diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 2198ec0e..4e9a571b 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -3140,3 +3140,7 @@ Zoran Turalija <zoran.turalija@gmail.com>
 Stefan Braun <louis.braun@gmx.de>
  for reporting an endless loop in cTextWrapper::Set() in case the given Width is smaller
  than one character
+
+Jochen Dolze <vdr@dolze.de>
+ for changing cThread::SetIOPriority() from "best effort class" to "idle class" in order
+ to improve overall performance when an editing process is running
diff --git a/HISTORY b/HISTORY
index 228222e6..6d9f786f 100644
--- a/HISTORY
+++ b/HISTORY
@@ -7791,7 +7791,7 @@ Video Disk Recorder Revision History
 - Added definitions for older DVB API versions, back until 5.0 (based on a patch from
   Udo Richter).
 
-2013-04-09: Version 2.1.1
+2013-04-10: Version 2.1.1
 
 - Fixed initializing cDevice::keepTracks.
 - Fixed an endless loop in cTextWrapper::Set() in case the given Width is smaller than
@@ -7799,3 +7799,6 @@ Video Disk Recorder Revision History
 - Removed all "modified since version 1.6" markers from PLUGINS.html.
 - Added definitions for older DVB API versions, back until 5.0 (based on a patch from
   Udo Richter).
+- Changed cThread::SetIOPriority() from "best effort class" to "idle class" in order to
+  improve overall performance when an editing process is running (thanks to Jochen
+  Dolze).
diff --git a/thread.c b/thread.c
index b16fc811..17e55b88 100644
--- a/thread.c
+++ b/thread.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: thread.c 2.7 2013/02/22 14:52:49 kls Exp $
+ * $Id: thread.c 3.1 2013/04/10 15:37:32 kls Exp $
  */
 
 #include "thread.h"
@@ -229,7 +229,7 @@ void cThread::SetPriority(int Priority)
 
 void cThread::SetIOPriority(int Priority)
 {
-  if (syscall(SYS_ioprio_set, 1, 0, (Priority & 0xff) | (2 << 13)) < 0) // best effort class
+  if (syscall(SYS_ioprio_set, 1, 0, (Priority & 0xff) | (3 << 13)) < 0) // idle class
      LOG_ERROR;
 }