Try to implement persistent XDG_CACHE behaviour

config/chromium.conf

@@ -6,7 +6,7 @@ CHROMIUM_FLAGS="\
 --disable-smooth-scrolling \
 --disable-low-res-tiling \
 --enable-low-end-device-mode \
---num-raster-threads=4 \
+--num-raster-threads=2 \
 --profiler-timing=0 \
 --disable-composited-antialiasing \
---disk-cache-size=300000000
+--disk-cache-size=100000000"

desktop.sh

@@ -25,7 +25,7 @@ install_desktop ()
 
 		# install optimized chromium configuration
 		cp $SRC/lib/config/chromium.conf $CACHEDIR/$SDCARD/etc/chromium-browser/default
-		echo "export XDG_CACHE_HOME=\"/var/log/.cache\"" > $CACHEDIR/$SDCARD/etc/chromium-browser/customizations/10-cachedir
+		echo "export XDG_CACHE_HOME=\"/var/xdgcache\"" > $CACHEDIR/$SDCARD/etc/chromium-browser/customizations/10-cachedir
 	fi
 	# install dedicated startup icons
 	cp $SRC/lib/bin/icons/${RELEASE}.png $CACHEDIR/$SDCARD/usr/share/pixmaps

distributions.sh

@@ -138,7 +138,7 @@ install_common()
 	install -m 644 $SRC/lib/scripts/firstrun.service $CACHEDIR/$SDCARD/etc/systemd/system/
 
 	# enable additional services
-	chroot $CACHEDIR/$SDCARD /bin/bash -c "systemctl --no-reload enable firstrun.service resize2fs.service armhwinfo.service log2ram.service >/dev/null 2>&1"
+	chroot $CACHEDIR/$SDCARD /bin/bash -c "systemctl --no-reload enable firstrun.service resize2fs.service armhwinfo.service log2ram.service xdgcache2ram.service >/dev/null 2>&1"
 
 	# copy "first run automated config, optional user configured"
  	cp $SRC/lib/config/armbian_first_run.txt $CACHEDIR/$SDCARD/boot/armbian_first_run.txt

makeboarddeb.sh

@@ -67,7 +67,7 @@ create_board_package()
 	#!/bin/sh
 	[ remove = "\$1" ] || [ abort-install = "\$1" ] && dpkg-divert --package linux-${RELEASE}-root-${DEB_BRANCH}${BOARD} --remove --rename \
 		--divert /etc/mpv/mpv-dist.conf /etc/mpv/mpv.conf
-	systemctl disable log2ram.service armhwinfo.service >/dev/null 2>&1
+	systemctl disable log2ram.service xdgcache2ram.service armhwinfo.service >/dev/null 2>&1
 	exit 0
 	EOF
 
@@ -88,6 +88,12 @@ create_board_package()
 	if [ -f "/etc/systemd/system/log2ram.service" ]; then
 		mv /etc/systemd/system/log2ram.service /etc/systemd/system/log2ram-service.dpkg-old
 	fi
+	if [ ! -f "/etc/default/xdgcache2ram" ]; then
+		cp /etc/default/xdgcache2ram.dpkg-dist /etc/default/xdgcache2ram
+	fi
+	if [ -f "/etc/systemd/system/xdgcache2ram.service" ]; then
+		mv /etc/systemd/system/xdgcache2ram.service /etc/systemd/system/xdgcache2ram-service.dpkg-old
+	fi
 	exit 0
 	EOF
 
@@ -286,6 +292,11 @@ create_board_package()
 	install -m 755 $SRC/lib/scripts/log2ram/log2ram.hourly $destination/etc/cron.daily/log2ram
 	cp $SRC/lib/scripts/log2ram/log2ram.default $destination/etc/default/log2ram.dpkg-dist
 
+	# xdgcache2ram - persistent xdgcache based on log2ram
+	cp $SRC/lib/scripts/log2ram/xdgcache2ram.service $destination/lib/systemd/system/xdgcache2ram.service
+	ln -s /usr/sbin/log2ram $destination/usr/sbin/xdgcache2ram
+	cp $SRC/lib/scripts/log2ram/xdgcache2ram.default $destination/etc/default/xdgcache2ram.dpkg-dist
+
 	if [[ $LINUXFAMILY == sun*i ]]; then
 		install -m 755 $SRC/lib/scripts/armbian-add-overlay $destination/usr/sbin
 		if [[ $BRANCH == default ]]; then

scripts/armhwinfo

@@ -316,7 +316,7 @@ adjust_chromium_settings() {
 	if [ -f /etc/chromium-browser/default ]; then
 
 		# create chromium cache directory
-		[[ ! -d /var/log/.cache ]] && mkdir /var/log/.cache && chgrp netdev /var/log/.cache && chmod g+w /var/log/.cache
+		[[ ! -d /var/xdgcache ]] && mkdir -m775 /var/xdgcache && chgrp netdev /var/xdgcache && chmod g+w /var/xdgcache
 
 		# Desktop image. Let's adjust chromium cache size depending on available DRAM (15%)
 		# and count of render threads based on number of CPU cores
@@ -324,13 +324,13 @@ adjust_chromium_settings() {
 		memory_total=$(awk '{printf("%d",$2/1024)}' <<<${mem_info})
 		cpu_cores=$(grep -c processor /proc/cpuinfo)
 		chromium_disk_cache=$(( ${memory_total} * 158000 ))
-		log2ram_size=$(( 50 + $(( ${memory_total} / 1000 * 150 )) ))
+		xdgcache_size=$(( ${memory_total} / 1000 * 150 ))
 
-		# adjust log2ram config if necessary (switching between devices with different amount
+		# adjust xdgcache config if necessary (switching between devices with different amount
 		# of DRAM but same OS image)
-		grep -q "^SIZE=${log2ram_size}M" /etc/default/log2ram || \
-			sed -i "s/^SIZE=.*/SIZE=${log2ram_size}M/" /etc/default/log2ram && \
-			systemctl restart log2ram
+		grep -q "^SIZE=${xdgcache_size}M" /etc/default/log2ram || \
+			sed -i -e "s/^SIZE=.*/SIZE=${xdgcache_size}M/" -e "s/^ENABLED=.*/ENABLED=true/" \
+			/etc/default/xdgcache2ram && systemctl restart xdgcache2ram
 
 		# adjust chromium settings
 		sed -i -e "s/disk-cache-size=.*/disk-cache-size=${chromium_disk_cache}/" \

scripts/log2ram/log2ram

@@ -1,22 +1,24 @@
 #!/bin/sh
 
-# Source: https://github.com/azlux/log2ram
+# Source based on: https://github.com/azlux/log2ram
 # License: MIT
 # License file: /usr/share/log2ram/LICENSE
 
 SIZE=40M
 USE_RSYNC=false
 ENABLED=false
+ME="${0##*/}"
+DIRNAME="$(sed 's/2ram$//' <<<"${ME}")"
 
-[ -f /etc/default/log2ram ] && . /etc/default/log2ram
+[ -f /etc/default/${ME} ] && . /etc/default/${ME}
 
 [ "$ENABLED" != true ] && exit 0
 
 # don't touch anything below here.
 
-HDD_LOG=/var/log.hdd/
-RAM_LOG=/var/log/
-LOG2RAM_LOG="${HDD_LOG}log2ram.log"
+HDD_LOG=/var/${DIRNAME}.hdd/
+RAM_LOG=/var/${DIRNAME}/
+LOG2RAM_LOG="${HDD_LOG}${ME}.log"
 LOG_OUTPUT="tee -a $LOG2RAM_LOG"
 
 isSafe () {
@@ -28,7 +30,7 @@ syncToDisk () {
     isSafe
 
     if [ "$USE_RSYNC" = true ]; then
-        rsync -aXWv --delete --exclude log2ram.log --links $RAM_LOG $HDD_LOG 2>&1 | $LOG_OUTPUT
+        rsync -aXWv --delete --exclude ${ME}.log --links $RAM_LOG $HDD_LOG 2>&1 | $LOG_OUTPUT
     else
         cp -rfup $RAM_LOG -T $HDD_LOG 2>&1 | $LOG_OUTPUT
     fi
@@ -38,7 +40,7 @@ syncFromDisk () {
     isSafe
 
     if [ "$USE_RSYNC" = true ]; then
-        rsync -aXWv --delete --exclude log2ram.log --links $HDD_LOG $RAM_LOG 2>&1 | $LOG_OUTPUT
+        rsync -aXWv --delete --exclude ${ME}.log --links $HDD_LOG $RAM_LOG 2>&1 | $LOG_OUTPUT
     else
         cp -rfup $HDD_LOG -T $RAM_LOG 2>&1 | $LOG_OUTPUT
     fi
@@ -51,7 +53,7 @@ case "$1" in
       rm -f $LOG2RAM_LOG
       mount --bind $RAM_LOG $HDD_LOG
       mount --make-private $HDD_LOG
-      mount -t tmpfs -o nosuid,noexec,nodev,mode=0755,size=$SIZE log2ram $RAM_LOG
+      mount -t tmpfs -o nosuid,noexec,nodev,mode=0755,size=$SIZE ${ME} $RAM_LOG
       syncFromDisk
       ;;
 
@@ -65,7 +67,7 @@ case "$1" in
       syncToDisk
       ;;
   *)
-      echo "Usage: log2ram {start|stop|write}" >&2
+      echo "Usage: ${ME} {start|stop|write}" >&2
       exit 1
       ;;
 esac

scripts/log2ram/xdgcache2ram.default

@@ -0,0 +1,13 @@
+# configuration values for the log2ram service
+#
+# enable the log2ram service?
+ENABLED=false
+#
+# size of the tmpfs mount
+SIZE=1M
+#
+# use rsync instead of cp -r
+# requires rsync installed, may provide better performance
+# due to copying only new and changed files
+USE_RSYNC=true
+#

scripts/log2ram/xdgcache2ram.service

@@ -0,0 +1,18 @@
+[Unit]
+Description=Armbian enhanced xdgcache based on Log2Ram
+DefaultDependencies=no
+Before=rsyslog.service syslog.target systemd-journald.service sysinit.target shutdown.target
+After=local-fs.target
+Conflicts=shutdown.target
+RequiresMountsFor=/var/xdgcache /var/xdgcache.hdd
+IgnoreOnIsolate=yes
+
+[Service]
+Type=oneshot
+ExecStart=/usr/sbin/xdgcache2ram start
+ExecStop=/usr/sbin/xdgcache2ram stop
+ExecReload=/usr/sbin/xdgcache2ram write
+RemainAfterExit=yes
+
+[Install]
+WantedBy=sysinit.target