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| author | Jan Kara <jack@suse.cz> | 2016-02-22 23:20:30 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-02-22 23:20:30 -0500 |
| commit | cb0d9d47a39decbdfaeaa5c063467ed21b2c70b3 (patch) | |
| tree | 51d6e6c3f5de7a093905fed46d0dcad1ab81ab93 | |
| parent | 1101cd4d13ba2f42c5da4c1b9081f35a73b5df31 (diff) | |
| download | linux-cb0d9d47a39decbdfaeaa5c063467ed21b2c70b3.tar.bz2 | |
jbd2: save some atomic ops in __JI_COMMIT_RUNNING handling
Currently we used atomic bit operations to manipulate
__JI_COMMIT_RUNNING bit. However this is unnecessary as i_flags are
always written and read under j_list_lock. So just change the operations
to standard bit operations.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/jbd2/commit.c | 12 | ||||
| -rw-r--r-- | fs/jbd2/journal.c | 2 |
2 files changed, 7 insertions, 7 deletions
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c index ae832cd44dd8..517f2de784cf 100644 --- a/fs/jbd2/commit.c +++ b/fs/jbd2/commit.c @@ -220,7 +220,7 @@ static int journal_submit_data_buffers(journal_t *journal, spin_lock(&journal->j_list_lock); list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) { mapping = jinode->i_vfs_inode->i_mapping; - set_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); + jinode->i_flags |= JI_COMMIT_RUNNING; spin_unlock(&journal->j_list_lock); /* * submit the inode data buffers. We use writepage @@ -234,8 +234,8 @@ static int journal_submit_data_buffers(journal_t *journal, ret = err; spin_lock(&journal->j_list_lock); J_ASSERT(jinode->i_transaction == commit_transaction); - clear_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); - smp_mb__after_atomic(); + jinode->i_flags &= ~JI_COMMIT_RUNNING; + smp_mb(); wake_up_bit(&jinode->i_flags, __JI_COMMIT_RUNNING); } spin_unlock(&journal->j_list_lock); @@ -256,7 +256,7 @@ static int journal_finish_inode_data_buffers(journal_t *journal, /* For locking, see the comment in journal_submit_data_buffers() */ spin_lock(&journal->j_list_lock); list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) { - set_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); + jinode->i_flags |= JI_COMMIT_RUNNING; spin_unlock(&journal->j_list_lock); err = filemap_fdatawait(jinode->i_vfs_inode->i_mapping); if (err) { @@ -272,8 +272,8 @@ static int journal_finish_inode_data_buffers(journal_t *journal, ret = err; } spin_lock(&journal->j_list_lock); - clear_bit(__JI_COMMIT_RUNNING, &jinode->i_flags); - smp_mb__after_atomic(); + jinode->i_flags &= ~JI_COMMIT_RUNNING; + smp_mb(); wake_up_bit(&jinode->i_flags, __JI_COMMIT_RUNNING); } diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index defa962a8e15..7bf1683e81af 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -2587,7 +2587,7 @@ void jbd2_journal_release_jbd_inode(journal_t *journal, restart: spin_lock(&journal->j_list_lock); /* Is commit writing out inode - we have to wait */ - if (test_bit(__JI_COMMIT_RUNNING, &jinode->i_flags)) { + if (jinode->i_flags & JI_COMMIT_RUNNING) { wait_queue_head_t *wq; DEFINE_WAIT_BIT(wait, &jinode->i_flags, __JI_COMMIT_RUNNING); wq = bit_waitqueue(&jinode->i_flags, __JI_COMMIT_RUNNING); |