Default [MOD][ANY][Mitsuyoshi EXT4 Mod][flo]

This is the flo version of my mod for the old nexus 7 here http://forum.xda-developers.com/show....php?t=2280496

Repeating the intro to save you guys going there

Background..

With any linux system i build first thing i do is remove the journal from all my EXT4 partitions, to make a long story short ( i wont bore you with details of just how journal writes totally slow disk i/o , google it ) this gave me on average a 25% increase in system speed ( obviously due to the increased i/o rate )

I usually did it with

Code:
mke2fs.ext4 -O ^has_journal ...device...
before installing the distro, now i thought hey maybe this would work on android?

Now mke2fs is not well supported on arm but tune2fs is! in fact its included in TWRP 2.5 so


Code:
run_program("/sbin/tune2fs", "-O", "^has_journal", "/dev/block/platform/msm_sdcc.1/by-name/system");
( for the system partition) should work right , and in fact yes it does !!!, tried it from TWRP command line and hey presto %^$%^$^%$ FAST system

This is the code for a recovery script version

Code:
ui_print("jubei.....remove journals from all ext4 partitions");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/boot       /boot       emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/recovery   /recovery   emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/misc       /misc       emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/system     /system     ext4");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/userdata   /data       ext4");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/cache      /cache      ext4");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/sbl1       /sbl1       emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/sbl2       /sbl2       emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/sbl3       /sbl3       emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/tz         /tz         emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/rpm        /rpm        emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/aboot      /aboot      emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/sbl2b      /sbl2b      emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/sbl3b      /sbl3b      emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/tzb        /tzb        emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/rpmb       /rpmb       emmc");
ui_print("/dev/block/platform/msm_sdcc.1/by-name/abootb     /abootb     emmc");
ui_print("");
ui_print("");
ifelse(is_mounted("/system") == "/system", unmount("/system"));
ifelse(is_mounted("/cache") == "/cache", unmount("/cache"));
ifelse(is_mounted("/data") == "/data", unmount("/data"));
ui_print("converting partitions to ext4 minus journal");
ui_print(" ");
ui_print("e2fsck system partition");
ui_print(" ");
run_program("/sbin/e2fsck", "-p", "/dev/block/platform/msm_sdcc.1/by-name/system");
ui_print("e2fsck data partition");
ui_print(" ");
run_program("/sbin/e2fsck", "-p", "/dev/block/platform/msm_sdcc.1/by-name/userdata");
ui_print("e2fsck cache partition");
ui_print(" ");
run_program("/sbin/e2fsck", "-p", "/dev/block/platform/msm_sdcc.1/by-name/cache");
ui_print("now lets rub out those nasty journals");
ui_print(" ");
run_program("/sbin/tune2fs", "-O", "^has_journal", "/dev/block/platform/msm_sdcc.1/by-name/userdata");
run_program("/sbin/tune2fs", "-O", "^has_journal", "/dev/block/platform/msm_sdcc.1/by-name/system");
run_program("/sbin/tune2fs", "-O", "^has_journal", "/dev/block/platform/msm_sdcc.1/by-name/cache");
ui_print("and re-fsck to clean any set bits");
ui_print(" ");
ui_print("e2fsck system partition");
ui_print(" ");
run_program("/sbin/e2fsck", "-p", "/dev/block/platform/msm_sdcc.1/by-name/system");
ui_print("e2fsck cache partition");
ui_print(" ");
run_program("/sbin/e2fsck", "-p", "/dev/block/platform/msm_sdcc.1/by-name/userdata");
ui_print("e2fsck cache partition");
ui_print(" ");
run_program("/sbin/e2fsck", "-p", "/dev/block/platform/msm_sdcc.1/by-name/cache");
ui_print("end of jubei mod ");
And i include a zip for those who like to test

there are 2 scripts, one to remove the journal from your ext4 partitions, and one to re-instate the journal, this should allow people to test their setup with each without any wiping or reformatting

Instructions.......
( tested with TWRP 2.5+ only )
Flash the bugger
DO NOT WIPE ANYTHING, after flashing, doing so will only reformat the wiped partition with a journal

There will be one update that includes a test routine to ensure journals have been erased
I am now able to extend the mod to any device that uses twrp 2.5+ and ext4, plese ask for a particular device on this thread
Thank you
Edit Please note non flo versions are not tested by me.
Edit mako version added after request
Edit hammerhead version added after request