Document PETSc and threads problem.

git-svn-id: https://svn.dealii.org/trunk@20632 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/doc/readme-petsc-trilinos.html b/deal.II/doc/readme-petsc-trilinos.html
index 6d08a8d50db835d679bdf55a2b2e13302ebce3e9..1028abf70fb93c4ae03486b217bec1616d1c8cbf 100644 (file)
--- a/deal.II/doc/readme-petsc-trilinos.html
+++ b/deal.II/doc/readme-petsc-trilinos.html
@@ -5,7 +5,7 @@
   <title>The deal.II Readme on interfacing to PETSc and Trilinos</title>
   <link href="screen.css" rel="StyleSheet">
   <meta name="author" content="the deal.II authors <authors @ dealii.org>">
-  <meta name="copyright" content="Copyright (C) 2008, 2009 by the deal.II authors">
+  <meta name="copyright" content="Copyright (C) 2008, 2009, 2010 by the deal.II authors">
   <meta name="date" content="$Date: 2008-10-14 05:36:48 -0500 (Tue, 14 Oct 2008) $">
   <meta name="svn_id" content="$Id: readme.html 17202 2008-10-14 10:36:48Z heister $">
   <meta name="keywords" content="deal.II">
@@ -99,6 +99,14 @@
       this posting to the mailing list</a>. 
       </p>
 
+      <p>
+      There is an additional caveat: PETSc appears not to co-operate well when using
+      threads and some programs crash when deal.II is compiled in its usual mode
+      supporting multithreading. If you see this sort of behavior, we
+      recommend to try disabling multithreading upon configuration of deal.II using the
+      <code>--disable-threads</code> switch to <code>./configure</code>.
+      </p>
+
 
       <h5>Trilinos</h5>