HZ;
347 __entry->pause = pause * 1000 / HZ;
348 __entry->paused = (jiffies - start_time) * 1000 / HZ;
349 ),
350
351
352 TP_printk("bdi %s: "
353 "limit=%lu setpoint=%lu dirty=%lu "
354 "bdi_setpoint=%lu bdi_dirty=%lu "
355 "dirty_ratelimit=%lu task_ratelimit=%lu "
356 "dirtied=%u dirtied_pause=%u "
357 "paused=%lu pause=%ld period=%lu think=%ld",
358 __entry->bdi,
359 __entry->limit,
360 __entry->setpoint,
361 __entry->dirty,
362 __entry->bdi_setpoint,
363 __entry->bdi_dirty,
364 __entry->dirty_ratelimit,
365 __entry->task_ratelimit,
366 __entry->dirtied,
367 __entry->dirtied_pause,
368 __entry->paused, /* ms */
369 __entry->pause, /* ms */
370 __entry->period, /* ms */
371 __entry->think /* ms */
372 )
373);
374
375TRACE_EVENT(writeback_sb_inodes_requeue,
376
377 TP_PROTO(struct inode *inode),
378 TP_ARGS(inode),
379
380 TP_STRUCT__entry(
381 __array(char, name, 32)
382 __field(unsigned long, ino)
383 __field(unsigned long, state)
384 __field(unsigned long, dirtied_when)
385 ),
386
387 TP_fast_assign(
388 strncpy(__entry->name,
389 dev_name(inode_to_bdi(inode)->dev), 32);
390 __entry->ino = inode->i_ino;
391 __entry->state = inode->i_state;
392 __entry->dirtied_when = inode->dirtied_when;
393 ),
394
395 TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu",
396 __entry->name,
397 __entry->ino,
398 show_inode_state(__entry->state),
399 __entry->dirtied_when,
400 (jiffies - __entry->dirtied_when) / HZ
401 )
402);
403
404DECLARE_EVENT_CLASS(writeback_congest_waited_template,
405
406 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
407
408 TP_ARGS(usec_timeout, usec_delayed),
409
410 TP_STRUCT__entry(
411 __field( unsigned int, usec_timeout )
412 __field( unsigned int, usec_delayed )
413 ),
414
415 TP_fast_assign(
416 __entry->usec_timeout = usec_timeout;
417 __entry->usec_delayed = usec_delayed;
418 ),
419
420 TP_printk("usec_timeout=%u usec_delayed=%u",
421 __entry->usec_timeout,
422 __entry->usec_delayed)
423);
424
425DEFINE_EVENT(writeback_congest_waited_template, writeback_congestion_wait,
426
427 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
428
429 TP_ARGS(usec_timeout, usec_delayed)
430);
431
432DEFINE_EVENT(writeback_congest_waited_template, writeback_wait_iff_congested,
433
434 TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
435
436 TP_ARGS(usec_timeout, usec_delayed)
437);
438
439DECLARE_EVENT_CLASS(writeback_single_inode_template,
440
441 TP_PROTO(struct inode *inode,
442 struct writeback_control *wbc,
443 unsigned long nr_to_write
444 ),
445
446 TP_ARGS(inode, wbc, nr_to_write),
447
448 TP_STRUCT__entry(
449 __array(char, name, 32)
450 __field(unsigned long, ino)
451 __field(unsigned long, state)
452 __field(unsigned long, dirtied_when)
453 __field(unsigned long, writeback_index)
454 __field(long, nr_to_write)
455 __field(unsigned long, wrote)
456 ),
457
458 TP_fast_assign(
459 strncpy(__entry->name,
460 dev_name(inode_to_bdi(inode)->dev), 32);
461 __entry->ino = inode->i_ino;
462 __entry->state = inode->i_state;
463 __entry->dirtied_when = inode->dirtied_when;
464 __entry->writeback_index = inode->i_mapping->writeback_index;
465 __entry->nr_to_write = nr_to_write;
466 __entry->wrote = nr_to_write - wbc->nr_to_write;
467 ),
468
469 TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu "
470 "index=%lu to_write=%ld wrote=%lu",
471 __entry->name,
472 __entry->ino,
473 show_inode_state(__entry->state),
474 __entry->dirtied_when,
475 (jiffies - __entry->dirtied_when) / HZ,
476 __entry->writeback_index,
477 __entry->nr_to_write,
478 __entry->wrote
479 )
480);
481
482DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode,
483 TP_PROTO(struct inode *inode,
484 struct writeback_control *wbc,
485 unsigned long nr_to_write),
486 TP_ARGS(inode, wbc, nr_to_write)
487);
488
489#endif /* _TRACE_WRITEBACK_H */
490
491/* This part must be outside protection */
492#include <trace/define_trace.h>