From 31cfca9316da2b2b901d384811d80a328eefbcdb Mon Sep 17 00:00:00 2001
From: Hallvard Furuseth <hallvard@openldap.org>
Date: Mon, 23 Sep 2013 20:20:42 +0200
Subject: [PATCH] Tweak MDB_DEBUG output

---
 libraries/liblmdb/mdb.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index f5db761..e991a17 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -4649,7 +4649,7 @@ mdb_page_search_root(MDB_cursor *mc, MDB_val *key, int modify)
 	}
 
 	DPRINTF(("found leaf page %"Z"u for key [%s]", mp->mp_pgno,
-	    key ? DKEY(key) : NULL));
+	    key ? DKEY(key) : "null"));
 	mc->mc_flags |= C_INITIALIZED;
 	mc->mc_flags &= ~C_EOF;
 
@@ -6245,7 +6245,7 @@ mdb_node_add(MDB_cursor *mc, indx_t indx,
 	    IS_LEAF(mp) ? "leaf" : "branch",
 		IS_SUBP(mp) ? "sub-" : "",
 	    mp->mp_pgno, indx, data ? data->mv_size : 0,
-		key ? key->mv_size : 0, key ? DKEY(key) : NULL));
+		key ? key->mv_size : 0, key ? DKEY(key) : "null"));
 
 	if (IS_LEAF2(mp)) {
 		/* Move higher keys up one slot. */
@@ -8323,6 +8323,8 @@ int mdb_reader_check(MDB_env *env, int *dead)
 					if (!mdb_reader_pid(env, Pidcheck, pid)) {
 						for (j=i; j<rdrs; j++)
 							if (mr[j].mr_pid == pid) {
+								DPRINTF(("clear stale reader pid %u txn %"Z"d",
+									(unsigned) pid, mr[j].mr_txnid));
 								mr[j].mr_pid = 0;
 								count++;
 							}