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Prepare zram compressed /tmp

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Will only be active when /tmp entry is removed from /etc/fstab.
This commit is contained in:
ThomasKaiser 2018-09-06 23:08:02 +02:00
parent c24ceea4b1
commit 098a391996
2 changed files with 34 additions and 5 deletions
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6
packages/bsp/common/etc/default/armbian-zram-config.dpkg-dist
View File

@ -13,3 +13,9 @@ ENABLED=true
# Which algorithm to choose for zram based swapping
# SWAP_ALGORITHM=lz4
# Which algorithm to choose for zram based ramlog partition
# RAMLOG_ALGORITHM=zstd
# Which algorithm to choose for zram based /tmp
# TMP_ALGORITHM=lz4hc

33
packages/bsp/common/usr/lib/armbian/armbian-zram-config
View File

@ -10,6 +10,7 @@
#
# activate_zram_swap
# activate_ramlog_partition
# activate_compressed_tmp
# Read in basic OS image information
@ -17,7 +18,8 @@
# and script configuration
. /usr/lib/armbian/armbian-common
# ZRAM_PERCENTAGE, ZRAM_MAX_DEVICES, SWAP_ALGORITHM and RAMLOG_ALGORITHM can be defined:
# It's possible to override ZRAM_PERCENTAGE, ZRAM_MAX_DEVICES, SWAP_ALGORITHM,
# RAMLOG_ALGORITHM and TMP_ALGORITHM here:
[ -f /etc/default/armbian-zram-config ] && . /etc/default/armbian-zram-config
activate_zram_swap() {
@ -31,7 +33,7 @@ activate_zram_swap() {
cpu_cores=$(grep -c '^processor' /proc/cpuinfo | sed 's/^0$/1/')
[[ ${cpu_cores} -gt ${zram_max_devs} ]] && zram_devices=${zram_max_devs} || zram_devices=${cpu_cores}
module_args="$(modinfo zram | awk -F" " '/num_devices/ {print $2}' | cut -f1 -d:)"
[[ -n ${module_args} ]] && modprobe zram ${module_args}=$(( ${zram_devices} + 1 )) || return
[[ -n ${module_args} ]] && modprobe zram ${module_args}=$(( ${zram_devices} + 2 )) || return
# Use 50% of real memory by default
zram_percent=${ZRAM_PERCENTAGE:=50}
@ -62,12 +64,12 @@ activate_ramlog_partition() {
# choose RAMLOG_ALGORITHM if defined in /etc/default/armbian-zram-config
# otherwise try to choose most efficient compression scheme available.
# See https://patchwork.kernel.org/patch/9918897/
if [ -n ${RAMLOG_ALGORITHM} ]; then
echo ${RAMLOG_ALGORITHM} >/sys/block/zram0/comp_algorithm 2>/dev/null
else
if [ "X${RAMLOG_ALGORITHM}" = "X" ]; then
for algo in lz4 lz4hc quicklz zlib brotli zstd ; do
echo ${algo} >/sys/block/zram0/comp_algorithm 2>/dev/null
done
else
echo ${RAMLOG_ALGORITHM} >/sys/block/zram0/comp_algorithm 2>/dev/null
fi
echo -n ${disksize} > /sys/block/zram0/disksize
@ -82,9 +84,30 @@ activate_ramlog_partition() {
echo -e "### Activated Armbian ramlog partition with ${algo} compression" >>${Log}
} # activate_ramlog_partition
activate_compressed_tmp() {
# create /tmp not as tmpfs but zram compressed if no fstab entry exists
grep -q '/tmp' /etc/fstab && return
tmp_device=$(( ${zram_devices} + 1 ))
if [[ -f /sys/block/zram${tmp_device}/comp_algorithm ]]; then
if [ "X${TMP_ALGORITHM}" = "X" ]; then
echo ${swap_algo} >/sys/block/zram${tmp_device}/comp_algorithm 2>/dev/null
else
echo ${TMP_ALGORITHM} >/sys/block/zram${tmp_device}/comp_algorithm 2>/dev/null
fi
fi
echo -n $(( ${memory_total} / 2 )) > /sys/block/zram${tmp_device}/disksize
mkfs.ext4 -O ^has_journal -s 1024 -L tmp /dev/zram${tmp_device}
mount -o nosuid /dev/zram${tmp_device} /tmp
chmod 777 /tmp
algo=$(sed 's/.*\[\([^]]*\)\].*/\1/g' </sys/block/zram${tmp_device}/comp_algorithm)
echo -e "\n### Activated ${algo} compressed /tmp" >>${Log}
} # activate_compressed_tmp
case $1 in
*start*)
activate_zram_swap
activate_ramlog_partition
activate_compressed_tmp
;;
esac