Added basic laptop mode support to power.d

5 files changed, 103 insertions, 1 deletions

diff --git a/pm/power.d/Makefile.am b/pm/power.d/Makefile.am
index 53eea54..157e794 100644
--- a/pm/power.d/Makefile.am
+++ b/pm/power.d/Makefile.am
@@ -1,7 +1,11 @@
 powerdir = $(libdir)/pm-utils/power.d
 
 power_SCRIPTS =			\
-	sched-powersave
+	sched-powersave		\
+	harddrive		\
+	laptop-mode		\
+	xfs_buffer		\
+	readahead
 
 EXTRA_DIST=$(power_SCRIPTS)
 
diff --git a/pm/power.d/harddrive b/pm/power.d/harddrive
new file mode 100644
index 0000000..cdfa637
--- /dev/null
+++ b/pm/power.d/harddrive
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+[ -x /sbin/hdparm ] || exit $NA
+
+harddrive_ac () {
+    for dev in /dev/[hs]d[a-z]; do
+	#enable write caching, do not spin down the drive.
+	hdparm -W 1 -S 0 $dev
+    done
+}
+
+harddrive_battery() {
+    for dev in /dev/[hs]d[a-z]; do
+	# disable write caching, spin down after 30 seconds
+	hdparm -W 0 -S 6 $dev
+    done
+}
+
+case $1 in
+    true) harddrive_battery ;;
+    false) harddrive_ac ;;
+    *) exit $NA ;;
+esac
+
+exit 0
diff --git a/pm/power.d/laptop-mode b/pm/power.d/laptop-mode
new file mode 100644
index 0000000..8e0fbdf
--- /dev/null
+++ b/pm/power.d/laptop-mode
@@ -0,0 +1,29 @@
+#!/bin/sh
+
+VM="/proc/sys/vm"
+
+[ -f $VM/laptop_mode -a -f $VM/dirty_ratio ] || exit $NA
+
+laptop_mode_ac() {
+    echo 0 >$VM/laptop_mode
+    echo 5 >$VM/dirty_background_ratio
+    echo 2999 >$VM/dirty_expire_centisecs
+    echo 10 >$VM/dirty_ratio
+    echo 499 >$VM/dirty_writeback_centisecs
+}
+
+laptop_mode_battery() {
+    echo 1 >$VM/laptop_mode
+    echo 1 >$VM/dirty_background_ratio
+    echo 60000 >$VM/dirty_expire_centisecs
+    echo 60 >$VM/dirty_ratio
+    echo 60000 >$VM/dirty_writeback_centisecs
+}
+
+case $1 in
+    true) laptop_mode_battery ;;
+    false) laptop_mode_ac ;;
+    *) exit $NA ;;
+esac
+
+exit 0
diff --git a/pm/power.d/readahead b/pm/power.d/readahead
new file mode 100644
index 0000000..4247217
--- /dev/null
+++ b/pm/power.d/readahead
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+[ -x /sbin/blockdev ] || exit $NA
+
+readahead() {
+    for dev in $(awk '/^\/dev\// {print $1}'</etc/mtab); do
+	/sbin/blockdev --setfra $1 "$dev"
+    done
+}
+
+case $1 in
+    true) readahead 3072 ;;
+    false) readahead 256 ;;
+    *) exit $NA ;;
+esac
+
+exit 0
diff --git a/pm/power.d/xfs_buffer b/pm/power.d/xfs_buffer
new file mode 100644
index 0000000..7510e68
--- /dev/null
+++ b/pm/power.d/xfs_buffer
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+. "${PM_FUNCTIONS}"
+
+XFS="/proc/sys/fs/xfs"
+[ -f $XFS/age_buffer_centisecs ] || exit $NA
+
+
+xfs_ac() {
+    echo 1500 >$XFS/age_buffer_centisecs
+    echo 3000 >$XFS/xfssyncd_centisecs
+    echo 100  >$XFS/xfsbufd_centisecs
+}
+
+xfs_battery() {
+    echo 60000 >$XFS/age_buffer_centisecs
+    echo 60000 >$XFS/xfssyncd_centisecs
+    echo 3000  >$XFS/xfsbufd_centisecs
+}
+
+case $1 in
+    true) xfs_battery ;;
+    false) xfs_ac ;;
+    *) exit $NA ;;
+esac
+
+exit 0
\ No newline at end of file