From cba293d539b7e0713ac4e87908ea0217b69900f2 Mon Sep 17 00:00:00 2001
From: Bartosz Kostrzewa <bartosz_kostrzewa@fastmail.com>
Date: Sat, 16 Mar 2024 14:04:57 +0100
Subject: [PATCH] display message about using a different mu for the setup only
 if it really differs from the current mu

---
 quda_interface.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/quda_interface.c b/quda_interface.c
index c84a8c275..9d9c350c5 100644
--- a/quda_interface.c
+++ b/quda_interface.c
@@ -1616,7 +1616,7 @@ void _updateQudaMultigridPreconditioner(){
 
     // if we have set an explicit mu value for the generation of our MG setup,
     // we would like to use it here
-    if( fabs(quda_input.mg_setup_2kappamu) > 2*DBL_EPSILON ){
+    if( fabs( fabs(quda_input.mg_setup_2kappamu/2.0/g_kappa) - fabs(quda_mg_param.invert_param->mu) ) > 2*DBL_EPSILON ){
       double save_mu = quda_mg_param.invert_param->mu;
       // note the minus sign
       quda_mg_param.invert_param->mu = -quda_input.mg_setup_2kappamu/2.0/g_kappa;