Dear sir,
Can you make oc kernel to the bootloader that still uses hc..
I'm using your kernel oc, but stuck on acer logo at boot time ...

thx in advance

Update to ics bootloader.....no reason not too.

Sent from my SCH-R760 using XDA

Dmesg

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Here's the Dmesg files you were looking for.

Thanks!!!

MD

DiskIO enhancement

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A significant increase in diskIO can be obtained by adding the following init.d script to this rom:

/system/etc/init.d/40_diskio_fixup

#!/system/xbin/ash

log -p i -t diskio_fixup "add options nodiratime,noauto_da_alloc to writable partitions to speed up diskIO"

log -p i -t diskio_fixup "remounting data"
mount -o remount,nodiratime,noauto_da_alloc /data

log -p i -t diskio_fixup "remounting cache"
mount -o remount,nodiratime,noauto_da_alloc /cache

To automatically install the script install the following update.zip:
(No wipes needed)

acer_a500/misc/AV041_diskio_fixup_v1_S.zip
MD5: a571f98c60193513862e588e5ac58c58

This will unlikely speed up long read and write operations, however it will speed up short reads and writes particular between many processes. Thus hopefully will make the interface more reactive when many little bits of data are needed from flash. (And significantly improves quadrant if you want to make a graph)

@ezterry: wouldn't it be better to use noatime instead of nodiratime (noatime is a superset of nodiratime anyway, as nodiratime isn't even checked when noatime flag is set)?

Originally Posted by yaworski

@ezterry: wouldn't it be better to use noatime instead of nodiratime (noatime is a superset of nodiratime anyway, as nodiratime isn't even checked when noatime flag is set)?

quiz what was it set to before the remount?

Originally Posted by ezterry

quiz what was it set to before the remount?

I haven't checked what is the default setting before. I've checked now and by default it is mounted with noatime. Then this change makes no sense to me, because using noatime implies nodiratime option anyway. Using nodiratime without noatime will turn on touching atime on files everytime the file is read making reading operations more IO heavy.

I've even checked and remounted /data with the instruction above and nodiratime replaced default noatime flag.

So my question still stands:
Wouldn't it be better to use noatime?

BTW, no offense . I really appreciate all the work you've done. I'm just curious why you made such choice of options. Maybe I'll learn something I didn't know about fs.

Originally Posted by yaworski

I haven't checked what is the default setting before. I've checked now and by default it is mounted with noatime. Then this change makes no sense to me, because using noatime implies nodiratime option anyway. Using nodiratime without noatime will turn on touching atime on files everytime the file is read making reading operations more IO heavy.

I've even checked and remounted /data with the instruction above and nodiratime replaced default noatime flag.

So my question still stands:
Wouldn't it be better to use noatime?

BTW, no offense . I really appreciate all the work you've done. I'm just curious why you made such choice of options. Maybe I'll learn something I didn't know about fs.

-o remount will not change non-listed options, the final result on my system is:

app_69@android:/ $ mount | grep /data
/dev/block/mmcblk0p8 on /data type ext4 (rw,nosuid,nodev,noatime,nodiratime,user_xattr,acl,barrier=1,data=writeback,noauto_da_alloc)

We are adding nodiratime and more important noauto_da_alloc.
(now yes nodiratime is likely a nop because noatime is already included, but we certainty are not removing noatime)

Sent from my A500 using Tapatalk 2

Originally Posted by ezterry

-o remount will not change non-listed options

Hmmm that's strange. When I executed this manually in terminal emulator it removed noatime in my case. I'm sure I used remount option as well. I'll recheck this after work.

Thank you for explaining this. As I've said one can always learn something new .

Originally Posted by yaworski

Hmmm that's strange. When I executed this manually in terminal emulator it removed noatime in my case. I'm sure I used remount option as well. I'll recheck this after work.

Thank you for explaining this. As I've said one can always learn something new .

anyway another under the hood secret, format data ext4 and disable journling.. but you may wish to periodically run e2fsck over it.

(I'm going to pass on supporting this until I can create some nicer user friendly support scripts.. somewhere in my todo list)