ntp: avoid unnecessary restart of resolving round on refresh

Don't call NSR_ResolveSources() when a resolving round is already
started. This cuts the number of calls of the system resolver made due
to the refresh command to half.

diff --git a/ntp_sources.c b/ntp_sources.c
index 1257f5775e4a03622b462edfed95fb06a968900a..64d9a8b46323c138639ca855522a29255142ead7 100644 (file)
--- a/ntp_sources.c
+++ b/ntp_sources.c
@@ -1056,7 +1056,10 @@ resolve_source_replacement(SourceRecord *record, int refreshment)
   us->address = *record->remote_addr;
 
   append_unresolved_source(us);
-  NSR_ResolveSources();
+
+  /* Don't restart resolving round if already running */
+  if (!resolving_source)
+    NSR_ResolveSources();
 }
 
 /* ================================================== */