Add volatile-log boot parameter for mounting /var/log as tmpfs

init-volatile-log.patch

commit 8f43fd71173f6da79b5029343e35285c8800a1de
Author: Penk Chen <[email protected]>
Date:   Fri Dec 16 11:47:03 2016 +0000

    Add volatile-log boot param

diff --git a/init b/init
index 43f1571..bb7f995 100755
--- a/init
+++ b/init
@@ -61,6 +61,7 @@ export fastboot=n
 export forcefsck=n
 export fsckfix=
 export recovery=
+export volatile=
 
 
 # mdadm needs hostname to be set. This has to be done before the udev rules are called!
@@ -164,6 +165,9 @@ for x in $(cat /proc/cmdline); do
 	rw)
 		readonly=n
 		;;
+	volatile-log)
+	        volatile=y
+                ;;
 	debug)
 		debug=y
 		quiet=n
@@ -330,6 +334,13 @@ unset fastboot
 unset forcefsck
 unset fsckfix
 
+# To reduce log writing
+if [ "$volatile" == "y" ]; then
+    mkdir -p /var/log
+    mount -t tmpfs -o "noexec,nosuid,size=10%,mode=0755" tmpfs /var/log
+    mount -n -o move /var/log ${rootmnt}/var/log
+fi
+
 # Move virtual filesystems over to the real filesystem
 mount -n -o move /sys ${rootmnt}/sys
 mount -n -o move /proc ${rootmnt}/proc