Commit | Line | Data |
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64db4cff PM |
1 | /* |
2 | * Read-Copy Update tracing for classic implementation | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | * | |
18 | * Copyright IBM Corporation, 2008 | |
19 | * | |
20 | * Papers: http://www.rdrop.com/users/paulmck/RCU | |
21 | * | |
22 | * For detailed explanation of Read-Copy Update mechanism see - | |
a71fca58 | 23 | * Documentation/RCU |
64db4cff PM |
24 | * |
25 | */ | |
26 | #include <linux/types.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/spinlock.h> | |
30 | #include <linux/smp.h> | |
31 | #include <linux/rcupdate.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/sched.h> | |
60063497 | 34 | #include <linux/atomic.h> |
64db4cff PM |
35 | #include <linux/bitops.h> |
36 | #include <linux/module.h> | |
37 | #include <linux/completion.h> | |
38 | #include <linux/moduleparam.h> | |
39 | #include <linux/percpu.h> | |
40 | #include <linux/notifier.h> | |
41 | #include <linux/cpu.h> | |
42 | #include <linux/mutex.h> | |
43 | #include <linux/debugfs.h> | |
44 | #include <linux/seq_file.h> | |
45 | ||
9f77da9f | 46 | #define RCU_TREE_NONCORE |
6258c4fb IM |
47 | #include "rcutree.h" |
48 | ||
d7e187c8 PM |
49 | static int show_rcubarrier(struct seq_file *m, void *unused) |
50 | { | |
c0cc962d PM |
51 | struct rcu_state *rsp; |
52 | ||
53 | for_each_rcu_flavor(rsp) | |
1331e7a1 PM |
54 | seq_printf(m, "%s: bcc: %d nbd: %lu\n", |
55 | rsp->name, | |
c0cc962d PM |
56 | atomic_read(&rsp->barrier_cpu_count), |
57 | rsp->n_barrier_done); | |
d7e187c8 PM |
58 | return 0; |
59 | } | |
60 | ||
61 | static int rcubarrier_open(struct inode *inode, struct file *file) | |
62 | { | |
63 | return single_open(file, show_rcubarrier, NULL); | |
64 | } | |
65 | ||
66 | static const struct file_operations rcubarrier_fops = { | |
67 | .owner = THIS_MODULE, | |
68 | .open = rcubarrier_open, | |
69 | .read = seq_read, | |
70 | .llseek = seq_lseek, | |
71 | .release = single_release, | |
72 | }; | |
73 | ||
a46e0899 PM |
74 | #ifdef CONFIG_RCU_BOOST |
75 | ||
d71df90e PM |
76 | static char convert_kthread_status(unsigned int kthread_status) |
77 | { | |
78 | if (kthread_status > RCU_KTHREAD_MAX) | |
79 | return '?'; | |
15ba0ba8 | 80 | return "SRWOY"[kthread_status]; |
d71df90e PM |
81 | } |
82 | ||
a46e0899 PM |
83 | #endif /* #ifdef CONFIG_RCU_BOOST */ |
84 | ||
64db4cff PM |
85 | static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp) |
86 | { | |
87 | if (!rdp->beenonline) | |
88 | return; | |
d7d6a11e | 89 | seq_printf(m, "%3d%cc=%lu g=%lu pq=%d qp=%d", |
64db4cff PM |
90 | rdp->cpu, |
91 | cpu_is_offline(rdp->cpu) ? '!' : ' ', | |
92 | rdp->completed, rdp->gpnum, | |
d7d6a11e | 93 | rdp->passed_quiesce, rdp->qs_pending); |
9b2e4f18 | 94 | seq_printf(m, " dt=%d/%llx/%d df=%lu", |
23b5c8fa | 95 | atomic_read(&rdp->dynticks->dynticks), |
64db4cff | 96 | rdp->dynticks->dynticks_nesting, |
23b5c8fa | 97 | rdp->dynticks->dynticks_nmi_nesting, |
64db4cff | 98 | rdp->dynticks_fqs); |
2036d94a | 99 | seq_printf(m, " of=%lu", rdp->offline_fqs); |
486e2593 PM |
100 | seq_printf(m, " ql=%ld/%ld qs=%c%c%c%c", |
101 | rdp->qlen_lazy, rdp->qlen, | |
0ac3d136 PM |
102 | ".N"[rdp->nxttail[RCU_NEXT_READY_TAIL] != |
103 | rdp->nxttail[RCU_NEXT_TAIL]], | |
104 | ".R"[rdp->nxttail[RCU_WAIT_TAIL] != | |
105 | rdp->nxttail[RCU_NEXT_READY_TAIL]], | |
106 | ".W"[rdp->nxttail[RCU_DONE_TAIL] != | |
107 | rdp->nxttail[RCU_WAIT_TAIL]], | |
a46e0899 PM |
108 | ".D"[&rdp->nxtlist != rdp->nxttail[RCU_DONE_TAIL]]); |
109 | #ifdef CONFIG_RCU_BOOST | |
62ab7072 | 110 | seq_printf(m, " kt=%d/%c ktl=%x", |
d71df90e PM |
111 | per_cpu(rcu_cpu_has_work, rdp->cpu), |
112 | convert_kthread_status(per_cpu(rcu_cpu_kthread_status, | |
113 | rdp->cpu)), | |
a46e0899 PM |
114 | per_cpu(rcu_cpu_kthread_loops, rdp->cpu) & 0xffff); |
115 | #endif /* #ifdef CONFIG_RCU_BOOST */ | |
116 | seq_printf(m, " b=%ld", rdp->blimit); | |
269dcc1c PM |
117 | seq_printf(m, " ci=%lu co=%lu ca=%lu\n", |
118 | rdp->n_cbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted); | |
64db4cff PM |
119 | } |
120 | ||
64db4cff PM |
121 | static int show_rcudata(struct seq_file *m, void *unused) |
122 | { | |
c0cc962d PM |
123 | int cpu; |
124 | struct rcu_state *rsp; | |
125 | ||
126 | for_each_rcu_flavor(rsp) { | |
127 | seq_printf(m, "%s:\n", rsp->name); | |
128 | for_each_possible_cpu(cpu) | |
129 | print_one_rcu_data(m, per_cpu_ptr(rsp->rda, cpu)); | |
130 | } | |
64db4cff PM |
131 | return 0; |
132 | } | |
133 | ||
134 | static int rcudata_open(struct inode *inode, struct file *file) | |
135 | { | |
136 | return single_open(file, show_rcudata, NULL); | |
137 | } | |
138 | ||
9b2619af | 139 | static const struct file_operations rcudata_fops = { |
64db4cff PM |
140 | .owner = THIS_MODULE, |
141 | .open = rcudata_open, | |
142 | .read = seq_read, | |
143 | .llseek = seq_lseek, | |
144 | .release = single_release, | |
145 | }; | |
146 | ||
147 | static void print_one_rcu_data_csv(struct seq_file *m, struct rcu_data *rdp) | |
148 | { | |
149 | if (!rdp->beenonline) | |
150 | return; | |
d7d6a11e | 151 | seq_printf(m, "%d,%s,%lu,%lu,%d,%d", |
64db4cff | 152 | rdp->cpu, |
5699ed8f | 153 | cpu_is_offline(rdp->cpu) ? "\"N\"" : "\"Y\"", |
64db4cff | 154 | rdp->completed, rdp->gpnum, |
d7d6a11e | 155 | rdp->passed_quiesce, rdp->qs_pending); |
9b2e4f18 | 156 | seq_printf(m, ",%d,%llx,%d,%lu", |
23b5c8fa | 157 | atomic_read(&rdp->dynticks->dynticks), |
64db4cff | 158 | rdp->dynticks->dynticks_nesting, |
23b5c8fa | 159 | rdp->dynticks->dynticks_nmi_nesting, |
64db4cff | 160 | rdp->dynticks_fqs); |
2036d94a | 161 | seq_printf(m, ",%lu", rdp->offline_fqs); |
486e2593 | 162 | seq_printf(m, ",%ld,%ld,\"%c%c%c%c\"", rdp->qlen_lazy, rdp->qlen, |
0ac3d136 PM |
163 | ".N"[rdp->nxttail[RCU_NEXT_READY_TAIL] != |
164 | rdp->nxttail[RCU_NEXT_TAIL]], | |
165 | ".R"[rdp->nxttail[RCU_WAIT_TAIL] != | |
166 | rdp->nxttail[RCU_NEXT_READY_TAIL]], | |
167 | ".W"[rdp->nxttail[RCU_DONE_TAIL] != | |
168 | rdp->nxttail[RCU_WAIT_TAIL]], | |
a46e0899 PM |
169 | ".D"[&rdp->nxtlist != rdp->nxttail[RCU_DONE_TAIL]]); |
170 | #ifdef CONFIG_RCU_BOOST | |
171 | seq_printf(m, ",%d,\"%c\"", | |
d71df90e PM |
172 | per_cpu(rcu_cpu_has_work, rdp->cpu), |
173 | convert_kthread_status(per_cpu(rcu_cpu_kthread_status, | |
a46e0899 PM |
174 | rdp->cpu))); |
175 | #endif /* #ifdef CONFIG_RCU_BOOST */ | |
176 | seq_printf(m, ",%ld", rdp->blimit); | |
269dcc1c PM |
177 | seq_printf(m, ",%lu,%lu,%lu\n", |
178 | rdp->n_cbs_invoked, rdp->n_cbs_orphaned, rdp->n_cbs_adopted); | |
64db4cff PM |
179 | } |
180 | ||
181 | static int show_rcudata_csv(struct seq_file *m, void *unused) | |
182 | { | |
c0cc962d PM |
183 | int cpu; |
184 | struct rcu_state *rsp; | |
185 | ||
d7d6a11e | 186 | seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pq\","); |
23b5c8fa | 187 | seq_puts(m, "\"dt\",\"dt nesting\",\"dt NMI nesting\",\"df\","); |
2036d94a | 188 | seq_puts(m, "\"of\",\"qll\",\"ql\",\"qs\""); |
a46e0899 PM |
189 | #ifdef CONFIG_RCU_BOOST |
190 | seq_puts(m, "\"kt\",\"ktl\""); | |
191 | #endif /* #ifdef CONFIG_RCU_BOOST */ | |
192 | seq_puts(m, ",\"b\",\"ci\",\"co\",\"ca\"\n"); | |
c0cc962d PM |
193 | for_each_rcu_flavor(rsp) { |
194 | seq_printf(m, "\"%s:\"\n", rsp->name); | |
195 | for_each_possible_cpu(cpu) | |
196 | print_one_rcu_data_csv(m, per_cpu_ptr(rsp->rda, cpu)); | |
197 | } | |
64db4cff PM |
198 | return 0; |
199 | } | |
200 | ||
201 | static int rcudata_csv_open(struct inode *inode, struct file *file) | |
202 | { | |
203 | return single_open(file, show_rcudata_csv, NULL); | |
204 | } | |
205 | ||
9b2619af | 206 | static const struct file_operations rcudata_csv_fops = { |
64db4cff PM |
207 | .owner = THIS_MODULE, |
208 | .open = rcudata_csv_open, | |
209 | .read = seq_read, | |
210 | .llseek = seq_lseek, | |
211 | .release = single_release, | |
212 | }; | |
213 | ||
0ea1f2eb PM |
214 | #ifdef CONFIG_RCU_BOOST |
215 | ||
216 | static void print_one_rcu_node_boost(struct seq_file *m, struct rcu_node *rnp) | |
217 | { | |
5cf05ad7 | 218 | seq_printf(m, "%d:%d tasks=%c%c%c%c kt=%c ntb=%lu neb=%lu nnb=%lu ", |
0ea1f2eb PM |
219 | rnp->grplo, rnp->grphi, |
220 | "T."[list_empty(&rnp->blkd_tasks)], | |
221 | "N."[!rnp->gp_tasks], | |
222 | "E."[!rnp->exp_tasks], | |
223 | "B."[!rnp->boost_tasks], | |
d71df90e | 224 | convert_kthread_status(rnp->boost_kthread_status), |
0ea1f2eb | 225 | rnp->n_tasks_boosted, rnp->n_exp_boosts, |
5cf05ad7 PM |
226 | rnp->n_normal_boosts); |
227 | seq_printf(m, "j=%04x bt=%04x\n", | |
0ea1f2eb PM |
228 | (int)(jiffies & 0xffff), |
229 | (int)(rnp->boost_time & 0xffff)); | |
5cf05ad7 | 230 | seq_printf(m, " balk: nt=%lu egt=%lu bt=%lu nb=%lu ny=%lu nos=%lu\n", |
0ea1f2eb PM |
231 | rnp->n_balk_blkd_tasks, |
232 | rnp->n_balk_exp_gp_tasks, | |
233 | rnp->n_balk_boost_tasks, | |
234 | rnp->n_balk_notblocked, | |
235 | rnp->n_balk_notyet, | |
236 | rnp->n_balk_nos); | |
237 | } | |
238 | ||
239 | static int show_rcu_node_boost(struct seq_file *m, void *unused) | |
240 | { | |
241 | struct rcu_node *rnp; | |
242 | ||
243 | rcu_for_each_leaf_node(&rcu_preempt_state, rnp) | |
244 | print_one_rcu_node_boost(m, rnp); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static int rcu_node_boost_open(struct inode *inode, struct file *file) | |
249 | { | |
250 | return single_open(file, show_rcu_node_boost, NULL); | |
251 | } | |
252 | ||
253 | static const struct file_operations rcu_node_boost_fops = { | |
254 | .owner = THIS_MODULE, | |
255 | .open = rcu_node_boost_open, | |
256 | .read = seq_read, | |
257 | .llseek = seq_lseek, | |
258 | .release = single_release, | |
259 | }; | |
260 | ||
261 | /* | |
262 | * Create the rcuboost debugfs entry. Standard error return. | |
263 | */ | |
264 | static int rcu_boost_trace_create_file(struct dentry *rcudir) | |
265 | { | |
266 | return !debugfs_create_file("rcuboost", 0444, rcudir, NULL, | |
267 | &rcu_node_boost_fops); | |
268 | } | |
269 | ||
270 | #else /* #ifdef CONFIG_RCU_BOOST */ | |
271 | ||
272 | static int rcu_boost_trace_create_file(struct dentry *rcudir) | |
273 | { | |
274 | return 0; /* There cannot be an error if we didn't create it! */ | |
275 | } | |
276 | ||
277 | #endif /* #else #ifdef CONFIG_RCU_BOOST */ | |
278 | ||
64db4cff PM |
279 | static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp) |
280 | { | |
20133cfc | 281 | unsigned long gpnum; |
64db4cff PM |
282 | int level = 0; |
283 | struct rcu_node *rnp; | |
284 | ||
3397e040 | 285 | gpnum = rsp->gpnum; |
5cf05ad7 | 286 | seq_printf(m, "%s: c=%lu g=%lu s=%d jfq=%ld j=%x ", |
c0cc962d | 287 | rsp->name, rsp->completed, gpnum, rsp->fqs_state, |
64db4cff | 288 | (long)(rsp->jiffies_force_qs - jiffies), |
5cf05ad7 PM |
289 | (int)(jiffies & 0xffff)); |
290 | seq_printf(m, "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu oqlen=%ld/%ld\n", | |
64db4cff PM |
291 | rsp->n_force_qs, rsp->n_force_qs_ngp, |
292 | rsp->n_force_qs - rsp->n_force_qs_ngp, | |
b1420f1c | 293 | rsp->n_force_qs_lh, rsp->qlen_lazy, rsp->qlen); |
f885b7f2 | 294 | for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < rcu_num_nodes; rnp++) { |
64db4cff PM |
295 | if (rnp->level != level) { |
296 | seq_puts(m, "\n"); | |
297 | level = rnp->level; | |
298 | } | |
12f5f524 | 299 | seq_printf(m, "%lx/%lx %c%c>%c %d:%d ^%d ", |
64db4cff | 300 | rnp->qsmask, rnp->qsmaskinit, |
12f5f524 PM |
301 | ".G"[rnp->gp_tasks != NULL], |
302 | ".E"[rnp->exp_tasks != NULL], | |
303 | ".T"[!list_empty(&rnp->blkd_tasks)], | |
64db4cff PM |
304 | rnp->grplo, rnp->grphi, rnp->grpnum); |
305 | } | |
306 | seq_puts(m, "\n"); | |
307 | } | |
308 | ||
309 | static int show_rcuhier(struct seq_file *m, void *unused) | |
310 | { | |
c0cc962d PM |
311 | struct rcu_state *rsp; |
312 | ||
313 | for_each_rcu_flavor(rsp) | |
314 | print_one_rcu_state(m, rsp); | |
64db4cff PM |
315 | return 0; |
316 | } | |
317 | ||
318 | static int rcuhier_open(struct inode *inode, struct file *file) | |
319 | { | |
320 | return single_open(file, show_rcuhier, NULL); | |
321 | } | |
322 | ||
9b2619af | 323 | static const struct file_operations rcuhier_fops = { |
64db4cff PM |
324 | .owner = THIS_MODULE, |
325 | .open = rcuhier_open, | |
326 | .read = seq_read, | |
327 | .llseek = seq_lseek, | |
328 | .release = single_release, | |
329 | }; | |
330 | ||
15ba0ba8 PM |
331 | static void show_one_rcugp(struct seq_file *m, struct rcu_state *rsp) |
332 | { | |
333 | unsigned long flags; | |
334 | unsigned long completed; | |
335 | unsigned long gpnum; | |
336 | unsigned long gpage; | |
337 | unsigned long gpmax; | |
338 | struct rcu_node *rnp = &rsp->node[0]; | |
339 | ||
340 | raw_spin_lock_irqsave(&rnp->lock, flags); | |
341 | completed = rsp->completed; | |
342 | gpnum = rsp->gpnum; | |
343 | if (rsp->completed == rsp->gpnum) | |
344 | gpage = 0; | |
345 | else | |
346 | gpage = jiffies - rsp->gp_start; | |
347 | gpmax = rsp->gp_max; | |
348 | raw_spin_unlock_irqrestore(&rnp->lock, flags); | |
349 | seq_printf(m, "%s: completed=%ld gpnum=%lu age=%ld max=%ld\n", | |
350 | rsp->name, completed, gpnum, gpage, gpmax); | |
351 | } | |
352 | ||
64db4cff PM |
353 | static int show_rcugp(struct seq_file *m, void *unused) |
354 | { | |
c0cc962d PM |
355 | struct rcu_state *rsp; |
356 | ||
357 | for_each_rcu_flavor(rsp) | |
358 | show_one_rcugp(m, rsp); | |
64db4cff PM |
359 | return 0; |
360 | } | |
361 | ||
362 | static int rcugp_open(struct inode *inode, struct file *file) | |
363 | { | |
364 | return single_open(file, show_rcugp, NULL); | |
365 | } | |
366 | ||
9b2619af | 367 | static const struct file_operations rcugp_fops = { |
64db4cff PM |
368 | .owner = THIS_MODULE, |
369 | .open = rcugp_open, | |
370 | .read = seq_read, | |
371 | .llseek = seq_lseek, | |
372 | .release = single_release, | |
373 | }; | |
374 | ||
7ba5c840 PM |
375 | static void print_one_rcu_pending(struct seq_file *m, struct rcu_data *rdp) |
376 | { | |
5cf05ad7 | 377 | seq_printf(m, "%3d%cnp=%ld ", |
7ba5c840 PM |
378 | rdp->cpu, |
379 | cpu_is_offline(rdp->cpu) ? '!' : ' ', | |
5cf05ad7 PM |
380 | rdp->n_rcu_pending); |
381 | seq_printf(m, "qsp=%ld rpq=%ld cbr=%ld cng=%ld ", | |
7ba5c840 | 382 | rdp->n_rp_qs_pending, |
d21670ac | 383 | rdp->n_rp_report_qs, |
7ba5c840 | 384 | rdp->n_rp_cb_ready, |
5cf05ad7 | 385 | rdp->n_rp_cpu_needs_gp); |
4605c014 | 386 | seq_printf(m, "gpc=%ld gps=%ld nn=%ld\n", |
7ba5c840 PM |
387 | rdp->n_rp_gp_completed, |
388 | rdp->n_rp_gp_started, | |
7ba5c840 PM |
389 | rdp->n_rp_need_nothing); |
390 | } | |
391 | ||
c0cc962d | 392 | static int show_rcu_pending(struct seq_file *m, void *unused) |
7ba5c840 PM |
393 | { |
394 | int cpu; | |
395 | struct rcu_data *rdp; | |
c0cc962d PM |
396 | struct rcu_state *rsp; |
397 | ||
398 | for_each_rcu_flavor(rsp) { | |
399 | seq_printf(m, "%s:\n", rsp->name); | |
400 | for_each_possible_cpu(cpu) { | |
401 | rdp = per_cpu_ptr(rsp->rda, cpu); | |
402 | if (rdp->beenonline) | |
403 | print_one_rcu_pending(m, rdp); | |
404 | } | |
7ba5c840 | 405 | } |
7ba5c840 PM |
406 | return 0; |
407 | } | |
408 | ||
409 | static int rcu_pending_open(struct inode *inode, struct file *file) | |
410 | { | |
411 | return single_open(file, show_rcu_pending, NULL); | |
412 | } | |
413 | ||
9b2619af | 414 | static const struct file_operations rcu_pending_fops = { |
7ba5c840 PM |
415 | .owner = THIS_MODULE, |
416 | .open = rcu_pending_open, | |
417 | .read = seq_read, | |
418 | .llseek = seq_lseek, | |
419 | .release = single_release, | |
420 | }; | |
421 | ||
4a298656 PM |
422 | static int show_rcutorture(struct seq_file *m, void *unused) |
423 | { | |
424 | seq_printf(m, "rcutorture test sequence: %lu %s\n", | |
425 | rcutorture_testseq >> 1, | |
426 | (rcutorture_testseq & 0x1) ? "(test in progress)" : ""); | |
427 | seq_printf(m, "rcutorture update version number: %lu\n", | |
428 | rcutorture_vernum); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | static int rcutorture_open(struct inode *inode, struct file *file) | |
433 | { | |
434 | return single_open(file, show_rcutorture, NULL); | |
435 | } | |
436 | ||
437 | static const struct file_operations rcutorture_fops = { | |
438 | .owner = THIS_MODULE, | |
439 | .open = rcutorture_open, | |
440 | .read = seq_read, | |
441 | .llseek = seq_lseek, | |
442 | .release = single_release, | |
443 | }; | |
444 | ||
7ba5c840 | 445 | static struct dentry *rcudir; |
7ba5c840 | 446 | |
deb7a418 | 447 | static int __init rcutree_trace_init(void) |
64db4cff | 448 | { |
22f00b69 PM |
449 | struct dentry *retval; |
450 | ||
64db4cff PM |
451 | rcudir = debugfs_create_dir("rcu", NULL); |
452 | if (!rcudir) | |
22f00b69 | 453 | goto free_out; |
64db4cff | 454 | |
d7e187c8 PM |
455 | retval = debugfs_create_file("rcubarrier", 0444, rcudir, |
456 | NULL, &rcubarrier_fops); | |
457 | if (!retval) | |
458 | goto free_out; | |
459 | ||
22f00b69 | 460 | retval = debugfs_create_file("rcudata", 0444, rcudir, |
64db4cff | 461 | NULL, &rcudata_fops); |
22f00b69 | 462 | if (!retval) |
64db4cff PM |
463 | goto free_out; |
464 | ||
22f00b69 | 465 | retval = debugfs_create_file("rcudata.csv", 0444, rcudir, |
64db4cff | 466 | NULL, &rcudata_csv_fops); |
22f00b69 | 467 | if (!retval) |
64db4cff PM |
468 | goto free_out; |
469 | ||
0ea1f2eb PM |
470 | if (rcu_boost_trace_create_file(rcudir)) |
471 | goto free_out; | |
472 | ||
22f00b69 PM |
473 | retval = debugfs_create_file("rcugp", 0444, rcudir, NULL, &rcugp_fops); |
474 | if (!retval) | |
64db4cff PM |
475 | goto free_out; |
476 | ||
22f00b69 | 477 | retval = debugfs_create_file("rcuhier", 0444, rcudir, |
64db4cff | 478 | NULL, &rcuhier_fops); |
22f00b69 | 479 | if (!retval) |
64db4cff | 480 | goto free_out; |
7ba5c840 | 481 | |
22f00b69 | 482 | retval = debugfs_create_file("rcu_pending", 0444, rcudir, |
7ba5c840 | 483 | NULL, &rcu_pending_fops); |
22f00b69 | 484 | if (!retval) |
7ba5c840 | 485 | goto free_out; |
4a298656 PM |
486 | |
487 | retval = debugfs_create_file("rcutorture", 0444, rcudir, | |
488 | NULL, &rcutorture_fops); | |
489 | if (!retval) | |
490 | goto free_out; | |
64db4cff PM |
491 | return 0; |
492 | free_out: | |
22f00b69 | 493 | debugfs_remove_recursive(rcudir); |
64db4cff PM |
494 | return 1; |
495 | } | |
496 | ||
deb7a418 | 497 | static void __exit rcutree_trace_cleanup(void) |
64db4cff | 498 | { |
22f00b69 | 499 | debugfs_remove_recursive(rcudir); |
64db4cff PM |
500 | } |
501 | ||
502 | ||
deb7a418 PM |
503 | module_init(rcutree_trace_init); |
504 | module_exit(rcutree_trace_cleanup); | |
64db4cff PM |
505 | |
506 | MODULE_AUTHOR("Paul E. McKenney"); | |
507 | MODULE_DESCRIPTION("Read-Copy Update tracing for hierarchical implementation"); | |
508 | MODULE_LICENSE("GPL"); |