Commit | Line | Data |
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470decc6 | 1 | /* |
f7f4bccb | 2 | * linux/fs/jbd2/commit.c |
470decc6 DK |
3 | * |
4 | * Written by Stephen C. Tweedie <sct@redhat.com>, 1998 | |
5 | * | |
6 | * Copyright 1998 Red Hat corp --- All Rights Reserved | |
7 | * | |
8 | * This file is part of the Linux kernel and is made available under | |
9 | * the terms of the GNU General Public License, version 2, or at your | |
10 | * option, any later version, incorporated herein by reference. | |
11 | * | |
12 | * Journal commit routines for the generic filesystem journaling code; | |
13 | * part of the ext2fs journaling system. | |
14 | */ | |
15 | ||
16 | #include <linux/time.h> | |
17 | #include <linux/fs.h> | |
f7f4bccb | 18 | #include <linux/jbd2.h> |
ede86cc4 | 19 | #include <linux/marker.h> |
470decc6 DK |
20 | #include <linux/errno.h> |
21 | #include <linux/slab.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/pagemap.h> | |
8e85fb3f | 24 | #include <linux/jiffies.h> |
818d276c | 25 | #include <linux/crc32.h> |
cd1aac32 AK |
26 | #include <linux/writeback.h> |
27 | #include <linux/backing-dev.h> | |
470decc6 DK |
28 | |
29 | /* | |
30 | * Default IO end handler for temporary BJ_IO buffer_heads. | |
31 | */ | |
32 | static void journal_end_buffer_io_sync(struct buffer_head *bh, int uptodate) | |
33 | { | |
34 | BUFFER_TRACE(bh, ""); | |
35 | if (uptodate) | |
36 | set_buffer_uptodate(bh); | |
37 | else | |
38 | clear_buffer_uptodate(bh); | |
39 | unlock_buffer(bh); | |
40 | } | |
41 | ||
42 | /* | |
87c89c23 JK |
43 | * When an ext4 file is truncated, it is possible that some pages are not |
44 | * successfully freed, because they are attached to a committing transaction. | |
470decc6 DK |
45 | * After the transaction commits, these pages are left on the LRU, with no |
46 | * ->mapping, and with attached buffers. These pages are trivially reclaimable | |
47 | * by the VM, but their apparent absence upsets the VM accounting, and it makes | |
48 | * the numbers in /proc/meminfo look odd. | |
49 | * | |
50 | * So here, we have a buffer which has just come off the forget list. Look to | |
51 | * see if we can strip all buffers from the backing page. | |
52 | * | |
53 | * Called under lock_journal(), and possibly under journal_datalist_lock. The | |
54 | * caller provided us with a ref against the buffer, and we drop that here. | |
55 | */ | |
56 | static void release_buffer_page(struct buffer_head *bh) | |
57 | { | |
58 | struct page *page; | |
59 | ||
60 | if (buffer_dirty(bh)) | |
61 | goto nope; | |
62 | if (atomic_read(&bh->b_count) != 1) | |
63 | goto nope; | |
64 | page = bh->b_page; | |
65 | if (!page) | |
66 | goto nope; | |
67 | if (page->mapping) | |
68 | goto nope; | |
69 | ||
70 | /* OK, it's a truncated page */ | |
529ae9aa | 71 | if (!trylock_page(page)) |
470decc6 DK |
72 | goto nope; |
73 | ||
74 | page_cache_get(page); | |
75 | __brelse(bh); | |
76 | try_to_free_buffers(page); | |
77 | unlock_page(page); | |
78 | page_cache_release(page); | |
79 | return; | |
80 | ||
81 | nope: | |
82 | __brelse(bh); | |
83 | } | |
84 | ||
818d276c GS |
85 | /* |
86 | * Done it all: now submit the commit record. We should have | |
470decc6 DK |
87 | * cleaned up our previous buffers by now, so if we are in abort |
88 | * mode we can now just skip the rest of the journal write | |
89 | * entirely. | |
90 | * | |
91 | * Returns 1 if the journal needs to be aborted or 0 on success | |
92 | */ | |
818d276c GS |
93 | static int journal_submit_commit_record(journal_t *journal, |
94 | transaction_t *commit_transaction, | |
95 | struct buffer_head **cbh, | |
96 | __u32 crc32_sum) | |
470decc6 DK |
97 | { |
98 | struct journal_head *descriptor; | |
818d276c | 99 | struct commit_header *tmp; |
470decc6 | 100 | struct buffer_head *bh; |
818d276c | 101 | int ret; |
470decc6 | 102 | int barrier_done = 0; |
736603ab | 103 | struct timespec now = current_kernel_time(); |
470decc6 DK |
104 | |
105 | if (is_journal_aborted(journal)) | |
106 | return 0; | |
107 | ||
f7f4bccb | 108 | descriptor = jbd2_journal_get_descriptor_buffer(journal); |
470decc6 DK |
109 | if (!descriptor) |
110 | return 1; | |
111 | ||
112 | bh = jh2bh(descriptor); | |
113 | ||
818d276c GS |
114 | tmp = (struct commit_header *)bh->b_data; |
115 | tmp->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); | |
116 | tmp->h_blocktype = cpu_to_be32(JBD2_COMMIT_BLOCK); | |
117 | tmp->h_sequence = cpu_to_be32(commit_transaction->t_tid); | |
736603ab TT |
118 | tmp->h_commit_sec = cpu_to_be64(now.tv_sec); |
119 | tmp->h_commit_nsec = cpu_to_be32(now.tv_nsec); | |
818d276c GS |
120 | |
121 | if (JBD2_HAS_COMPAT_FEATURE(journal, | |
122 | JBD2_FEATURE_COMPAT_CHECKSUM)) { | |
123 | tmp->h_chksum_type = JBD2_CRC32_CHKSUM; | |
124 | tmp->h_chksum_size = JBD2_CRC32_CHKSUM_SIZE; | |
125 | tmp->h_chksum[0] = cpu_to_be32(crc32_sum); | |
470decc6 DK |
126 | } |
127 | ||
818d276c GS |
128 | JBUFFER_TRACE(descriptor, "submit commit block"); |
129 | lock_buffer(bh); | |
45a90bfd | 130 | clear_buffer_dirty(bh); |
818d276c GS |
131 | set_buffer_uptodate(bh); |
132 | bh->b_end_io = journal_end_buffer_io_sync; | |
133 | ||
134 | if (journal->j_flags & JBD2_BARRIER && | |
4d605179 | 135 | !JBD2_HAS_INCOMPAT_FEATURE(journal, |
818d276c | 136 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { |
470decc6 DK |
137 | set_buffer_ordered(bh); |
138 | barrier_done = 1; | |
139 | } | |
818d276c | 140 | ret = submit_bh(WRITE, bh); |
c4e35e07 DK |
141 | if (barrier_done) |
142 | clear_buffer_ordered(bh); | |
818d276c | 143 | |
470decc6 DK |
144 | /* is it possible for another commit to fail at roughly |
145 | * the same time as this one? If so, we don't want to | |
146 | * trust the barrier flag in the super, but instead want | |
147 | * to remember if we sent a barrier request | |
148 | */ | |
149 | if (ret == -EOPNOTSUPP && barrier_done) { | |
470decc6 | 150 | printk(KERN_WARNING |
05496769 TT |
151 | "JBD: barrier-based sync failed on %s - " |
152 | "disabling barriers\n", journal->j_devname); | |
470decc6 | 153 | spin_lock(&journal->j_state_lock); |
f7f4bccb | 154 | journal->j_flags &= ~JBD2_BARRIER; |
470decc6 DK |
155 | spin_unlock(&journal->j_state_lock); |
156 | ||
157 | /* And try again, without the barrier */ | |
034772b0 | 158 | lock_buffer(bh); |
470decc6 | 159 | set_buffer_uptodate(bh); |
45a90bfd | 160 | clear_buffer_dirty(bh); |
818d276c | 161 | ret = submit_bh(WRITE, bh); |
470decc6 | 162 | } |
818d276c GS |
163 | *cbh = bh; |
164 | return ret; | |
165 | } | |
166 | ||
167 | /* | |
168 | * This function along with journal_submit_commit_record | |
169 | * allows to write the commit record asynchronously. | |
170 | */ | |
171 | static int journal_wait_on_commit_record(struct buffer_head *bh) | |
172 | { | |
173 | int ret = 0; | |
174 | ||
175 | clear_buffer_dirty(bh); | |
176 | wait_on_buffer(bh); | |
470decc6 | 177 | |
818d276c GS |
178 | if (unlikely(!buffer_uptodate(bh))) |
179 | ret = -EIO; | |
180 | put_bh(bh); /* One for getblk() */ | |
181 | jbd2_journal_put_journal_head(bh2jh(bh)); | |
182 | ||
183 | return ret; | |
470decc6 DK |
184 | } |
185 | ||
cd1aac32 AK |
186 | /* |
187 | * write the filemap data using writepage() address_space_operations. | |
188 | * We don't do block allocation here even for delalloc. We don't | |
189 | * use writepages() because with dealyed allocation we may be doing | |
190 | * block allocation in writepages(). | |
191 | */ | |
192 | static int journal_submit_inode_data_buffers(struct address_space *mapping) | |
193 | { | |
194 | int ret; | |
195 | struct writeback_control wbc = { | |
196 | .sync_mode = WB_SYNC_ALL, | |
197 | .nr_to_write = mapping->nrpages * 2, | |
198 | .range_start = 0, | |
199 | .range_end = i_size_read(mapping->host), | |
200 | .for_writepages = 1, | |
201 | }; | |
202 | ||
203 | ret = generic_writepages(mapping, &wbc); | |
204 | return ret; | |
205 | } | |
206 | ||
c851ed54 JK |
207 | /* |
208 | * Submit all the data buffers of inode associated with the transaction to | |
209 | * disk. | |
210 | * | |
211 | * We are in a committing transaction. Therefore no new inode can be added to | |
212 | * our inode list. We use JI_COMMIT_RUNNING flag to protect inode we currently | |
213 | * operate on from being released while we write out pages. | |
214 | */ | |
cd1aac32 | 215 | static int journal_submit_data_buffers(journal_t *journal, |
c851ed54 JK |
216 | transaction_t *commit_transaction) |
217 | { | |
218 | struct jbd2_inode *jinode; | |
219 | int err, ret = 0; | |
220 | struct address_space *mapping; | |
221 | ||
222 | spin_lock(&journal->j_list_lock); | |
223 | list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) { | |
224 | mapping = jinode->i_vfs_inode->i_mapping; | |
225 | jinode->i_flags |= JI_COMMIT_RUNNING; | |
226 | spin_unlock(&journal->j_list_lock); | |
cd1aac32 AK |
227 | /* |
228 | * submit the inode data buffers. We use writepage | |
229 | * instead of writepages. Because writepages can do | |
230 | * block allocation with delalloc. We need to write | |
231 | * only allocated blocks here. | |
232 | */ | |
233 | err = journal_submit_inode_data_buffers(mapping); | |
c851ed54 JK |
234 | if (!ret) |
235 | ret = err; | |
236 | spin_lock(&journal->j_list_lock); | |
237 | J_ASSERT(jinode->i_transaction == commit_transaction); | |
238 | jinode->i_flags &= ~JI_COMMIT_RUNNING; | |
239 | wake_up_bit(&jinode->i_flags, __JI_COMMIT_RUNNING); | |
240 | } | |
241 | spin_unlock(&journal->j_list_lock); | |
242 | return ret; | |
243 | } | |
244 | ||
245 | /* | |
246 | * Wait for data submitted for writeout, refile inodes to proper | |
247 | * transaction if needed. | |
248 | * | |
249 | */ | |
250 | static int journal_finish_inode_data_buffers(journal_t *journal, | |
251 | transaction_t *commit_transaction) | |
252 | { | |
253 | struct jbd2_inode *jinode, *next_i; | |
254 | int err, ret = 0; | |
255 | ||
cd1aac32 | 256 | /* For locking, see the comment in journal_submit_data_buffers() */ |
c851ed54 JK |
257 | spin_lock(&journal->j_list_lock); |
258 | list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) { | |
259 | jinode->i_flags |= JI_COMMIT_RUNNING; | |
260 | spin_unlock(&journal->j_list_lock); | |
261 | err = filemap_fdatawait(jinode->i_vfs_inode->i_mapping); | |
e9e34f4e HK |
262 | if (err) { |
263 | /* | |
264 | * Because AS_EIO is cleared by | |
265 | * wait_on_page_writeback_range(), set it again so | |
266 | * that user process can get -EIO from fsync(). | |
267 | */ | |
268 | set_bit(AS_EIO, | |
269 | &jinode->i_vfs_inode->i_mapping->flags); | |
270 | ||
271 | if (!ret) | |
272 | ret = err; | |
273 | } | |
c851ed54 JK |
274 | spin_lock(&journal->j_list_lock); |
275 | jinode->i_flags &= ~JI_COMMIT_RUNNING; | |
276 | wake_up_bit(&jinode->i_flags, __JI_COMMIT_RUNNING); | |
277 | } | |
278 | ||
279 | /* Now refile inode to proper lists */ | |
280 | list_for_each_entry_safe(jinode, next_i, | |
281 | &commit_transaction->t_inode_list, i_list) { | |
282 | list_del(&jinode->i_list); | |
283 | if (jinode->i_next_transaction) { | |
284 | jinode->i_transaction = jinode->i_next_transaction; | |
285 | jinode->i_next_transaction = NULL; | |
286 | list_add(&jinode->i_list, | |
287 | &jinode->i_transaction->t_inode_list); | |
288 | } else { | |
289 | jinode->i_transaction = NULL; | |
290 | } | |
291 | } | |
292 | spin_unlock(&journal->j_list_lock); | |
293 | ||
294 | return ret; | |
295 | } | |
296 | ||
818d276c GS |
297 | static __u32 jbd2_checksum_data(__u32 crc32_sum, struct buffer_head *bh) |
298 | { | |
299 | struct page *page = bh->b_page; | |
300 | char *addr; | |
301 | __u32 checksum; | |
302 | ||
303 | addr = kmap_atomic(page, KM_USER0); | |
304 | checksum = crc32_be(crc32_sum, | |
305 | (void *)(addr + offset_in_page(bh->b_data)), bh->b_size); | |
306 | kunmap_atomic(addr, KM_USER0); | |
307 | ||
308 | return checksum; | |
309 | } | |
310 | ||
311 | static void write_tag_block(int tag_bytes, journal_block_tag_t *tag, | |
18eba7aa | 312 | unsigned long long block) |
b517bea1 ZB |
313 | { |
314 | tag->t_blocknr = cpu_to_be32(block & (u32)~0); | |
cd02ff0b | 315 | if (tag_bytes > JBD2_TAG_SIZE32) |
b517bea1 ZB |
316 | tag->t_blocknr_high = cpu_to_be32((block >> 31) >> 1); |
317 | } | |
318 | ||
470decc6 | 319 | /* |
f7f4bccb | 320 | * jbd2_journal_commit_transaction |
470decc6 DK |
321 | * |
322 | * The primary function for committing a transaction to the log. This | |
323 | * function is called by the journal thread to begin a complete commit. | |
324 | */ | |
f7f4bccb | 325 | void jbd2_journal_commit_transaction(journal_t *journal) |
470decc6 | 326 | { |
8e85fb3f | 327 | struct transaction_stats_s stats; |
470decc6 DK |
328 | transaction_t *commit_transaction; |
329 | struct journal_head *jh, *new_jh, *descriptor; | |
330 | struct buffer_head **wbuf = journal->j_wbuf; | |
331 | int bufs; | |
332 | int flags; | |
333 | int err; | |
18eba7aa | 334 | unsigned long long blocknr; |
470decc6 DK |
335 | char *tagp = NULL; |
336 | journal_header_t *header; | |
337 | journal_block_tag_t *tag = NULL; | |
338 | int space_left = 0; | |
339 | int first_tag = 0; | |
340 | int tag_flag; | |
341 | int i; | |
b517bea1 | 342 | int tag_bytes = journal_tag_bytes(journal); |
818d276c GS |
343 | struct buffer_head *cbh = NULL; /* For transactional checksums */ |
344 | __u32 crc32_sum = ~0; | |
470decc6 DK |
345 | |
346 | /* | |
347 | * First job: lock down the current transaction and wait for | |
348 | * all outstanding updates to complete. | |
349 | */ | |
350 | ||
351 | #ifdef COMMIT_STATS | |
352 | spin_lock(&journal->j_list_lock); | |
353 | summarise_journal_usage(journal); | |
354 | spin_unlock(&journal->j_list_lock); | |
355 | #endif | |
356 | ||
f7f4bccb MC |
357 | /* Do we need to erase the effects of a prior jbd2_journal_flush? */ |
358 | if (journal->j_flags & JBD2_FLUSHED) { | |
470decc6 | 359 | jbd_debug(3, "super block updated\n"); |
f7f4bccb | 360 | jbd2_journal_update_superblock(journal, 1); |
470decc6 DK |
361 | } else { |
362 | jbd_debug(3, "superblock not updated\n"); | |
363 | } | |
364 | ||
365 | J_ASSERT(journal->j_running_transaction != NULL); | |
366 | J_ASSERT(journal->j_committing_transaction == NULL); | |
367 | ||
368 | commit_transaction = journal->j_running_transaction; | |
369 | J_ASSERT(commit_transaction->t_state == T_RUNNING); | |
370 | ||
ede86cc4 TT |
371 | trace_mark(jbd2_start_commit, "dev %s transaction %d", |
372 | journal->j_devname, commit_transaction->t_tid); | |
470decc6 DK |
373 | jbd_debug(1, "JBD: starting commit of transaction %d\n", |
374 | commit_transaction->t_tid); | |
375 | ||
376 | spin_lock(&journal->j_state_lock); | |
377 | commit_transaction->t_state = T_LOCKED; | |
378 | ||
8e85fb3f JL |
379 | stats.u.run.rs_wait = commit_transaction->t_max_wait; |
380 | stats.u.run.rs_locked = jiffies; | |
381 | stats.u.run.rs_running = jbd2_time_diff(commit_transaction->t_start, | |
382 | stats.u.run.rs_locked); | |
383 | ||
470decc6 DK |
384 | spin_lock(&commit_transaction->t_handle_lock); |
385 | while (commit_transaction->t_updates) { | |
386 | DEFINE_WAIT(wait); | |
387 | ||
388 | prepare_to_wait(&journal->j_wait_updates, &wait, | |
389 | TASK_UNINTERRUPTIBLE); | |
390 | if (commit_transaction->t_updates) { | |
391 | spin_unlock(&commit_transaction->t_handle_lock); | |
392 | spin_unlock(&journal->j_state_lock); | |
393 | schedule(); | |
394 | spin_lock(&journal->j_state_lock); | |
395 | spin_lock(&commit_transaction->t_handle_lock); | |
396 | } | |
397 | finish_wait(&journal->j_wait_updates, &wait); | |
398 | } | |
399 | spin_unlock(&commit_transaction->t_handle_lock); | |
400 | ||
401 | J_ASSERT (commit_transaction->t_outstanding_credits <= | |
402 | journal->j_max_transaction_buffers); | |
403 | ||
404 | /* | |
405 | * First thing we are allowed to do is to discard any remaining | |
406 | * BJ_Reserved buffers. Note, it is _not_ permissible to assume | |
407 | * that there are no such buffers: if a large filesystem | |
408 | * operation like a truncate needs to split itself over multiple | |
f7f4bccb | 409 | * transactions, then it may try to do a jbd2_journal_restart() while |
470decc6 DK |
410 | * there are still BJ_Reserved buffers outstanding. These must |
411 | * be released cleanly from the current transaction. | |
412 | * | |
413 | * In this case, the filesystem must still reserve write access | |
414 | * again before modifying the buffer in the new transaction, but | |
415 | * we do not require it to remember exactly which old buffers it | |
416 | * has reserved. This is consistent with the existing behaviour | |
f7f4bccb | 417 | * that multiple jbd2_journal_get_write_access() calls to the same |
470decc6 DK |
418 | * buffer are perfectly permissable. |
419 | */ | |
420 | while (commit_transaction->t_reserved_list) { | |
421 | jh = commit_transaction->t_reserved_list; | |
422 | JBUFFER_TRACE(jh, "reserved, unused: refile"); | |
423 | /* | |
f7f4bccb | 424 | * A jbd2_journal_get_undo_access()+jbd2_journal_release_buffer() may |
470decc6 DK |
425 | * leave undo-committed data. |
426 | */ | |
427 | if (jh->b_committed_data) { | |
428 | struct buffer_head *bh = jh2bh(jh); | |
429 | ||
430 | jbd_lock_bh_state(bh); | |
af1e76d6 | 431 | jbd2_free(jh->b_committed_data, bh->b_size); |
470decc6 DK |
432 | jh->b_committed_data = NULL; |
433 | jbd_unlock_bh_state(bh); | |
434 | } | |
f7f4bccb | 435 | jbd2_journal_refile_buffer(journal, jh); |
470decc6 DK |
436 | } |
437 | ||
438 | /* | |
439 | * Now try to drop any written-back buffers from the journal's | |
440 | * checkpoint lists. We do this *before* commit because it potentially | |
441 | * frees some memory | |
442 | */ | |
443 | spin_lock(&journal->j_list_lock); | |
f7f4bccb | 444 | __jbd2_journal_clean_checkpoint_list(journal); |
470decc6 DK |
445 | spin_unlock(&journal->j_list_lock); |
446 | ||
447 | jbd_debug (3, "JBD: commit phase 1\n"); | |
448 | ||
449 | /* | |
450 | * Switch to a new revoke table. | |
451 | */ | |
f7f4bccb | 452 | jbd2_journal_switch_revoke_table(journal); |
470decc6 | 453 | |
8e85fb3f JL |
454 | stats.u.run.rs_flushing = jiffies; |
455 | stats.u.run.rs_locked = jbd2_time_diff(stats.u.run.rs_locked, | |
456 | stats.u.run.rs_flushing); | |
457 | ||
470decc6 DK |
458 | commit_transaction->t_state = T_FLUSH; |
459 | journal->j_committing_transaction = commit_transaction; | |
460 | journal->j_running_transaction = NULL; | |
461 | commit_transaction->t_log_start = journal->j_head; | |
462 | wake_up(&journal->j_wait_transaction_locked); | |
463 | spin_unlock(&journal->j_state_lock); | |
464 | ||
465 | jbd_debug (3, "JBD: commit phase 2\n"); | |
466 | ||
470decc6 DK |
467 | /* |
468 | * Now start flushing things to disk, in the order they appear | |
469 | * on the transaction lists. Data blocks go first. | |
470 | */ | |
cd1aac32 | 471 | err = journal_submit_data_buffers(journal, commit_transaction); |
470decc6 | 472 | if (err) |
a7fa2baf | 473 | jbd2_journal_abort(journal, err); |
470decc6 | 474 | |
f7f4bccb | 475 | jbd2_journal_write_revoke_records(journal, commit_transaction); |
470decc6 DK |
476 | |
477 | jbd_debug(3, "JBD: commit phase 2\n"); | |
478 | ||
470decc6 DK |
479 | /* |
480 | * Way to go: we have now written out all of the data for a | |
481 | * transaction! Now comes the tricky part: we need to write out | |
482 | * metadata. Loop over the transaction's entire buffer list: | |
483 | */ | |
02c471cb | 484 | spin_lock(&journal->j_state_lock); |
470decc6 | 485 | commit_transaction->t_state = T_COMMIT; |
02c471cb | 486 | spin_unlock(&journal->j_state_lock); |
470decc6 | 487 | |
8e85fb3f JL |
488 | stats.u.run.rs_logging = jiffies; |
489 | stats.u.run.rs_flushing = jbd2_time_diff(stats.u.run.rs_flushing, | |
490 | stats.u.run.rs_logging); | |
491 | stats.u.run.rs_blocks = commit_transaction->t_outstanding_credits; | |
492 | stats.u.run.rs_blocks_logged = 0; | |
493 | ||
1dfc3220 JB |
494 | J_ASSERT(commit_transaction->t_nr_buffers <= |
495 | commit_transaction->t_outstanding_credits); | |
496 | ||
87c89c23 | 497 | err = 0; |
470decc6 DK |
498 | descriptor = NULL; |
499 | bufs = 0; | |
500 | while (commit_transaction->t_buffers) { | |
501 | ||
502 | /* Find the next buffer to be journaled... */ | |
503 | ||
504 | jh = commit_transaction->t_buffers; | |
505 | ||
506 | /* If we're in abort mode, we just un-journal the buffer and | |
507 | release it for background writing. */ | |
508 | ||
509 | if (is_journal_aborted(journal)) { | |
510 | JBUFFER_TRACE(jh, "journal is aborting: refile"); | |
f7f4bccb | 511 | jbd2_journal_refile_buffer(journal, jh); |
470decc6 DK |
512 | /* If that was the last one, we need to clean up |
513 | * any descriptor buffers which may have been | |
514 | * already allocated, even if we are now | |
515 | * aborting. */ | |
516 | if (!commit_transaction->t_buffers) | |
517 | goto start_journal_io; | |
518 | continue; | |
519 | } | |
520 | ||
521 | /* Make sure we have a descriptor block in which to | |
522 | record the metadata buffer. */ | |
523 | ||
524 | if (!descriptor) { | |
525 | struct buffer_head *bh; | |
526 | ||
527 | J_ASSERT (bufs == 0); | |
528 | ||
529 | jbd_debug(4, "JBD: get descriptor\n"); | |
530 | ||
f7f4bccb | 531 | descriptor = jbd2_journal_get_descriptor_buffer(journal); |
470decc6 | 532 | if (!descriptor) { |
a7fa2baf | 533 | jbd2_journal_abort(journal, -EIO); |
470decc6 DK |
534 | continue; |
535 | } | |
536 | ||
537 | bh = jh2bh(descriptor); | |
538 | jbd_debug(4, "JBD: got buffer %llu (%p)\n", | |
539 | (unsigned long long)bh->b_blocknr, bh->b_data); | |
540 | header = (journal_header_t *)&bh->b_data[0]; | |
f7f4bccb MC |
541 | header->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); |
542 | header->h_blocktype = cpu_to_be32(JBD2_DESCRIPTOR_BLOCK); | |
470decc6 DK |
543 | header->h_sequence = cpu_to_be32(commit_transaction->t_tid); |
544 | ||
545 | tagp = &bh->b_data[sizeof(journal_header_t)]; | |
546 | space_left = bh->b_size - sizeof(journal_header_t); | |
547 | first_tag = 1; | |
548 | set_buffer_jwrite(bh); | |
549 | set_buffer_dirty(bh); | |
550 | wbuf[bufs++] = bh; | |
551 | ||
552 | /* Record it so that we can wait for IO | |
553 | completion later */ | |
554 | BUFFER_TRACE(bh, "ph3: file as descriptor"); | |
f7f4bccb | 555 | jbd2_journal_file_buffer(descriptor, commit_transaction, |
470decc6 DK |
556 | BJ_LogCtl); |
557 | } | |
558 | ||
559 | /* Where is the buffer to be written? */ | |
560 | ||
f7f4bccb | 561 | err = jbd2_journal_next_log_block(journal, &blocknr); |
470decc6 DK |
562 | /* If the block mapping failed, just abandon the buffer |
563 | and repeat this loop: we'll fall into the | |
564 | refile-on-abort condition above. */ | |
565 | if (err) { | |
a7fa2baf | 566 | jbd2_journal_abort(journal, err); |
470decc6 DK |
567 | continue; |
568 | } | |
569 | ||
570 | /* | |
571 | * start_this_handle() uses t_outstanding_credits to determine | |
572 | * the free space in the log, but this counter is changed | |
f7f4bccb | 573 | * by jbd2_journal_next_log_block() also. |
470decc6 DK |
574 | */ |
575 | commit_transaction->t_outstanding_credits--; | |
576 | ||
577 | /* Bump b_count to prevent truncate from stumbling over | |
578 | the shadowed buffer! @@@ This can go if we ever get | |
579 | rid of the BJ_IO/BJ_Shadow pairing of buffers. */ | |
580 | atomic_inc(&jh2bh(jh)->b_count); | |
581 | ||
582 | /* Make a temporary IO buffer with which to write it out | |
583 | (this will requeue both the metadata buffer and the | |
584 | temporary IO buffer). new_bh goes on BJ_IO*/ | |
585 | ||
586 | set_bit(BH_JWrite, &jh2bh(jh)->b_state); | |
587 | /* | |
f7f4bccb | 588 | * akpm: jbd2_journal_write_metadata_buffer() sets |
470decc6 DK |
589 | * new_bh->b_transaction to commit_transaction. |
590 | * We need to clean this up before we release new_bh | |
591 | * (which is of type BJ_IO) | |
592 | */ | |
593 | JBUFFER_TRACE(jh, "ph3: write metadata"); | |
f7f4bccb | 594 | flags = jbd2_journal_write_metadata_buffer(commit_transaction, |
470decc6 DK |
595 | jh, &new_jh, blocknr); |
596 | set_bit(BH_JWrite, &jh2bh(new_jh)->b_state); | |
597 | wbuf[bufs++] = jh2bh(new_jh); | |
598 | ||
599 | /* Record the new block's tag in the current descriptor | |
600 | buffer */ | |
601 | ||
602 | tag_flag = 0; | |
603 | if (flags & 1) | |
f7f4bccb | 604 | tag_flag |= JBD2_FLAG_ESCAPE; |
470decc6 | 605 | if (!first_tag) |
f7f4bccb | 606 | tag_flag |= JBD2_FLAG_SAME_UUID; |
470decc6 DK |
607 | |
608 | tag = (journal_block_tag_t *) tagp; | |
b517bea1 | 609 | write_tag_block(tag_bytes, tag, jh2bh(jh)->b_blocknr); |
470decc6 | 610 | tag->t_flags = cpu_to_be32(tag_flag); |
b517bea1 ZB |
611 | tagp += tag_bytes; |
612 | space_left -= tag_bytes; | |
470decc6 DK |
613 | |
614 | if (first_tag) { | |
615 | memcpy (tagp, journal->j_uuid, 16); | |
616 | tagp += 16; | |
617 | space_left -= 16; | |
618 | first_tag = 0; | |
619 | } | |
620 | ||
621 | /* If there's no more to do, or if the descriptor is full, | |
622 | let the IO rip! */ | |
623 | ||
624 | if (bufs == journal->j_wbufsize || | |
625 | commit_transaction->t_buffers == NULL || | |
b517bea1 | 626 | space_left < tag_bytes + 16) { |
470decc6 DK |
627 | |
628 | jbd_debug(4, "JBD: Submit %d IOs\n", bufs); | |
629 | ||
630 | /* Write an end-of-descriptor marker before | |
631 | submitting the IOs. "tag" still points to | |
632 | the last tag we set up. */ | |
633 | ||
f7f4bccb | 634 | tag->t_flags |= cpu_to_be32(JBD2_FLAG_LAST_TAG); |
470decc6 DK |
635 | |
636 | start_journal_io: | |
637 | for (i = 0; i < bufs; i++) { | |
638 | struct buffer_head *bh = wbuf[i]; | |
818d276c GS |
639 | /* |
640 | * Compute checksum. | |
641 | */ | |
642 | if (JBD2_HAS_COMPAT_FEATURE(journal, | |
643 | JBD2_FEATURE_COMPAT_CHECKSUM)) { | |
644 | crc32_sum = | |
645 | jbd2_checksum_data(crc32_sum, bh); | |
646 | } | |
647 | ||
470decc6 DK |
648 | lock_buffer(bh); |
649 | clear_buffer_dirty(bh); | |
650 | set_buffer_uptodate(bh); | |
651 | bh->b_end_io = journal_end_buffer_io_sync; | |
652 | submit_bh(WRITE, bh); | |
653 | } | |
654 | cond_resched(); | |
8e85fb3f | 655 | stats.u.run.rs_blocks_logged += bufs; |
470decc6 DK |
656 | |
657 | /* Force a new descriptor to be generated next | |
658 | time round the loop. */ | |
659 | descriptor = NULL; | |
660 | bufs = 0; | |
661 | } | |
662 | } | |
663 | ||
818d276c GS |
664 | /* Done it all: now write the commit record asynchronously. */ |
665 | ||
666 | if (JBD2_HAS_INCOMPAT_FEATURE(journal, | |
667 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { | |
668 | err = journal_submit_commit_record(journal, commit_transaction, | |
669 | &cbh, crc32_sum); | |
670 | if (err) | |
671 | __jbd2_journal_abort_hard(journal); | |
818d276c GS |
672 | } |
673 | ||
c851ed54 JK |
674 | /* |
675 | * This is the right place to wait for data buffers both for ASYNC | |
676 | * and !ASYNC commit. If commit is ASYNC, we need to wait only after | |
677 | * the commit block went to disk (which happens above). If commit is | |
678 | * SYNC, we need to wait for data buffers before we start writing | |
679 | * commit block, which happens below in such setting. | |
680 | */ | |
681 | err = journal_finish_inode_data_buffers(journal, commit_transaction); | |
e9e34f4e | 682 | if (err) { |
e9e34f4e HK |
683 | printk(KERN_WARNING |
684 | "JBD2: Detected IO errors while flushing file data " | |
05496769 | 685 | "on %s\n", journal->j_devname); |
e9e34f4e HK |
686 | err = 0; |
687 | } | |
c851ed54 | 688 | |
470decc6 DK |
689 | /* Lo and behold: we have just managed to send a transaction to |
690 | the log. Before we can commit it, wait for the IO so far to | |
691 | complete. Control buffers being written are on the | |
692 | transaction's t_log_list queue, and metadata buffers are on | |
693 | the t_iobuf_list queue. | |
694 | ||
695 | Wait for the buffers in reverse order. That way we are | |
696 | less likely to be woken up until all IOs have completed, and | |
697 | so we incur less scheduling load. | |
698 | */ | |
699 | ||
87c89c23 | 700 | jbd_debug(3, "JBD: commit phase 3\n"); |
470decc6 DK |
701 | |
702 | /* | |
703 | * akpm: these are BJ_IO, and j_list_lock is not needed. | |
704 | * See __journal_try_to_free_buffer. | |
705 | */ | |
706 | wait_for_iobuf: | |
707 | while (commit_transaction->t_iobuf_list != NULL) { | |
708 | struct buffer_head *bh; | |
709 | ||
710 | jh = commit_transaction->t_iobuf_list->b_tprev; | |
711 | bh = jh2bh(jh); | |
712 | if (buffer_locked(bh)) { | |
713 | wait_on_buffer(bh); | |
714 | goto wait_for_iobuf; | |
715 | } | |
716 | if (cond_resched()) | |
717 | goto wait_for_iobuf; | |
718 | ||
719 | if (unlikely(!buffer_uptodate(bh))) | |
720 | err = -EIO; | |
721 | ||
722 | clear_buffer_jwrite(bh); | |
723 | ||
724 | JBUFFER_TRACE(jh, "ph4: unfile after journal write"); | |
f7f4bccb | 725 | jbd2_journal_unfile_buffer(journal, jh); |
470decc6 DK |
726 | |
727 | /* | |
728 | * ->t_iobuf_list should contain only dummy buffer_heads | |
f7f4bccb | 729 | * which were created by jbd2_journal_write_metadata_buffer(). |
470decc6 DK |
730 | */ |
731 | BUFFER_TRACE(bh, "dumping temporary bh"); | |
f7f4bccb | 732 | jbd2_journal_put_journal_head(jh); |
470decc6 DK |
733 | __brelse(bh); |
734 | J_ASSERT_BH(bh, atomic_read(&bh->b_count) == 0); | |
735 | free_buffer_head(bh); | |
736 | ||
737 | /* We also have to unlock and free the corresponding | |
738 | shadowed buffer */ | |
739 | jh = commit_transaction->t_shadow_list->b_tprev; | |
740 | bh = jh2bh(jh); | |
741 | clear_bit(BH_JWrite, &bh->b_state); | |
742 | J_ASSERT_BH(bh, buffer_jbddirty(bh)); | |
743 | ||
744 | /* The metadata is now released for reuse, but we need | |
745 | to remember it against this transaction so that when | |
746 | we finally commit, we can do any checkpointing | |
747 | required. */ | |
748 | JBUFFER_TRACE(jh, "file as BJ_Forget"); | |
f7f4bccb | 749 | jbd2_journal_file_buffer(jh, commit_transaction, BJ_Forget); |
470decc6 DK |
750 | /* Wake up any transactions which were waiting for this |
751 | IO to complete */ | |
752 | wake_up_bit(&bh->b_state, BH_Unshadow); | |
753 | JBUFFER_TRACE(jh, "brelse shadowed buffer"); | |
754 | __brelse(bh); | |
755 | } | |
756 | ||
757 | J_ASSERT (commit_transaction->t_shadow_list == NULL); | |
758 | ||
87c89c23 | 759 | jbd_debug(3, "JBD: commit phase 4\n"); |
470decc6 DK |
760 | |
761 | /* Here we wait for the revoke record and descriptor record buffers */ | |
762 | wait_for_ctlbuf: | |
763 | while (commit_transaction->t_log_list != NULL) { | |
764 | struct buffer_head *bh; | |
765 | ||
766 | jh = commit_transaction->t_log_list->b_tprev; | |
767 | bh = jh2bh(jh); | |
768 | if (buffer_locked(bh)) { | |
769 | wait_on_buffer(bh); | |
770 | goto wait_for_ctlbuf; | |
771 | } | |
772 | if (cond_resched()) | |
773 | goto wait_for_ctlbuf; | |
774 | ||
775 | if (unlikely(!buffer_uptodate(bh))) | |
776 | err = -EIO; | |
777 | ||
778 | BUFFER_TRACE(bh, "ph5: control buffer writeout done: unfile"); | |
779 | clear_buffer_jwrite(bh); | |
f7f4bccb MC |
780 | jbd2_journal_unfile_buffer(journal, jh); |
781 | jbd2_journal_put_journal_head(jh); | |
470decc6 DK |
782 | __brelse(bh); /* One for getblk */ |
783 | /* AKPM: bforget here */ | |
784 | } | |
785 | ||
77e841de HK |
786 | if (err) |
787 | jbd2_journal_abort(journal, err); | |
788 | ||
87c89c23 | 789 | jbd_debug(3, "JBD: commit phase 5\n"); |
470decc6 | 790 | |
818d276c GS |
791 | if (!JBD2_HAS_INCOMPAT_FEATURE(journal, |
792 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) { | |
793 | err = journal_submit_commit_record(journal, commit_transaction, | |
794 | &cbh, crc32_sum); | |
795 | if (err) | |
796 | __jbd2_journal_abort_hard(journal); | |
797 | } | |
b048d846 MC |
798 | if (!err && !is_journal_aborted(journal)) |
799 | err = journal_wait_on_commit_record(cbh); | |
470decc6 DK |
800 | |
801 | if (err) | |
a7fa2baf | 802 | jbd2_journal_abort(journal, err); |
470decc6 DK |
803 | |
804 | /* End of a transaction! Finally, we can do checkpoint | |
805 | processing: any buffers committed as a result of this | |
806 | transaction can be removed from any checkpoint list it was on | |
807 | before. */ | |
808 | ||
87c89c23 | 809 | jbd_debug(3, "JBD: commit phase 6\n"); |
470decc6 | 810 | |
c851ed54 | 811 | J_ASSERT(list_empty(&commit_transaction->t_inode_list)); |
470decc6 DK |
812 | J_ASSERT(commit_transaction->t_buffers == NULL); |
813 | J_ASSERT(commit_transaction->t_checkpoint_list == NULL); | |
814 | J_ASSERT(commit_transaction->t_iobuf_list == NULL); | |
815 | J_ASSERT(commit_transaction->t_shadow_list == NULL); | |
816 | J_ASSERT(commit_transaction->t_log_list == NULL); | |
817 | ||
818 | restart_loop: | |
819 | /* | |
820 | * As there are other places (journal_unmap_buffer()) adding buffers | |
821 | * to this list we have to be careful and hold the j_list_lock. | |
822 | */ | |
823 | spin_lock(&journal->j_list_lock); | |
824 | while (commit_transaction->t_forget) { | |
825 | transaction_t *cp_transaction; | |
826 | struct buffer_head *bh; | |
827 | ||
828 | jh = commit_transaction->t_forget; | |
829 | spin_unlock(&journal->j_list_lock); | |
830 | bh = jh2bh(jh); | |
831 | jbd_lock_bh_state(bh); | |
832 | J_ASSERT_JH(jh, jh->b_transaction == commit_transaction || | |
833 | jh->b_transaction == journal->j_running_transaction); | |
834 | ||
835 | /* | |
836 | * If there is undo-protected committed data against | |
837 | * this buffer, then we can remove it now. If it is a | |
838 | * buffer needing such protection, the old frozen_data | |
839 | * field now points to a committed version of the | |
840 | * buffer, so rotate that field to the new committed | |
841 | * data. | |
842 | * | |
843 | * Otherwise, we can just throw away the frozen data now. | |
844 | */ | |
845 | if (jh->b_committed_data) { | |
af1e76d6 | 846 | jbd2_free(jh->b_committed_data, bh->b_size); |
470decc6 DK |
847 | jh->b_committed_data = NULL; |
848 | if (jh->b_frozen_data) { | |
849 | jh->b_committed_data = jh->b_frozen_data; | |
850 | jh->b_frozen_data = NULL; | |
851 | } | |
852 | } else if (jh->b_frozen_data) { | |
af1e76d6 | 853 | jbd2_free(jh->b_frozen_data, bh->b_size); |
470decc6 DK |
854 | jh->b_frozen_data = NULL; |
855 | } | |
856 | ||
857 | spin_lock(&journal->j_list_lock); | |
858 | cp_transaction = jh->b_cp_transaction; | |
859 | if (cp_transaction) { | |
860 | JBUFFER_TRACE(jh, "remove from old cp transaction"); | |
8e85fb3f | 861 | cp_transaction->t_chp_stats.cs_dropped++; |
f7f4bccb | 862 | __jbd2_journal_remove_checkpoint(jh); |
470decc6 DK |
863 | } |
864 | ||
865 | /* Only re-checkpoint the buffer_head if it is marked | |
866 | * dirty. If the buffer was added to the BJ_Forget list | |
f7f4bccb | 867 | * by jbd2_journal_forget, it may no longer be dirty and |
470decc6 DK |
868 | * there's no point in keeping a checkpoint record for |
869 | * it. */ | |
870 | ||
871 | /* A buffer which has been freed while still being | |
872 | * journaled by a previous transaction may end up still | |
873 | * being dirty here, but we want to avoid writing back | |
874 | * that buffer in the future now that the last use has | |
875 | * been committed. That's not only a performance gain, | |
876 | * it also stops aliasing problems if the buffer is left | |
877 | * behind for writeback and gets reallocated for another | |
878 | * use in a different page. */ | |
879 | if (buffer_freed(bh)) { | |
880 | clear_buffer_freed(bh); | |
881 | clear_buffer_jbddirty(bh); | |
882 | } | |
883 | ||
884 | if (buffer_jbddirty(bh)) { | |
885 | JBUFFER_TRACE(jh, "add to new checkpointing trans"); | |
f7f4bccb | 886 | __jbd2_journal_insert_checkpoint(jh, commit_transaction); |
470decc6 | 887 | JBUFFER_TRACE(jh, "refile for checkpoint writeback"); |
f7f4bccb | 888 | __jbd2_journal_refile_buffer(jh); |
470decc6 DK |
889 | jbd_unlock_bh_state(bh); |
890 | } else { | |
891 | J_ASSERT_BH(bh, !buffer_dirty(bh)); | |
892 | /* The buffer on BJ_Forget list and not jbddirty means | |
893 | * it has been freed by this transaction and hence it | |
894 | * could not have been reallocated until this | |
895 | * transaction has committed. *BUT* it could be | |
896 | * reallocated once we have written all the data to | |
897 | * disk and before we process the buffer on BJ_Forget | |
898 | * list. */ | |
899 | JBUFFER_TRACE(jh, "refile or unfile freed buffer"); | |
f7f4bccb | 900 | __jbd2_journal_refile_buffer(jh); |
470decc6 DK |
901 | if (!jh->b_transaction) { |
902 | jbd_unlock_bh_state(bh); | |
903 | /* needs a brelse */ | |
f7f4bccb | 904 | jbd2_journal_remove_journal_head(bh); |
470decc6 DK |
905 | release_buffer_page(bh); |
906 | } else | |
907 | jbd_unlock_bh_state(bh); | |
908 | } | |
909 | cond_resched_lock(&journal->j_list_lock); | |
910 | } | |
911 | spin_unlock(&journal->j_list_lock); | |
912 | /* | |
f5a7a6b0 JK |
913 | * This is a bit sleazy. We use j_list_lock to protect transition |
914 | * of a transaction into T_FINISHED state and calling | |
915 | * __jbd2_journal_drop_transaction(). Otherwise we could race with | |
916 | * other checkpointing code processing the transaction... | |
470decc6 DK |
917 | */ |
918 | spin_lock(&journal->j_state_lock); | |
919 | spin_lock(&journal->j_list_lock); | |
920 | /* | |
921 | * Now recheck if some buffers did not get attached to the transaction | |
922 | * while the lock was dropped... | |
923 | */ | |
924 | if (commit_transaction->t_forget) { | |
925 | spin_unlock(&journal->j_list_lock); | |
926 | spin_unlock(&journal->j_state_lock); | |
927 | goto restart_loop; | |
928 | } | |
929 | ||
930 | /* Done with this transaction! */ | |
931 | ||
87c89c23 | 932 | jbd_debug(3, "JBD: commit phase 7\n"); |
470decc6 DK |
933 | |
934 | J_ASSERT(commit_transaction->t_state == T_COMMIT); | |
935 | ||
8e85fb3f JL |
936 | commit_transaction->t_start = jiffies; |
937 | stats.u.run.rs_logging = jbd2_time_diff(stats.u.run.rs_logging, | |
938 | commit_transaction->t_start); | |
939 | ||
940 | /* | |
941 | * File the transaction for history | |
942 | */ | |
943 | stats.ts_type = JBD2_STATS_RUN; | |
944 | stats.ts_tid = commit_transaction->t_tid; | |
945 | stats.u.run.rs_handle_count = commit_transaction->t_handle_count; | |
946 | spin_lock(&journal->j_history_lock); | |
947 | memcpy(journal->j_history + journal->j_history_cur, &stats, | |
948 | sizeof(stats)); | |
949 | if (++journal->j_history_cur == journal->j_history_max) | |
950 | journal->j_history_cur = 0; | |
951 | ||
952 | /* | |
953 | * Calculate overall stats | |
954 | */ | |
955 | journal->j_stats.ts_tid++; | |
956 | journal->j_stats.u.run.rs_wait += stats.u.run.rs_wait; | |
957 | journal->j_stats.u.run.rs_running += stats.u.run.rs_running; | |
958 | journal->j_stats.u.run.rs_locked += stats.u.run.rs_locked; | |
959 | journal->j_stats.u.run.rs_flushing += stats.u.run.rs_flushing; | |
960 | journal->j_stats.u.run.rs_logging += stats.u.run.rs_logging; | |
961 | journal->j_stats.u.run.rs_handle_count += stats.u.run.rs_handle_count; | |
962 | journal->j_stats.u.run.rs_blocks += stats.u.run.rs_blocks; | |
963 | journal->j_stats.u.run.rs_blocks_logged += stats.u.run.rs_blocks_logged; | |
964 | spin_unlock(&journal->j_history_lock); | |
965 | ||
470decc6 DK |
966 | commit_transaction->t_state = T_FINISHED; |
967 | J_ASSERT(commit_transaction == journal->j_committing_transaction); | |
968 | journal->j_commit_sequence = commit_transaction->t_tid; | |
969 | journal->j_committing_transaction = NULL; | |
970 | spin_unlock(&journal->j_state_lock); | |
971 | ||
f89b7795 JK |
972 | if (commit_transaction->t_checkpoint_list == NULL && |
973 | commit_transaction->t_checkpoint_io_list == NULL) { | |
f7f4bccb | 974 | __jbd2_journal_drop_transaction(journal, commit_transaction); |
470decc6 DK |
975 | } else { |
976 | if (journal->j_checkpoint_transactions == NULL) { | |
977 | journal->j_checkpoint_transactions = commit_transaction; | |
978 | commit_transaction->t_cpnext = commit_transaction; | |
979 | commit_transaction->t_cpprev = commit_transaction; | |
980 | } else { | |
981 | commit_transaction->t_cpnext = | |
982 | journal->j_checkpoint_transactions; | |
983 | commit_transaction->t_cpprev = | |
984 | commit_transaction->t_cpnext->t_cpprev; | |
985 | commit_transaction->t_cpnext->t_cpprev = | |
986 | commit_transaction; | |
987 | commit_transaction->t_cpprev->t_cpnext = | |
988 | commit_transaction; | |
989 | } | |
990 | } | |
991 | spin_unlock(&journal->j_list_lock); | |
992 | ||
ede86cc4 TT |
993 | trace_mark(jbd2_end_commit, "dev %s transaction %d head %d", |
994 | journal->j_devname, commit_transaction->t_tid, | |
995 | journal->j_tail_sequence); | |
470decc6 DK |
996 | jbd_debug(1, "JBD: commit %d complete, head %d\n", |
997 | journal->j_commit_sequence, journal->j_tail_sequence); | |
998 | ||
999 | wake_up(&journal->j_wait_done_commit); | |
1000 | } |