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Make SWAP_ALGORITHM also configurable with zram swap

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This commit is contained in:
ThomasKaiser 2018-09-06 01:36:18 -07:00
parent 4804c91114
commit e0d8b11ade
2 changed files with 16 additions and 7 deletions
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14
packages/bsp/common/etc/default/armbian-zram-config.dpkg-dist
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@ -2,6 +2,14 @@
#
# enable the armbian-zram-config service?
ENABLED=true
#
# size of the partition for ramlog in megabytes
SIZE=50
# percentage of zram usage compared to physically available DRAM.
# Huge overcommitment (300) is possible and sometimes desirable. See
# https://forum.armbian.com/topic/5565-zram-vs-swap/?do=findComment&comment=61082
# ZRAM_PERCENTAGE=50
# create how many zram devices max for swap
# ZRAM_MAX_DEVICES=4
# Which algorithm to choose for zram based swapping
# SWAP_ALGORITHM=lz4

9
packages/bsp/common/usr/lib/armbian/armbian-zram-config
View File

@ -16,7 +16,7 @@
# and script configuration
. /usr/lib/armbian/armbian-common
# ZRAM_PERCENTAGE and ZRAM_MAX_DEVICES can be defined in /etc/default/armbian-zram-config
# ZRAM_PERCENTAGE, ZRAM_MAX_DEVICES and SWAP_ALGORITHM can be defined there:
[ -f /etc/default/armbian-zram-config ] && . /etc/default/armbian-zram-config
activate_zram() {
@ -38,8 +38,9 @@ activate_zram() {
memory_total=$(awk '{printf("%d",$2*1024)}' <<<${mem_info})
mem_per_zram_device=$(( ${memory_total} / ${zram_devices} * ${zram_percent} / 100 ))
swap_algo=${SWAP_ALGORITHM:=lz4}
for (( i=1; i<=zram_devices; i++ )); do
[[ -f /sys/block/zram${i}/comp_algorithm ]] && echo lz4 >/sys/block/zram${i}/comp_algorithm 2>/dev/null
[[ -f /sys/block/zram${i}/comp_algorithm ]] && echo ${swap_algo} >/sys/block/zram${i}/comp_algorithm 2>/dev/null
echo -n ${mem_per_zram_device} > /sys/block/zram${i}/disksize
mkswap /dev/zram${i}
swapon -p 5 /dev/zram${i}
@ -53,9 +54,9 @@ activate_zram() {
done
echo -n $(($SIZE*1024*1024)) > /sys/block/zram0/disksize
# if it fails, select lz4. Workaround for some older kernels
# if it fails, select $swap_algo. Workaround for some older kernels
if [[ $? == 1 ]]; then
echo lz4 > /sys/block/zram0/comp_algorithm 2>/dev/null
echo ${swap_algo} > /sys/block/zram0/comp_algorithm 2>/dev/null
echo -n $(($SIZE*1024*1024)) > /sys/block/zram0/disksize
fi