[MOD]EXT4 optimization UPDATE 8-7-11

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here is an init.d script to optimize your ext4 partitions


thanks to crackpot for the original script, all i did was change the values to optimize performance

this has been tested and does improve performance

go inside tar and extract s99 file put into init.d folder /system/etc/init.d

Originally Posted by dsexton702

because im not professional with kernels raver or drhonk will have to install this on the kernel, but for those who have ext4 on all partitions on GB this mod is definitely for you


"Barriers allow usage of delayed allocations without risk. Delayed allocations are the key to performance for modern filesystems," supercurio.

THIS IS FOR EXPERIENCED PEOPLE WITH ADB

plug the phone in
make sure debug is on
and type the following into your command prompt

adb shell
mount -o remount,barrier=0 /system /system
mount -o remount,barrier=0 /cache /cache

for some reason the kernel only has /data with barriers when all 3 should have them

you will notice your quad go up about 2-300 more
and your performance will be much better

the barriers were prob removed to the fact of such little actuall memory on the system and cache partition or they may be looking at shortning the sgs4g cache partition size and when they keis the gingerbread forgot to add the barrier back in. Also note when you barrier the cache you also run the risk of locking downloads to a set size hince why some had issues on frayo with download sizes larger then 30 mb in size also why u dont see that in gb or if you adb shell in frayo

/unmount cache

rmdir cache

mdir cache

then ln the 2 caache files back which removes the limit :P

Must we ADB this, or can we do this via terminal as well?

Originally Posted by Part Four

Must we ADB this, or can we do this via terminal as well?

i believe terminal is fine as well

Wow! Finally broke 3000!

Sent from my SGH-T959V using Tapatalk

Do we need to do this every (re)boot, or just once?

Thanks, amazing as always dsexton!

It will, but you will have to input out each time you reboot. Also...if you do use terminal to do it, you may need to put the commands in a note pad and copy /paste it. (holds down on the screen to get the paste function) it kept changing barriers to barrIers which is not valid .

Sent from my GS4G using XDA app.

there's an app called script manager, its free. just create new script, place code, save, set to root and to run at boot.

Originally Posted by shotchacokov

It will, but you will have to input out each time you reboot. Also...if you do use terminal to do it, you may need to put the commands in a note pad and copy /paste it. (holds down on the screen to get the paste function) it kept changing barriers to barrIers which is not valid .

Sent from my GS4G using XDA app.

ADB it is then!

Originally Posted by Somairotevoli

Wow! Finally broke 3000!

Sent from my SGH-T959V using Tapatalk

were you OC'd or stock? also, did you cook that battery mod? and are you on the kg4 or kg6 rom?