android_device_samsung_msm8.../rootdir/bin/init.qcom.post_boot.sh

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#! /vendor/bin/sh
# Copyright (c) 2012-2013, 2016-2018, The Linux Foundation. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of The Linux Foundation nor
# the names of its contributors may be used to endorse or promote
# products derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Function from LineageOS/android_device_oneplus_oneplus3
function configure_zram_parameters() {
MemTotalStr=`cat /proc/meminfo | grep MemTotal`
MemTotal=${MemTotalStr:16:8}
low_ram=`getprop ro.config.low_ram`
# Zram disk - 75% for Go devices.
# For 512MB Go device, size = 384MB, set same for Non-Go.
# For 1GB Go device, size = 768MB, set same for Non-Go.
# For 2GB Go device, size = 1536MB, set same for Non-Go.
# For >2GB Non-Go devices, size = 50% of RAM size. Limit the size to 4GB.
# And enable lz4 zram compression for Go targets.
let RamSizeGB="( $MemTotal / 1048576 ) + 1"
diskSizeUnit=M
if [ $RamSizeGB -le 2 ]; then
let zRamSizeMB="( $RamSizeGB * 1024 ) * 3 / 4"
else
let zRamSizeMB="( $RamSizeGB * 1024 ) / 2"
fi
# use MB avoid 32 bit overflow
if [ $zRamSizeMB -gt 4096 ]; then
let zRamSizeMB=4096
fi
if [ "$low_ram" == "true" ]; then
echo lz4 > /sys/block/zram0/comp_algorithm
fi
if [ -f /sys/block/zram0/disksize ]; then
if [ -f /sys/block/zram0/use_dedup ]; then
echo 1 > /sys/block/zram0/use_dedup
fi
echo "$zRamSizeMB""$diskSizeUnit" > /sys/block/zram0/disksize
# ZRAM may use more memory than it saves if SLAB_STORE_USER
# debug option is enabled.
if [ -e /sys/kernel/slab/zs_handle ]; then
echo 0 > /sys/kernel/slab/zs_handle/store_user
fi
if [ -e /sys/kernel/slab/zspage ]; then
echo 0 > /sys/kernel/slab/zspage/store_user
fi
mkswap /dev/block/zram0
swapon /dev/block/zram0 -p 32758
fi
}
# Let kernel know our image version/variant/crm_version
if [ -f /sys/devices/soc0/select_image ]; then
image_version="10:"
image_version+=`getprop ro.build.id`
image_version+=":"
image_version+=`getprop ro.build.version.incremental`
image_variant=`getprop ro.product.name`
image_variant+="-"
image_variant+=`getprop ro.build.type`
oem_version=`getprop ro.build.version.codename`
echo 10 > /sys/devices/soc0/select_image
echo $image_version > /sys/devices/soc0/image_version
echo $image_variant > /sys/devices/soc0/image_variant
echo $oem_version > /sys/devices/soc0/image_crm_version
fi
# Change console log level as per console config property
console_config=`getprop persist.console.silent.config`
case "$console_config" in
"1")
echo "Enable console config to $console_config"
echo 0 > /proc/sys/kernel/printk
;;
*)
echo "Enable console config to $console_config"
;;
esac
# Enable ZRAM
configure_zram_parameters