Btrfs: don't wait around for new log writers on an SSD

Waiting on spindles improves performance, but ssds want all the
IO as quickly as we can push it down.

Signed-off-by: Chris Mason <chris.mason@fusionio.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index b72b068183ec..8c35847d0fee 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1330,7 +1330,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
                 spin_unlock(&root->fs_info->trans_lock);
         }
 
-        if (now < cur_trans->start_time || now - cur_trans->start_time < 1)
+        if (!btrfs_test_opt(root, SSD) &&
+            (now < cur_trans->start_time || now - cur_trans->start_time < 1))
                 should_grow = 1;
 
         do {