image:ext4 set commit interval

Set commit interval of ext4 filesystems to 30s rather than the default
of 5s. Performance and device longevity will benefit.
Refs:
https://www.kernel.org/doc/Documentation/filesystems/ext4.txt

Author: learmj

image/gpt/ab_userdata/slot-post-process.sh

@@ -9,9 +9,9 @@ echo "pre-process $IMAGEMOUNTPATH for $COMP" 1>&2
 case $COMP in
    SYSTEM)
       cat << EOF > $IMAGEMOUNTPATH/etc/fstab
-/dev/disk/by-slot/active/system /              ext4 rw,relatime,errors=remount-ro 0 1
+/dev/disk/by-slot/active/system /              ext4 rw,relatime,errors=remount-ro,commit=30 0 1
 /dev/disk/by-slot/active/boot   /boot/firmware vfat defaults,rw,nofail  0 2
-LABEL=USERDATA                  /data          ext4 rw,relatime,nofail 0 2
+LABEL=USERDATA                  /data          ext4 rw,relatime,nofail,commit=30 0 2
 LABEL=BOOTFS                    /bootfs        vfat defaults,rw 0 2
 EOF
       ;;

image/mbr/simple_dual/setup-clear.sh

@@ -11,7 +11,7 @@ case $LABEL in
       case $IGconf_image_rootfs_type in
          ext4)
             cat << EOF > $IMAGEMOUNTPATH/etc/fstab
-UUID=${ROOTUUID} /               ext4 rw,relatime,errors=remount-ro 0 1
+UUID=${ROOTUUID} /               ext4 rw,relatime,errors=remount-ro,commit=30 0 1
 EOF
             ;;
          btrfs)

image/mbr/simple_dual/setup-crypt.sh

@@ -10,7 +10,7 @@ case $LABEL in
       case $IGconf_image_rootfs_type in
          ext4)
             cat << EOF > $IMAGEMOUNTPATH/etc/fstab
-/dev/mapper/cryptroot /               ext4 rw,relatime,errors=remount-ro 0 1
+/dev/mapper/cryptroot /               ext4 rw,relatime,errors=remount-ro,commit=30 0 1
 EOF
             ;;
          btrfs)