Commit 6103fb43 authored Feb 12, 2014 by Filipe Manana Committed by Josef Bacik Mar 10, 2014

Btrfs: remove unnecessary ref heads rb tree search



When we didn't find the exact ref head we were looking for, if
return_bigger != 0 we set a new search key to match either the
next node after the last one we found or the first one in the
ref heads rb tree, and then did another full tree search. For both
cases this ended up being pointless as we would end up returning
an entry we already had before repeating the search.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>

parent 2c6a92b0

fs/btrfs/delayed-ref.c

+3 −4

Original line number	Diff line number	Diff line
		@@ -205,7 +205,6 @@ find_ref_head(struct rb_root *root, u64 bytenr,
		struct btrfs_delayed_ref_head *entry;
		int cmp = 0;

		again:
		n = root->rb_node;
		entry = NULL;
		while (n) {
		@@ -234,9 +233,9 @@ again:
		n = rb_first(root);
		entry = rb_entry(n, struct btrfs_delayed_ref_head,
		href_node);
		bytenr = entry->node.bytenr;
		return_bigger = 0;
		goto again;
		if (last)
		*last = entry;
		return entry;
		}
		return entry;
		}

Admin message