journal + mount tune

log2ram

@@ -52,8 +52,7 @@ wait_for () {
 
 createZramLogDrive () {
 	# Check Zram Class created
-	if [ ! -d "/sys/class/zram-control" ]; then
-		modprobe zram
+	if modprobe --first-time --verbose zram; then
 		RAM_DEV='0'
 	else
 		RAM_DEV=$(cat /sys/class/zram-control/hot_add)
@@ -61,7 +60,8 @@ createZramLogDrive () {
 	echo ${COMP_ALG} > /sys/block/zram${RAM_DEV}/comp_algorithm
 	echo ${LOG_DISK_SIZE} > /sys/block/zram${RAM_DEV}/disksize
 	echo ${SIZE} > /sys/block/zram${RAM_DEV}/mem_limit
-	mke2fs -t ext4 /dev/zram${RAM_DEV}
+	mke2fs -v -t ext4 -O ^has_journal -s 1024 -L log2ram$RAM_DEV /dev/zram${RAM_DEV}
+	tune2fs -o journal_data_writeback /dev/zram${RAM_DEV}
 }
 
 case "$1" in
@@ -70,25 +70,30 @@ case "$1" in
       mount --bind $RAM_LOG/ $HDD_LOG/
       mount --make-private $HDD_LOG/
       wait_for $HDD_LOG
-	if [ "$ZL2R" = true ]; then
+	  if [ "$ZL2R" = true ]; then
 		createZramLogDrive
-		mount -t ext4 -o nosuid,noexec,nodev,user=log2ram /dev/zram${RAM_DEV} ${RAM_LOG}/
-	else
+		mount -t ext4 -o nosuid,noexec,nodev,discard,user=log2ram /dev/zram${RAM_DEV} ${RAM_LOG}/
+	  else
 		mount -t tmpfs -o nosuid,noexec,nodev,mode=0755,size=${SIZE} log2ram $RAM_LOG/
-	fi
+	  fi
       wait_for $RAM_LOG
       syncFromDisk
       ;;
 
   stop)
       syncToDisk
-	#ZRAM_LOG=$(awk '$2 == "/var/log" {print $1}' /proc/mounts)
-	#ZRAM_LOG=$(echo ${ZRAM_LOG} | grep -o -E '[0-9]+')
       umount -l $RAM_LOG/
       umount -l $HDD_LOG/
-	# Unsure as even with Root permision denied
-	#echo ${ZRAM_LOG} > /sys/class/zram-control/hot_remove
-      ;;
+	  if [ "$ZL2R" = true ]; then
+		RAM_DEV=$(cat /sys/class/zram-control/hot_add)
+		if [ "$RAM_DEV" -eq "1" ];then
+			rmod zram
+		else
+			RAM_DEV=$(df /var/log | tail -1 | awk '{ print $1 }' | tr -dc '0-9')
+			echo "$RAM_DEV" > /sys/class/zram-control/hot_remove
+		fi
+	  fi
+	  ;;
 
   write)
       syncToDisk

log2ram.conf

@@ -5,7 +5,7 @@
 # If it's not enough, log2ram will not be able to use ram. Check you /var/log size folder.
 # The default is 40M and is basically enough for a lot of applications.
 # You will need to increase it if you have a server and a lot of log for example.
-SIZE=40M
+SIZE=20M
 
 # This variable can be set to true if you prefer "rsync" rather than "cp".
 # I use the command cp -u and rsync -X, so I don't copy the all folder every time for optimization.
@@ -19,7 +19,7 @@ MAIL=true
 # **************** Zram backing conf  *************************************************
 
 # ZL2R Zram Log 2 Ram enables a zram drive when ZL2R=true ZL2R=false is mem only tmpfs
-ZL2R=false
+ZL2R=true
 # COMP_ALG this is any compression algorithm listed in /proc/crypto
 # lz4 is fastest with lightest load but deflate (zlib) and Zstandard (zstd) give far better compression ratios
 # lzo is very close to lz4 and may with some binaries have better optimisation
@@ -29,5 +29,5 @@ COMP_ALG=lz4
 # LOG_DISK_SIZE is expected compression ratio of alg chosen multiplied by log SIZE
 # lzo/lz4=2.1:1 compression ratio zlib=2.7:1 zstandard=2.9:1
 # Really a guestimate of a bit bigger than compression ratio whilst minimising 0.1% mem usage of disk size
-LOG_DISK_SIZE=100M
+LOG_DISK_SIZE=60M