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authorJan Kara <jack@suse.cz>2016-06-30 11:39:38 -0400
committerTheodore Ts'o <tytso@mit.edu>2016-06-30 11:39:38 -0400
commitab714aff4f744f52f0beae93ed441f2f5585eb7a (patch)
tree2c62c6356d6445d05492d3838e2acfc27db4192c /fs/jbd2
parent7a4b188f0c0b49ed8ae41489494a9669ad7f1f8c (diff)
downloadlwn-ab714aff4f744f52f0beae93ed441f2f5585eb7a.tar.gz
lwn-ab714aff4f744f52f0beae93ed441f2f5585eb7a.zip
jbd2: move lockdep tracking to journal_s
Currently lockdep map is tracked in each journal handle. To be able to expand lockdep support to cover also other cases where we depend on transaction commit and where handle is not available, move lockdep map into struct journal_s. Since this makes the lockdep map shared for all handles, we have to use rwsem_acquire_read() for acquisitions now. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2')
-rw-r--r--fs/jbd2/journal.c4
-rw-r--r--fs/jbd2/transaction.c11
2 files changed, 7 insertions, 8 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index b31852f76f46..208e4058040b 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1091,6 +1091,7 @@ static void jbd2_stats_proc_exit(journal_t *journal)
static journal_t * journal_init_common (void)
{
+ static struct lock_class_key jbd2_trans_commit_key;
journal_t *journal;
int err;
@@ -1126,6 +1127,9 @@ static journal_t * journal_init_common (void)
spin_lock_init(&journal->j_history_lock);
+ lockdep_init_map(&journal->j_trans_commit_map, "jbd2_handle",
+ &jbd2_trans_commit_key, 0);
+
return journal;
}
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index 41249538c047..c0065040c5be 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -382,13 +382,11 @@ repeat:
read_unlock(&journal->j_state_lock);
current->journal_info = handle;
- lock_map_acquire(&handle->h_lockdep_map);
+ rwsem_acquire_read(&journal->j_trans_commit_map, 0, 0, _THIS_IP_);
jbd2_journal_free_transaction(new_transaction);
return 0;
}
-static struct lock_class_key jbd2_handle_key;
-
/* Allocate a new handle. This should probably be in a slab... */
static handle_t *new_handle(int nblocks)
{
@@ -398,9 +396,6 @@ static handle_t *new_handle(int nblocks)
handle->h_buffer_credits = nblocks;
handle->h_ref = 1;
- lockdep_init_map(&handle->h_lockdep_map, "jbd2_handle",
- &jbd2_handle_key, 0);
-
return handle;
}
@@ -672,7 +667,7 @@ int jbd2__journal_restart(handle_t *handle, int nblocks, gfp_t gfp_mask)
if (need_to_start)
jbd2_log_start_commit(journal, tid);
- lock_map_release(&handle->h_lockdep_map);
+ rwsem_release(&journal->j_trans_commit_map, 1, _THIS_IP_);
handle->h_buffer_credits = nblocks;
ret = start_this_handle(journal, handle, gfp_mask);
return ret;
@@ -1750,7 +1745,7 @@ int jbd2_journal_stop(handle_t *handle)
wake_up(&journal->j_wait_transaction_locked);
}
- lock_map_release(&handle->h_lockdep_map);
+ rwsem_release(&journal->j_trans_commit_map, 1, _THIS_IP_);
if (wait_for_commit)
err = jbd2_log_wait_commit(journal, tid);