[arch-general] /etc/tmpfiles.d

[Matthew Monaco]

On 09/17/2012 09:40 AM, Martín Cigorraga wrote:
> "[...]However, tmpfiles may also be used to write values into certain files
> on boot. For example, if you use /etc/rc.local to disable wakeup from USB
> devices with echo USBE > /proc/acpi/wakeup, you may use the following
> tmpfile instead:
> 
> 
> /etc/tmpfiles.d/disable-usb-wake.conf
> 
> 
> w /proc/acpi/wakeup - - - - USBE
> 
> The tmpfiles method is recommended in this case since systemd doesn't
> actually support /etc/rc.local."
> 
> Does that means that I need to move all the content from /etc/rc.local to
> /etc/tmpfiles.d? For example this is my actual /etc/rc.local:
> ~ $ cat /etc/rc.local
> #!/bin/bash
> #
> # /etc/rc.local: Local multi-user startup script.
> #
> 
> #modprobe radeon # added by hybrid-video-ati-intel install script
> #echo IGD > /sys/kernel/debug/vgaswitcheroo/switch # added by
> hybrid-video-ati-intel install script
> echo OFF > /sys/kernel/debug/vgaswitcheroo/switch # completely deactivate
> radeon
> 
> ## ATi
> # Source: https://wiki.archlinux.org/index.php/ATI#Performance_tuning
> echo low > /sys/class/drm/card0/device/power_profile
> #echo profile > /sys/class/drm/card0/device/power_method
> echo dynpm > /sys/class/drm/card0/device/power_method
> echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
> 
> # CPUFREQ
> for i in 0 1 2 3; do cpufreq-set -c $i -g powersave; done  ## sets
> powersave cpufreq governor for all CPU cores
> #echo -n 90 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold
> echo -n 20 > /sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor
> 
> # Prepare the system for Wake-on-Lan
> /usr/sbin/ethtool -s eth0 wol pg
> 
> # Activate laptop_mode
> echo 5 > /proc/sys/vm/laptop_mode
> 
> # Performance tweaks for USB drivers under KDE SC
> echo madvise > /sys/kernel/mm/transparent_hugepage/enabled
> echo madvise > /sys/kernel/mm/transparent_hugepage/defrag
> echo 0 > /sys/kernel/mm/transparent_hugepage/khugepaged/defrag
> 
> 
> If this is the case, how do you guys would convert the FOR loop!?
> 

For ethtool, just create a separate service that executes that command.

Everything else you do is writing to /sys, so you can have one giant tmpfiles.d
file.

For the for loop:
w /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor - - - - powersave
w /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor - - - - powersave
w /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor - - - - powersave
w /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor - - - - powersave

Also, I don't think it's an error if the file doesn't exist, so you can just do
cpu0..cpu16 or whatever if you feel like.