From 0e5ecf0a762627b949141df1d83094a9b0eb54a8 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Thu, 4 Sep 2014 18:09:29 -0400 Subject: jbd2: optimize jbd2_log_do_checkpoint() a bit When we discover written out buffer in transaction checkpoint list we don't have to recheck validity of a transaction. Either this is the last buffer in a transaction - and then we are done - or this isn't and then we can just take another buffer from the checkpoint list without dropping j_list_lock. Signed-off-by: Jan Kara Signed-off-by: Theodore Ts'o --- fs/jbd2/checkpoint.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'fs/jbd2/checkpoint.c') diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c index 90d6091d7e18..9ffb19cf376b 100644 --- a/fs/jbd2/checkpoint.c +++ b/fs/jbd2/checkpoint.c @@ -285,9 +285,10 @@ restart: if (unlikely(buffer_write_io_error(bh)) && !result) result = -EIO; BUFFER_TRACE(bh, "remove from checkpoint"); - __jbd2_journal_remove_checkpoint(jh); - spin_unlock(&journal->j_list_lock); - goto retry; + if (__jbd2_journal_remove_checkpoint(jh)) + /* The transaction was released; we're done */ + goto out; + continue; } /* * Important: we are about to write the buffer, and -- cgit v1.2.3