Commit 5bdbeb21 authored May 29, 2012 by Josef Bacik

Btrfs: fix return code in drop_objectid_items

So dpkg fsync()'s the file and the directory containing the file whenever it
writes to a file which is really slow in btrfs. This is partly because
fsync()'ing a directory _always_ committed the transaction instead of just
going to the tree log. This is because drop_objectid_items() would return 1
since it does a btrfs_search_slot() which returns 1. In tree-log jargon
this means that we have to commit the transaction to be safe. So just check
if ret is greater than 0 and set it to 0 if it does. With this patch we now
use the tree-log instead of committing the entire transaction, which is
twice as fast on my box. Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>

parent 22ee6985

fs/btrfs/tree-log.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -2667,6 +2667,8 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans,
		btrfs_release_path(path);
		}
		btrfs_release_path(path);
		if (ret > 0)
		ret = 0;
		return ret;
		}