From fb50e707d04bccd641f5349a88b6958ec59735e0 Mon Sep 17 00:00:00 2001
From: kronbichler <kronbichler@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Sun, 1 Dec 2013 20:04:03 +0000
Subject: [PATCH] Add a comment

git-svn-id: https://svn.dealii.org/trunk@31842 0785d39b-7218-0410-832d-ea1e28bc413d
---
 tests/lac/gmres_reorthogonalize_04.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tests/lac/gmres_reorthogonalize_04.cc b/tests/lac/gmres_reorthogonalize_04.cc
index 39525a07d0..4365485eec 100644
--- a/tests/lac/gmres_reorthogonalize_04.cc
+++ b/tests/lac/gmres_reorthogonalize_04.cc
@@ -66,6 +66,9 @@ void test ()
   for (unsigned int i=0; i<n; ++i)
     matrix.diag_element(i) = (i+1);
 
+  // compared to the 02 test, need to use a looser tolerance because linear
+  // summation does not allow for 1e2*eps (at least with the current detection
+  // of re-orthogonalization)
   SolverControl control(1000, 1e3*std::numeric_limits<number>::epsilon());
   typename SolverGMRES<Vector<number> >::AdditionalData data;
   data.max_n_tmp_vectors = 202;
-- 
2.39.5