[boinc-client] Fix CPU scheduling priority of BOINC jobs when cgroups are used

[Miloš Jakubíček]

commit 88e2722e67d98feae417e68dde73bff9da1d7d7e
Author: Milos Jakubicek <xjakub at fi.muni.cz>
Date:   Sat Aug 20 12:33:03 2011 +0200

    Fix CPU scheduling priority of BOINC jobs when cgroups are used
    
    Boinc must be run in a separate cgroup with minimum cpu.share
    (fixes BZ#705444)

 boinc-client-init-d |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/boinc-client-init-d b/boinc-client-init-d
index 6670e7b..bc59d60 100644
--- a/boinc-client-init-d
+++ b/boinc-client-init-d
@@ -53,6 +53,10 @@ BOINCDIR="/var/lib/boinc"
 BOINCEXE="/usr/bin/boinc_client"
 BOINCCMD="/usr/bin/boinccmd"
 
+# Cgroup to be used: this is necessary to ensure low scheduling priority for Boinc
+
+CGROUP_DAEMON="cpu:/background"
+
 # Log and error files (should be placed in /var/log/ to avoid SELinux related issues)
 
 LOGFILE="/var/log/boinc.log"
@@ -96,6 +100,11 @@ if [ ! -x $BOINCEXE ]; then
 	exit 2
 fi
 
+# Create cgroup and set minimum CPU priority
+
+cgcreate -g $CGROUP_DAEMON
+cgset -r cpu.shares=2 `echo $CGROUP_DAEMON | cut -f2 -d:`
+
 # Warn if there are no projects attached
 
 cd $BOINCDIR