diff --git a/src/Makefile b/src/Makefile
index 76c5f03..47f0092 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -20,11 +20,12 @@ USR_CXXFLAGS += -fvisibility=hidden -fvisibility-inlines-hidden
 #USR_CXXFLAGS_Linux += -gz=zlib
 #USR_LDFLAGS_Linux += -Wl,--compress-debug-sections=zlib
 
-# LTO takes a nice chunk out of the .so text size, but blows up the .a
+# LTO takes a nice chunk out of the .so text size, but blows up the .a size
 #USR_CXXFLAGS += -flto
 #USR_LDFLAGS += -flto
 
 # fault on any undefined symbols (eg. from missing LIB_SYS_LIBS)
+# breaks on older ncurses (circa RHEL6) not using the INPUT() trick to pull in libtinfo.so
 USR_LDFLAGS_Linux += -Wl,--no-undefined -Wl,--no-allow-shlib-undefined
 
 endif
diff --git a/src/log.cpp b/src/log.cpp
index 8f411f9..f572343 100644
--- a/src/log.cpp
+++ b/src/log.cpp
@@ -29,8 +29,9 @@
 
 typedef epicsGuard<epicsMutex> Guard;
 
+namespace pvxs {
+
 namespace {
-using namespace pvxs;
 
 DEFINE_LOGGER(logerr, "pvxs.ev");
 
@@ -150,9 +151,7 @@ void logger_prepare(void *unused)
     logger_gbl = new logger_gbl_t;
 }
 
-}
-
-namespace pvxs {
+} // namespace
 
 int logger::init()
 {
@@ -174,11 +173,9 @@ int logger::init()
     return lvl;
 }
 
-void xerrlogHexPrintf(const void *buf, size_t buflen,
-                      const char *fmt, ...)
+void xerrlogHexPrintf(const void *buf, size_t buflen)
 {
     const uint8_t* const cbuf = static_cast<const uint8_t*>(buf);
-    va_list args;
 
     // whole buffer
     for(size_t pos=0; pos<buflen;)
@@ -209,10 +206,6 @@ void xerrlogHexPrintf(const void *buf, size_t buflen,
 
         errlogPrintf("%04x : %s %s %s %s\n", addr, buf[0], buf[1], buf[2], buf[3]);
     }
-
-    va_start(args, fmt);
-    errlogVprintf(fmt, args);
-    va_end(args);
 }
 
 void logger_level_set(const char *name, int lvl)
@@ -224,6 +217,15 @@ void logger_level_set(const char *name, int lvl)
     logger_gbl->set(name, lvl);
 }
 
+void logger_level_clear()
+{
+    epicsThreadOnce(&logger_once, &logger_prepare, nullptr);
+    assert(logger_gbl);
+
+    Guard G(logger_gbl->lock);
+    logger_gbl->config.clear();
+}
+
 void logger_config_env()
 {
     const char *env = getenv("PVXS_LOG");
diff --git a/src/pvxs/log.h b/src/pvxs/log.h
index 891040b..0b039ca 100644
--- a/src/pvxs/log.h
+++ b/src/pvxs/log.h
@@ -26,7 +26,7 @@ enum struct Level {
 };
 
 struct logger {
-    const char *name;
+    const char * const name;
     std::atomic<int> lvl;
     constexpr logger(const char *name) :name(name), lvl{-1} {}
 
@@ -47,8 +47,7 @@ public:
 #define DEFINE_LOGGER(VAR, NAME) static ::pvxs::logger VAR{NAME}
 
 PVXS_API
-void xerrlogHexPrintf(const void *buf, size_t buflen,
-                      const char *fmt, ...) EPICS_PRINTF_STYLE(3,4);
+void xerrlogHexPrintf(const void *buf, size_t buflen);
 
 #define log_test(LOGGER, LVL) (LOGGER).test(::pvxs::Level::LVL)
 
@@ -56,13 +55,20 @@ void xerrlogHexPrintf(const void *buf, size_t buflen,
 
 #define log_vprintf(LOGGER, LVL, FMT, ARGS) do{ if(log_test(LOGGER, LVL)) errlogVprintf(FMT, ARGS); }while(0)
 
-#define log_hex_printf(LOGGER, LVL, BUF, BUFLEN, ...) do{ if(log_test(LOGGER, LVL)) xerrlogHexPrintf(BUF, BUFLEN, __VA_ARGS__); }while(0)
+#define log_hex_printf(LOGGER, LVL, BUF, BUFLEN, ...) do{ if(log_test(LOGGER, LVL)) { \
+        xerrlogHexPrintf(BUF, BUFLEN); \
+        errlogPrintf(__VA_ARGS__); } \
+    }while(0)
 
 //! Set level for a specific logger
 PVXS_API void logger_level_set(const char *name, int lvl);
 inline void logger_level_set(const char *name, Level lvl) {
     logger_level_set(name, int(lvl));
 }
+//! Remove any previously logger configurations.
+//! Does _not_ change any logger::lvl
+//! Use prior to re-applying new configuration.
+PVXS_API void logger_level_clear();
 
 /** Configure logging from environment variable $PVXS_LOG
  *
diff --git a/src/serverget.cpp b/src/serverget.cpp
index e6bbe40..f365cc4 100644
--- a/src/serverget.cpp
+++ b/src/serverget.cpp
@@ -290,8 +290,6 @@ void ServerConn::handle_GPR(pva_app_msg_t cmd)
     from_wire(M, ioid);
     from_wire(M, subcmd);
 
-    Status reply{};
-
     // subcmd bitmask
     // 0x08 - Init
     // 0x10 - Destroy