From 32a40098675a22a40afe14b1f76d426308989c4e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Witold=20Kr=C4=99cicki?= <wpk@isc.org>
Date: Mon, 24 Feb 2020 23:21:31 +0100
Subject: [PATCH] usleep in rbtdb

---
 lib/dns/rbtdb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
index c5123748ad..22254813d9 100644
--- a/lib/dns/rbtdb.c
+++ b/lib/dns/rbtdb.c
@@ -15,6 +15,7 @@
 
 #include <inttypes.h>
 #include <stdbool.h>
+#include <unistd.h>
 
 #include <isc/atomic.h>
 #include <isc/crc64.h>
@@ -2809,6 +2810,7 @@ findnodeintree(dns_rbtdb_t *rbtdb, dns_rbt_t *tree, const dns_name_t *name,
 		 */
 		__sync_synchronize();
 		pthread_yield();
+		usleep(10000);
 		locktype = isc_rwlocktype_write;
 		RWLOCK(&rbtdb->tree_lock, locktype);
 		node = NULL;