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-rw-r--r--fs/jbd2/commit.c56
1 files changed, 31 insertions, 25 deletions
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index f3ad1598b20..7f21cf3aaf9 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -105,6 +105,8 @@ static int journal_submit_commit_record(journal_t *journal,
int ret;
struct timespec now = current_kernel_time();
+ *cbh = NULL;
+
if (is_journal_aborted(journal))
return 0;
@@ -137,9 +139,9 @@ static int journal_submit_commit_record(journal_t *journal,
if (journal->j_flags & JBD2_BARRIER &&
!JBD2_HAS_INCOMPAT_FEATURE(journal,
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT))
- ret = submit_bh(WRITE_SYNC_PLUG | WRITE_FLUSH_FUA, bh);
+ ret = submit_bh(WRITE_SYNC | WRITE_FLUSH_FUA, bh);
else
- ret = submit_bh(WRITE_SYNC_PLUG, bh);
+ ret = submit_bh(WRITE_SYNC, bh);
*cbh = bh;
return ret;
@@ -217,7 +219,6 @@ static int journal_submit_data_buffers(journal_t *journal,
ret = err;
spin_lock(&journal->j_list_lock);
J_ASSERT(jinode->i_transaction == commit_transaction);
- commit_transaction->t_flushed_data_blocks = 1;
clear_bit(__JI_COMMIT_RUNNING, &jinode->i_flags);
smp_mb__after_clear_bit();
wake_up_bit(&jinode->i_flags, __JI_COMMIT_RUNNING);
@@ -329,19 +330,13 @@ void jbd2_journal_commit_transaction(journal_t *journal)
int tag_bytes = journal_tag_bytes(journal);
struct buffer_head *cbh = NULL; /* For transactional checksums */
__u32 crc32_sum = ~0;
- int write_op = WRITE_SYNC;
+ struct blk_plug plug;
/*
* First job: lock down the current transaction and wait for
* all outstanding updates to complete.
*/
-#ifdef COMMIT_STATS
- spin_lock(&journal->j_list_lock);
- summarise_journal_usage(journal);
- spin_unlock(&journal->j_list_lock);
-#endif
-
/* Do we need to erase the effects of a prior jbd2_journal_flush? */
if (journal->j_flags & JBD2_FLUSHED) {
jbd_debug(3, "super block updated\n");
@@ -363,13 +358,6 @@ void jbd2_journal_commit_transaction(journal_t *journal)
write_lock(&journal->j_state_lock);
commit_transaction->t_state = T_LOCKED;
- /*
- * Use plugged writes here, since we want to submit several before
- * we unplug the device. We don't do explicit unplugging in here,
- * instead we rely on sync_buffer() doing the unplug for us.
- */
- if (commit_transaction->t_synchronous_commit)
- write_op = WRITE_SYNC_PLUG;
trace_jbd2_commit_locking(journal, commit_transaction);
stats.run.rs_wait = commit_transaction->t_max_wait;
stats.run.rs_locked = jiffies;
@@ -410,7 +398,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
* we do not require it to remember exactly which old buffers it
* has reserved. This is consistent with the existing behaviour
* that multiple jbd2_journal_get_write_access() calls to the same
- * buffer are perfectly permissable.
+ * buffer are perfectly permissible.
*/
while (commit_transaction->t_reserved_list) {
jh = commit_transaction->t_reserved_list;
@@ -469,8 +457,10 @@ void jbd2_journal_commit_transaction(journal_t *journal)
if (err)
jbd2_journal_abort(journal, err);
+ blk_start_plug(&plug);
jbd2_journal_write_revoke_records(journal, commit_transaction,
- write_op);
+ WRITE_SYNC);
+ blk_finish_plug(&plug);
jbd_debug(3, "JBD: commit phase 2\n");
@@ -497,6 +487,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
err = 0;
descriptor = NULL;
bufs = 0;
+ blk_start_plug(&plug);
while (commit_transaction->t_buffers) {
/* Find the next buffer to be journaled... */
@@ -658,7 +649,7 @@ start_journal_io:
clear_buffer_dirty(bh);
set_buffer_uptodate(bh);
bh->b_end_io = journal_end_buffer_io_sync;
- submit_bh(write_op, bh);
+ submit_bh(WRITE_SYNC, bh);
}
cond_resched();
stats.run.rs_blocks_logged += bufs;
@@ -680,12 +671,16 @@ start_journal_io:
err = 0;
}
+ write_lock(&journal->j_state_lock);
+ J_ASSERT(commit_transaction->t_state == T_COMMIT);
+ commit_transaction->t_state = T_COMMIT_DFLUSH;
+ write_unlock(&journal->j_state_lock);
/*
* If the journal is not located on the file system device,
* then we must flush the file system device before we issue
* the commit record
*/
- if (commit_transaction->t_flushed_data_blocks &&
+ if (commit_transaction->t_need_data_flush &&
(journal->j_fs_dev != journal->j_dev) &&
(journal->j_flags & JBD2_BARRIER))
blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL);
@@ -699,6 +694,8 @@ start_journal_io:
__jbd2_journal_abort_hard(journal);
}
+ blk_finish_plug(&plug);
+
/* Lo and behold: we have just managed to send a transaction to
the log. Before we can commit it, wait for the IO so far to
complete. Control buffers being written are on the
@@ -760,8 +757,13 @@ wait_for_iobuf:
required. */
JBUFFER_TRACE(jh, "file as BJ_Forget");
jbd2_journal_file_buffer(jh, commit_transaction, BJ_Forget);
- /* Wake up any transactions which were waiting for this
- IO to complete */
+ /*
+ * Wake up any transactions which were waiting for this IO to
+ * complete. The barrier must be here so that changes by
+ * jbd2_journal_file_buffer() take effect before wake_up_bit()
+ * does the waitqueue check.
+ */
+ smp_mb();
wake_up_bit(&bh->b_state, BH_Unshadow);
JBUFFER_TRACE(jh, "brelse shadowed buffer");
__brelse(bh);
@@ -800,6 +802,10 @@ wait_for_iobuf:
jbd2_journal_abort(journal, err);
jbd_debug(3, "JBD: commit phase 5\n");
+ write_lock(&journal->j_state_lock);
+ J_ASSERT(commit_transaction->t_state == T_COMMIT_DFLUSH);
+ commit_transaction->t_state = T_COMMIT_JFLUSH;
+ write_unlock(&journal->j_state_lock);
if (!JBD2_HAS_INCOMPAT_FEATURE(journal,
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) {
@@ -808,7 +814,7 @@ wait_for_iobuf:
if (err)
__jbd2_journal_abort_hard(journal);
}
- if (!err && !is_journal_aborted(journal))
+ if (cbh)
err = journal_wait_on_commit_record(journal, cbh);
if (JBD2_HAS_INCOMPAT_FEATURE(journal,
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT) &&
@@ -955,7 +961,7 @@ restart_loop:
jbd_debug(3, "JBD: commit phase 7\n");
- J_ASSERT(commit_transaction->t_state == T_COMMIT);
+ J_ASSERT(commit_transaction->t_state == T_COMMIT_JFLUSH);
commit_transaction->t_start = jiffies;
stats.run.rs_logging = jbd2_time_diff(stats.run.rs_logging,
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-03-30 21:22:41 +0000