ceph: use rbtree for mon statfs requests

An rbtree is lighter weight, particularly given we will generally have
very few in-flight statfs requests.

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 4 insertions, 10 deletions

diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index cd5dd805e4b..b58bd918869 100644
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -112,9 +112,8 @@ static int monc_show(struct seq_file *s, void *p)
 {
 	struct ceph_client *client = s->private;
 	struct ceph_mon_statfs_request *req;
-	u64 nexttid = 0;
-	int got;
 	struct ceph_mon_client *monc = &client->monc;
+	struct rb_node *rp;
 
 	mutex_lock(&monc->mutex);
 
@@ -125,17 +124,12 @@ static int monc_show(struct seq_file *s, void *p)
 	if (monc->want_next_osdmap)
 		seq_printf(s, "want next osdmap\n");
 
-	while (nexttid < monc->last_tid) {
-		got = radix_tree_gang_lookup(&monc->statfs_request_tree,
-					     (void **)&req, nexttid, 1);
-		if (got == 0)
-			break;
-		nexttid = req->tid + 1;
-
+	for (rp = rb_first(&monc->statfs_request_tree); rp; rp = rb_next(rp)) {
+		req = rb_entry(rp, struct ceph_mon_statfs_request, node);
 		seq_printf(s, "%lld statfs\n", req->tid);
 	}
-	mutex_unlock(&monc->mutex);
 
+	mutex_unlock(&monc->mutex);
 	return 0;
 }