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-rw-r--r--fs/jbd2/commit.c50
-rw-r--r--fs/jbd2/journal.c35
-rw-r--r--fs/jbd2/transaction.c24
3 files changed, 78 insertions, 31 deletions
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 750c70148eff..0f53946f13c1 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -382,7 +382,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
int space_left = 0;
int first_tag = 0;
int tag_flag;
- int i, to_free = 0;
+ int i;
int tag_bytes = journal_tag_bytes(journal);
struct buffer_head *cbh = NULL; /* For transactional checksums */
__u32 crc32_sum = ~0;
@@ -1134,7 +1134,7 @@ restart_loop:
journal->j_stats.run.rs_blocks_logged += stats.run.rs_blocks_logged;
spin_unlock(&journal->j_history_lock);
- commit_transaction->t_state = T_FINISHED;
+ commit_transaction->t_state = T_COMMIT_CALLBACK;
J_ASSERT(commit_transaction == journal->j_committing_transaction);
journal->j_commit_sequence = commit_transaction->t_tid;
journal->j_committing_transaction = NULL;
@@ -1149,38 +1149,44 @@ restart_loop:
journal->j_average_commit_time*3) / 4;
else
journal->j_average_commit_time = commit_time;
+
write_unlock(&journal->j_state_lock);
- if (commit_transaction->t_checkpoint_list == NULL &&
- commit_transaction->t_checkpoint_io_list == NULL) {
- __jbd2_journal_drop_transaction(journal, commit_transaction);
- to_free = 1;
+ if (journal->j_checkpoint_transactions == NULL) {
+ journal->j_checkpoint_transactions = commit_transaction;
+ commit_transaction->t_cpnext = commit_transaction;
+ commit_transaction->t_cpprev = commit_transaction;
} else {
- if (journal->j_checkpoint_transactions == NULL) {
- journal->j_checkpoint_transactions = commit_transaction;
- commit_transaction->t_cpnext = commit_transaction;
- commit_transaction->t_cpprev = commit_transaction;
- } else {
- commit_transaction->t_cpnext =
- journal->j_checkpoint_transactions;
- commit_transaction->t_cpprev =
- commit_transaction->t_cpnext->t_cpprev;
- commit_transaction->t_cpnext->t_cpprev =
- commit_transaction;
- commit_transaction->t_cpprev->t_cpnext =
+ commit_transaction->t_cpnext =
+ journal->j_checkpoint_transactions;
+ commit_transaction->t_cpprev =
+ commit_transaction->t_cpnext->t_cpprev;
+ commit_transaction->t_cpnext->t_cpprev =
+ commit_transaction;
+ commit_transaction->t_cpprev->t_cpnext =
commit_transaction;
- }
}
spin_unlock(&journal->j_list_lock);
-
+ /* Drop all spin_locks because commit_callback may be block.
+ * __journal_remove_checkpoint() can not destroy transaction
+ * under us because it is not marked as T_FINISHED yet */
if (journal->j_commit_callback)
journal->j_commit_callback(journal, commit_transaction);
trace_jbd2_end_commit(journal, commit_transaction);
jbd_debug(1, "JBD2: commit %d complete, head %d\n",
journal->j_commit_sequence, journal->j_tail_sequence);
- if (to_free)
- jbd2_journal_free_transaction(commit_transaction);
+ write_lock(&journal->j_state_lock);
+ spin_lock(&journal->j_list_lock);
+ commit_transaction->t_state = T_FINISHED;
+ /* Recheck checkpoint lists after j_list_lock was dropped */
+ if (commit_transaction->t_checkpoint_list == NULL &&
+ commit_transaction->t_checkpoint_io_list == NULL) {
+ __jbd2_journal_drop_transaction(journal, commit_transaction);
+ jbd2_journal_free_transaction(commit_transaction);
+ }
+ spin_unlock(&journal->j_list_lock);
+ write_unlock(&journal->j_state_lock);
wake_up(&journal->j_wait_done_commit);
}
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index ed10991ab006..95457576e434 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -367,8 +367,6 @@ retry_alloc:
}
/* keep subsequent assertions sane */
- new_bh->b_state = 0;
- init_buffer(new_bh, NULL, NULL);
atomic_set(&new_bh->b_count, 1);
new_jh = jbd2_journal_add_journal_head(new_bh); /* This sleeps */
@@ -710,6 +708,37 @@ int jbd2_log_wait_commit(journal_t *journal, tid_t tid)
}
/*
+ * When this function returns the transaction corresponding to tid
+ * will be completed. If the transaction has currently running, start
+ * committing that transaction before waiting for it to complete. If
+ * the transaction id is stale, it is by definition already completed,
+ * so just return SUCCESS.
+ */
+int jbd2_complete_transaction(journal_t *journal, tid_t tid)
+{
+ int need_to_wait = 1;
+
+ read_lock(&journal->j_state_lock);
+ if (journal->j_running_transaction &&
+ journal->j_running_transaction->t_tid == tid) {
+ if (journal->j_commit_request != tid) {
+ /* transaction not yet started, so request it */
+ read_unlock(&journal->j_state_lock);
+ jbd2_log_start_commit(journal, tid);
+ goto wait_commit;
+ }
+ } else if (!(journal->j_committing_transaction &&
+ journal->j_committing_transaction->t_tid == tid))
+ need_to_wait = 0;
+ read_unlock(&journal->j_state_lock);
+ if (!need_to_wait)
+ return 0;
+wait_commit:
+ return jbd2_log_wait_commit(journal, tid);
+}
+EXPORT_SYMBOL(jbd2_complete_transaction);
+
+/*
* Log buffer allocation routines:
*/
@@ -950,7 +979,7 @@ static const struct seq_operations jbd2_seq_info_ops = {
static int jbd2_seq_info_open(struct inode *inode, struct file *file)
{
- journal_t *journal = PDE(inode)->data;
+ journal_t *journal = PDE_DATA(inode);
struct jbd2_stats_proc_session *s;
int rc, size;
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index d6ee5aed56b1..10f524c59ea8 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -332,7 +332,6 @@ static handle_t *new_handle(int nblocks)
handle_t *handle = jbd2_alloc_handle(GFP_NOFS);
if (!handle)
return NULL;
- memset(handle, 0, sizeof(*handle));
handle->h_buffer_credits = nblocks;
handle->h_ref = 1;
@@ -640,6 +639,7 @@ do_get_write_access(handle_t *handle, struct journal_head *jh,
int error;
char *frozen_buffer = NULL;
int need_copy = 0;
+ unsigned long start_lock, time_lock;
if (is_handle_aborted(handle))
return -EROFS;
@@ -655,9 +655,16 @@ repeat:
/* @@@ Need to check for errors here at some point. */
+ start_lock = jiffies;
lock_buffer(bh);
jbd_lock_bh_state(bh);
+ /* If it takes too long to lock the buffer, trace it */
+ time_lock = jbd2_time_diff(start_lock, jiffies);
+ if (time_lock > HZ/10)
+ trace_jbd2_lock_buffer_stall(bh->b_bdev->bd_dev,
+ jiffies_to_msecs(time_lock));
+
/* We now hold the buffer lock so it is safe to query the buffer
* state. Is the buffer dirty?
*
@@ -1065,9 +1072,12 @@ out:
void jbd2_journal_set_triggers(struct buffer_head *bh,
struct jbd2_buffer_trigger_type *type)
{
- struct journal_head *jh = bh2jh(bh);
+ struct journal_head *jh = jbd2_journal_grab_journal_head(bh);
+ if (WARN_ON(!jh))
+ return;
jh->b_triggers = type;
+ jbd2_journal_put_journal_head(jh);
}
void jbd2_buffer_frozen_trigger(struct journal_head *jh, void *mapped_data,
@@ -1119,17 +1129,18 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
{
transaction_t *transaction = handle->h_transaction;
journal_t *journal = transaction->t_journal;
- struct journal_head *jh = bh2jh(bh);
+ struct journal_head *jh;
int ret = 0;
- jbd_debug(5, "journal_head %p\n", jh);
- JBUFFER_TRACE(jh, "entry");
if (is_handle_aborted(handle))
goto out;
- if (!buffer_jbd(bh)) {
+ jh = jbd2_journal_grab_journal_head(bh);
+ if (!jh) {
ret = -EUCLEAN;
goto out;
}
+ jbd_debug(5, "journal_head %p\n", jh);
+ JBUFFER_TRACE(jh, "entry");
jbd_lock_bh_state(bh);
@@ -1220,6 +1231,7 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
spin_unlock(&journal->j_list_lock);
out_unlock_bh:
jbd_unlock_bh_state(bh);
+ jbd2_journal_put_journal_head(jh);
out:
JBUFFER_TRACE(jh, "exit");
WARN_ON(ret); /* All errors are bugs, so dump the stack */
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