[oe] [PATCH] zram: Integrate an init script

[Andrei Gherzan]

git send-email with --subject-prefix won't overwrite the subject. As well
"man" says nothing about that flag. So i will resend with
format-patch --subject-prefix... Probably this should be changed in README
as well?

ag

On Tue, Sep 18, 2012 at 6:21 PM, Andrei Gherzan <andrei at gherzan.ro> wrote:

> Signed-off-by: Andrei Gherzan <andrei at gherzan.ro>
> ---
>  meta-oe/recipes-extended/zram/zram/init   |   85
> +++++++++++++++++++++++++++++
>  meta-oe/recipes-extended/zram/zram_0.1.bb |   23 ++++++++
>  2 files changed, 108 insertions(+)
>  create mode 100644 meta-oe/recipes-extended/zram/zram/init
>  create mode 100644 meta-oe/recipes-extended/zram/zram_0.1.bb
>
> diff --git a/meta-oe/recipes-extended/zram/zram/init
> b/meta-oe/recipes-extended/zram/zram/init
> new file mode 100644
> index 0000000..d126169
> --- /dev/null
> +++ b/meta-oe/recipes-extended/zram/zram/init
> @@ -0,0 +1,85 @@
> +#!/bin/bash
> +### BEGIN INIT INFO
> +# Provides: zram
> +# Required-Start:
> +# Required-Stop:
> +# Default-Start: 2 3 4 5
> +# Default-Stop: 0 1 6
> +# Short-Description: Increased Performance In Linux With zRam (Virtual
> Swap Compressed in RAM)
> +# Description: Adapted from systemd scripts at
> https://github.com/mystilleef/FedoraZram
> +# Included as part of antix-goodies package by anticapitalista <
> antiX at operamail.com>
> +# This script was written by tradetaxfree and is found at
> http://crunchbanglinux.org/forums/topic/15344/zram-a-good-idea/
> +# Copy this script (as root) from /usr/local/bin to /etc/init.d and then
> #update-rc.d zram defaults
> +# After booting verify the module is loaded with: lsmod | grep zram
> +### END INIT INFO
> +set -e
> +
> +start() {
> +    # get the number of CPUs
> +    num_cpus=$(grep -c processor /proc/cpuinfo)
> +    # if something goes wrong, assume we have 1
> +    [ "$num_cpus" != 0 ] || num_cpus=1
> +
> +    # set decremented number of CPUs
> +    last_cpu=$((num_cpus - 1))
> +
> +    #default Factor % = 90 change this value here or create
> /etc/default/zram
> +    FACTOR=90
> +    #& put the above single line in /etc/default/zram with the value you
> want
> +    [ -f /etc/default/zram ] && source /etc/default/zram || true
> +    factor=$FACTOR # percentage
> +
> +    # get the amount of memory in the machine
> +    memtotal=$(grep MemTotal /proc/meminfo | awk ' { print $2 } ')
> +    mem_by_cpu=$(($memtotal/$num_cpus*$factor/100*1024))
> +
> +    # load dependency modules
> +    modprobe zram zram_num_devices=$num_cpus
> +    echo "zram devices probed successfully"
> +
> +    # initialize the devices
> +    for i in $(seq 0 $last_cpu); do
> +       echo 1 > /sys/block/zram$i/reset
> +       echo $mem_by_cpu > /sys/block/zram$i/disksize
> +       # Creating swap filesystems
> +       mkswap /dev/zram$i
> +       # Switch the swaps on
> +       swapon -p 100 /dev/zram$i
> +    done
> +}
> +
> +stop() {
> +    # get the number of CPUs
> +    num_cpus=$(grep -c processor /proc/cpuinfo)
> +
> +    # set decremented number of CPUs
> +    last_cpu=$((num_cpus - 1))
> +
> +    # Switching off swap
> +    for i in $(seq 0 $last_cpu); do
> +       if [ "$(grep /dev/zram$i /proc/swaps)" != "" ]; then
> +               swapoff /dev/zram$i
> +               sleep 1
> +       fi
> +    done
> +    sleep 1
> +    rmmod zram
> +}
> +
> +case "$1" in
> +    start)
> +        start
> +        ;;
> +    stop)
> +        stop
> +        ;;
> +    restart)
> +        stop
> +        sleep 3
> +        start
> +        ;;
> +    *)
> +        echo "Usage: $0 {start|stop|restart}"
> +        RETVAL=1
> +esac
> +exit $RETVAL
> diff --git a/meta-oe/recipes-extended/zram/zram_0.1.bbb/meta-oe/recipes-extended/zram/
> zram_0.1.bb
> new file mode 100644
> index 0000000..8526264
> --- /dev/null
> +++ b/meta-oe/recipes-extended/zram/zram_0.1.bb
> @@ -0,0 +1,23 @@
> +DESCRIPTION = "Linux zram compressed in-memory swap"
> +LICENSE = "MIT"
> +LIC_FILES_CHKSUM =
> "file://${COREBASE}/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58"
> +
> +inherit allarch update-rc.d
> +
> +RDEPENDS_${PN} = "util-linux-swaponoff kmod kernel-module-zram"
> +
> +PR = "r0"
> +
> +SRC_URI = " \
> +           file://init \
> +          "
> +
> +do_install () {
> +       # Sysvinit
> +       install -d ${D}${sysconfdir}/init.d
> +       install -m 0755 ${WORKDIR}/init ${D}${sysconfdir}/init.d/zram
> +}
> +
> +FILES_${PN} = "${sysconfdir}/init.d"
> +INITSCRIPT_NAME = "zram"
> +INITSCRIPT_PARAMS = "start 05 2 3 4 5 . stop 22 0 1 6 ."
> --
> 1.7.9.5
>
>