Package: preload
Version: 0.4-4
Followup-For: Bug #439901
Hi, I'm attaching a simple patch to preload init.d script in order to
have it run at idle priority, i.e. so as to exploit the default CFQ
scheduler of Linux >= 2.6.13 in order to use only idle disk bandwidth.
This seems to optimize performances, by reducing system load and improve
general responsiviness.
Thanks!
--
a.m.
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.23.1
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages preload depends on:
ii libc6 2.6.1-6 GNU C Library: Shared libraries
ii libglib2.0-0 2.14.2-1 The GLib library of C routines
preload recommends no packages.
-- no debconf information
--- debian/init.d 2007-10-29 08:47:52.000000000 +0100
+++ /etc/init.d/preload 2007-10-29 08:47:29.000000000 +0100
@@ -18,6 +18,7 @@
NAME=preload
DESC=preload
DAEMON_OPTS="-s /var/lib/preload/preload.state $DAEMON_OPTS"
+SCHEDULER="/usr/bin/ionice"
test -x $DAEMON || exit 0
@@ -26,12 +27,25 @@
. /etc/default/preload
fi
+#
+# Lower system load by running at idle priority if possible
+# Requires kernel >= 2.6.13 with CFQ scheduler and package util-linux
+#
+
+if [ -x $SCHEDULER ] ; then
+ echo "Ionice scheduler found; running at idle priority"
+ RUNAS="$SCHEDULER -c3"
+else
+ echo "Ionice scheduler not found and/or kernel version < 2.6.13."
+ echo "Consider upgrading and/or installing package util-linux"
+fi
+
set -e
case "$1" in
start)
echo -n "Starting $DESC: "
- if start-stop-daemon --start --quiet -u 0 --exec $DAEMON --
$DAEMON_OPTS ; then
+ if start-stop-daemon --start --quiet -u 0 --exec $RUNAS $DAEMON --
$DAEMON_OPTS ; then
echo "$NAME."
else
echo "already running."
