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- #=============================================================================
- # Copyright (c) 2019-2022 Qualcomm Technologies, Inc.
- # All Rights Reserved.
- # Confidential and Proprietary - Qualcomm Technologies, Inc.
- #
- # Copyright (c) 2009-2012, 2014-2019, 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 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 and < 2GB devices .
- # 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
- }
- function configure_read_ahead_kb_values() {
- MemTotalStr=`cat /proc/meminfo | grep MemTotal`
- MemTotal=${MemTotalStr:16:8}
- dmpts=$(ls /sys/block/*/queue/read_ahead_kb | grep -e dm -e mmc -e sd)
- # dmpts holds below read_ahead_kb nodes if exists:
- # /sys/block/dm-0/queue/read_ahead_kb to /sys/block/dm-10/queue/read_ahead_kb
- # /sys/block/sda/queue/read_ahead_kb to /sys/block/sdh/queue/read_ahead_kb
- # Set 128 for <= 4GB &
- # set 512 for >= 5GB targets.
- if [ $MemTotal -le 4194304 ]; then
- ra_kb=128
- else
- ra_kb=512
- fi
- if [ -f /sys/block/mmcblk0/bdi/read_ahead_kb ]; then
- echo $ra_kb > /sys/block/mmcblk0/bdi/read_ahead_kb
- fi
- if [ -f /sys/block/mmcblk0rpmb/bdi/read_ahead_kb ]; then
- echo $ra_kb > /sys/block/mmcblk0rpmb/bdi/read_ahead_kb
- fi
- for dm in $dmpts; do
- if [ `cat $(dirname $dm)/../removable` -eq 0 ]; then
- echo $ra_kb > $dm
- fi
- done
- }
- function configure_memory_parameters() {
- # Set Memory parameters.
- #
- # Set per_process_reclaim tuning parameters
- # All targets will use vmpressure range 50-70,
- # All targets will use 512 pages swap size.
- #
- # Set Low memory killer minfree parameters
- # 32 bit Non-Go, all memory configurations will use 15K series
- # 32 bit Go, all memory configurations will use uLMK + Memcg
- # 64 bit will use Google default LMK series.
- #
- # Set ALMK parameters (usually above the highest minfree values)
- # vmpressure_file_min threshold is always set slightly higher
- # than LMK minfree's last bin value for all targets. It is calculated as
- # vmpressure_file_min = (last bin - second last bin ) + last bin
- #
- # Set allocstall_threshold to 0 for all targets.
- #
- configure_zram_parameters
- configure_read_ahead_kb_values
- echo 100 > /proc/sys/vm/swappiness
- # Disable periodic kcompactd wakeups. We do not use THP, so having many
- # huge pages is not as necessary.
- echo 0 > /proc/sys/vm/compaction_proactiveness
- # With THP enabled, the kernel greatly increases min_free_kbytes over its
- # default value. Disable THP to prevent resetting of min_free_kbytes
- # value during online/offline pages.
- if [ -f /sys/kernel/mm/transparent_hugepage/enabled ]; then
- echo never > /sys/kernel/mm/transparent_hugepage/enabled
- fi
- MemTotalStr=`cat /proc/meminfo | grep MemTotal`
- MemTotal=${MemTotalStr:16:8}
- let RamSizeGB="( $MemTotal / 1048576 ) + 1"
- # Set the min_free_kbytes to standard kernel value
- if [ $RamSizeGB -ge 8 ]; then
- echo 11584 > /proc/sys/vm/min_free_kbytes
- elif [ $RamSizeGB -ge 4 ]; then
- echo 8192 > /proc/sys/vm/min_free_kbytes
- elif [ $RamSizeGB -ge 2 ]; then
- echo 5792 > /proc/sys/vm/min_free_kbytes
- else
- echo 4096 > /proc/sys/vm/min_free_kbytes
- fi
- }
- configure_memory_parameters
- if [ -f /sys/devices/soc0/chip_family ]; then
- chipfamily=`cat /sys/devices/soc0/chip_family`
- fi
- case "$chipfamily" in
- "0x74")
- /vendor/bin/sh /vendor/bin/init.kernel.post_boot-taro.sh
- ;;
- "0x7B"|"0x7b")
- /vendor/bin/sh /vendor/bin/init.kernel.post_boot-diwali.sh
- ;;
- "0x82")
- /vendor/bin/sh /vendor/bin/init.kernel.post_boot-cape.sh
- ;;
- *)
- echo "***WARNING***: Invalid chip family\n\t No postboot settings applied!!\n"
- ;;
- esac
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