Btrfs: fix memory leak of log roots
When we abort a transaction while fsyncing, we'll skip freeing log roots
part of committing a transaction, which leads to memory leak.
This adds a 'free log roots' in putting super when no more users hold
references on log roots, so it's safe and clean.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index e8b7a68..8e85e0e 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -2466,8 +2466,10 @@
.process_func = process_one_buffer
};
- ret = walk_log_tree(trans, log, &wc);
- BUG_ON(ret);
+ if (trans) {
+ ret = walk_log_tree(trans, log, &wc);
+ BUG_ON(ret);
+ }
while (1) {
ret = find_first_extent_bit(&log->dirty_log_pages,