[Xperia Arc Android Development] gu5t3r:
I tried sd-ext scripts with your kernel and they did not work. Done some reading on Mounts2SD thread. By the dk_zero-cool, maker of the Mounts2SD, the reason it does not work is init.d implementation through Service Manager. sd-ext scripts should be run before service manager, so you should replace "start sysinitsupport" with exec /sbin/sysinitsupport.sh in /init.rc to run init.d scripts before SM.

Something like this:

on early-init
write /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq 806400
# Set init and its forked children's oom_adj.
write /proc/1/oom_adj -16

start ueventd

# create mountpoints
mkdir /mnt 0775 root system

on init

sysclktz 0

loglevel 3

# setup the global environment
export PATH /sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin
export LD_LIBRARY_PATH /vendor/lib:/system/lib
export ANDROID_BOOTLOGO 1
export ANDROID_ROOT /system
export ANDROID_ASSETS /system/app
export ANDROID_DATA /data
export ASEC_MOUNTPOINT /mnt/asec
export LOOP_MOUNTPOINT /mnt/obb
export SD_EXT_DIRECTORY /sd-ext
export BOOTCLASSPATH /system/framework/core.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/apache-xml.jar:/system/framework/filterfw.jar

# Backward compatibility
symlink /system/etc /etc
symlink /sys/kernel/debug /d

# Right now vendor lives on the same filesystem as system,
# but someday that may change.
symlink /system/vendor /vendor

# Create cgroup mount point for cpu accounting
mkdir /acct
mount cgroup none /acct cpuacct
mkdir /acct/uid

mkdir /system
mkdir /data 0771 system system
mkdir /cache 0770 system cache
mkdir /config 0500 root root

# Directory for putting things only root should see.
mkdir /mnt/secure 0700 root root

# Directory for staging bindmounts
mkdir /mnt/secure/staging 0700 root root

# Directory-target for where the secure container
# imagefile directory will be bind-mounted
mkdir /mnt/secure/asec 0700 root root

# Secure container public mount points.
mkdir /mnt/asec 0700 root system
mount tmpfs tmpfs /mnt/asec mode=0755,gid=1000

# Filesystem image public mount points.
mkdir /mnt/obb 0700 root system
mount tmpfs tmpfs /mnt/obb mode=0755,gid=1000

# SD-EXT
mkdir /sd-ext 0771 system system
symlink /sd-ext /mnt/sd-ext

write /proc/sys/kernel/panic_on_oops 1
write /proc/sys/kernel/hung_task_timeout_secs 0
write /proc/cpu/alignment 4
write /proc/sys/kernel/sched_latency_ns 10000000
write /proc/sys/kernel/sched_wakeup_granularity_ns 2000000
write /proc/sys/kernel/sched_compat_yield 1
write /proc/sys/kernel/sched_child_runs_first 0
write /proc/sys/kernel/randomize_va_space 2

# Create cgroup mount points for process groups
mkdir /dev/cpuctl
mount cgroup none /dev/cpuctl cpu
chown system system /dev/cpuctl
chown system system /dev/cpuctl/tasks
chmod 0777 /dev/cpuctl/tasks
write /dev/cpuctl/cpu.shares 1024

mkdir /dev/cpuctl/fg_boost
chown system system /dev/cpuctl/fg_boost/tasks
chmod 0777 /dev/cpuctl/fg_boost/tasks
write /dev/cpuctl/fg_boost/cpu.shares 1024

mkdir /dev/cpuctl/bg_non_interactive
chown system system /dev/cpuctl/bg_non_interactive/tasks
chmod 0777 /dev/cpuctl/bg_non_interactive/tasks
# 5.0 %
write /dev/cpuctl/bg_non_interactive/cpu.shares 52

# Allow everybody to read the xt_qtaguid resource tracking misc dev.
# This is needed by any process that uses socket tagging.
chmod 0644 /dev/xt_qtaguid

on post-fs
# once everything is setup, no need to modify /
mount rootfs rootfs / ro remount

# We chown/chmod /cache again so because mount is run as root + defaults
chown system cache /cache
chmod 0770 /cache

# This may have been created by the recovery system with odd permissions
mkdir /cache/recovery
chown system cache /cache/recovery
chmod 0770 /cache/recovery

#change permissions on vmallocinfo so we can grab it from bugreports
chown root log /proc/vmallocinfo
chmod 0440 /proc/vmallocinfo

#change permissions on kmsg & sysrq-trigger so bugreports can grab kthread stacks
chown root system /proc/kmsg
chmod 0440 /proc/kmsg
chown root system /proc/sysrq-trigger
chmod 0220 /proc/sysrq-trigger

# create the lost+found directories, so as to enforce our permissions
mkdir /cache/lost+found 0770 root root

on post-fs-data
# We chown/chmod /data again so because mount is run as root + defaults
chown system system /data
chmod 0771 /data

# Create dump dir and collect dumps.
# Do this before we mount cache so eventually we can use cache for
# storing dumps on platforms which do not have a dedicated dump partition.
mkdir /data/dontpanic 0750 root log

# Collect apanic data, free resources and re-arm trigger
copy /proc/apanic_console /data/dontpanic/apanic_console
chown root log /data/dontpanic/apanic_console
chmod 0640 /data/dontpanic/apanic_console

copy /proc/apanic_threads /data/dontpanic/apanic_threads
chown root log /data/dontpanic/apanic_threads
chmod 0640 /data/dontpanic/apanic_threads

write /proc/apanic_console 1

# create basic filesystem structure
mkdir /data/misc 01771 system misc
mkdir /data/misc/bluetoothd 0770 bluetooth bluetooth
mkdir /data/misc/bluetooth 0770 system system
mkdir /data/misc/keystore 0700 keystore keystore
mkdir /data/misc/keychain 0771 system system
mkdir /data/misc/vpn 0770 system vpn
mkdir /data/misc/systemkeys 0700 system system
# give system access to wpa_supplicant.conf for backup and restore
mkdir /data/misc/wifi 0770 wifi wifi
chmod 0660 /data/misc/wifi/wpa_supplicant.conf
mkdir /data/local 0751 root root
mkdir /data/local/tmp 0771 shell shell
mkdir /data/data 0771 system system
mkdir /data/app-private 0771 system system
mkdir /data/app 0771 system system
mkdir /data/property 0700 root root

# create dalvik-cache, so as to enforce our permissions
mkdir /data/dalvik-cache 0771 system system

# create resource-cache and double-check the perms
mkdir /data/resource-cache 0771 system system
chown system system /data/resource-cache
chmod 0771 /data/resource-cache

# create the lost+found directories, so as to enforce our permissions
mkdir /data/lost+found 0770 root root

# create directory for DRM plug-ins - give drm the read/write access to
# the following directory.
mkdir /data/drm 0770 drm drm

# If there is no fs-post-data action in the init.<device>.rc file, you
# must uncomment this line, otherwise encrypted filesystems
# won't work.
# Set indication (checked by vold) that we have finished this action
#setprop vold.post_fs_data_done 1

chown system system /sys/class/android_usb/android0/f_mass_storage/lun/file
chmod 0660 /sys/class/android_usb/android0/f_mass_storage/lun/file
chown system system /sys/class/android_usb/android0/f_rndis/ethaddr
chmod 0660 /sys/class/android_usb/android0/f_rndis/ethaddr

on boot
# basic network init
ifup lo
hostname localhost
domainname localdomain

# set RLIMIT_NICE to allow priorities from 19 to -20
setrlimit 13 40 40

# Memory management. Basic kernel parameters, and allow the high
# level system server to be able to adjust the kernel OOM driver
# paramters to match how it is managing things.
write /proc/sys/vm/overcommit_memory 1
write /proc/sys/vm/min_free_order_shift 4
chown root system /sys/module/lowmemorykiller/parameters/adj
chmod 0664 /sys/module/lowmemorykiller/parameters/adj
chown root system /sys/module/lowmemorykiller/parameters/minfree
chmod 0664 /sys/module/lowmemorykiller/parameters/minfree

# Tweak background writeout
write /proc/sys/vm/dirty_expire_centisecs 200
write /proc/sys/vm/dirty_background_ratio 5

# Permissions for System Server and daemons.
chown radio system /sys/android_power/state
chown radio system /sys/android_power/request_state
chown radio system /sys/android_power/acquire_full_wake_lock
chown radio system /sys/android_power/acquire_partial_wake_lock
chown radio system /sys/android_power/release_wake_lock
chown radio system /sys/power/state
chown radio system /sys/power/wake_lock
chown radio system /sys/power/wake_unlock
chmod 0660 /sys/power/state
chmod 0660 /sys/power/wake_lock
chmod 0660 /sys/power/wake_unlock
chown system system /sys/class/timed_output/vibrator/enable
chown system system /sys/class/leds/keyboard-backlight/brightness
chown system system /sys/class/leds/lcd-backlight/brightness
chown system system /sys/class/leds/button-backlight/brightness
chown system system /sys/class/leds/jogball-backlight/brightness
chown system system /sys/class/leds/red/brightness
chown system system /sys/class/leds/green/brightness
chown system system /sys/class/leds/blue/brightness
chown system system /sys/class/leds/red/device/grpfreq
chown system system /sys/class/leds/red/device/grppwm
chown system system /sys/class/leds/red/device/blink
chown system system /sys/class/leds/red/brightness
chown system system /sys/class/leds/green/brightness
chown system system /sys/class/leds/blue/brightness
chown system system /sys/class/leds/red/device/grpfreq
chown system system /sys/class/leds/red/device/grppwm
chown system system /sys/class/leds/red/device/blink
chown system system /sys/class/timed_output/vibrator/enable
chown system system /sys/module/sco/parameters/disable_esco
chown system system /sys/kernel/ipv4/tcp_wmem_min
chown system system /sys/kernel/ipv4/tcp_wmem_def
chown system system /sys/kernel/ipv4/tcp_wmem_max
chown system system /sys/kernel/ipv4/tcp_rmem_min
chown system system /sys/kernel/ipv4/tcp_rmem_def
chown system system /sys/kernel/ipv4/tcp_rmem_max
chown root radio /proc/cmdline

# Define TCP buffer sizes for various networks
# ReadMin, ReadInitial, ReadMax, WriteMin, WriteInitial, WriteMax,
setprop net.tcp.buffersize.default 4096,87380,110208,4096,16384,110208
setprop net.tcp.buffersize.wifi 524288,1048576,2097152,262144,524288,1048576
setprop net.tcp.buffersize.lte 524288,1048576,2097152,262144,524288,1048576
setprop net.tcp.buffersize.umts 4094,87380,110208,4096,16384,110208
setprop net.tcp.buffersize.hspa 4094,87380,262144,4096,16384,262144
setprop net.tcp.buffersize.edge 4093,26280,35040,4096,16384,35040
setprop net.tcp.buffersize.gprs 4092,8760,11680,4096,8760,11680

# Set this property so surfaceflinger is not started by system_init
setprop system_init.startsurfaceflinger 0

#DooMLoRD: init.d scripts support
exec /sbin/sysinitsupport.sh

class_start core
class_start main

on nonencrypted
class_start late_start

on charger
class_start charger

on property:vold.decrypt=trigger_reset_main
class_reset main

on property:vold.decrypt=trigger_load_persist_props
load_persist_props

on property:vold.decrypt=trigger_post_fs_data
trigger post-fs-data

on property:vold.decrypt=trigger_restart_min_framework
class_start main

on property:vold.decrypt=trigger_restart_framework
class_start main
class_start late_start

on property:vold.decrypt=trigger_shutdown_framework
class_reset late_start
class_reset main

# Used to disable USB when switching states
on property:sys.usb.config=none
stop adbd
write /sys/class/android_usb/android0/enable 0
write /sys/class/android_usb/android0/bDeviceClass 0
setprop sys.usb.state $sys.usb.config

# adb only USB configuration
# This should only be used during device bringup
# and as a fallback if the USB manager fails to set a standard configuration
on property:sys.usb.config=adb
write /sys/class/android_usb/android0/enable 0
write /sys/class/android_usb/android0/idVendor 18d1
write /sys/class/android_usb/android0/idProduct D002
write /sys/class/android_usb/android0/functions $sys.usb.config
write /sys/class/android_usb/android0/enable 1
start adbd
setprop sys.usb.state $sys.usb.config

# USB accessory configuration
on property:sys.usb.config=accessory
write /sys/class/android_usb/android0/enable 0
write /sys/class/android_usb/android0/idVendor 18d1
write /sys/class/android_usb/android0/idProduct 2d00
write /sys/class/android_usb/android0/functions $sys.usb.config
write /sys/class/android_usb/android0/enable 1
setprop sys.usb.state $sys.usb.config

# USB accessory configuration, with adb
on property:sys.usb.config=accessory,adb
write /sys/class/android_usb/android0/enable 0
write /sys/class/android_usb/android0/idVendor 18d1
write /sys/class/android_usb/android0/idProduct 2d01
write /sys/class/android_usb/android0/functions $sys.usb.config
write /sys/class/android_usb/android0/enable 1
start adbd
setprop sys.usb.state $sys.usb.config

# Used to set USB configuration at boot and to switch the configuration
# when changing the default configuration
on property:persist.sys.usb.config=*
setprop sys.usb.config $persist.sys.usb.config

## Daemon processes to be run by init.
##
service ueventd /sbin/ueventd
class core
critical

service console /system/bin/sh
class core
console
disabled
user shell
group log

on property:ro.debuggable=1
start console

# adbd is controlled via property triggers in init.<platform>.usb.rc
service adbd /sbin/adbd
class core
disabled

# adbd on at boot in emulator
on property:ro.kernel.qemu=1
start adbd

# This property trigger has added to imitiate the previous behavior of "adb root".
# The adb gadget driver used to reset the USB bus when the adbd daemon exited,
# and the host side adb relied on this behavior to force it to reconnect with the
# new adbd instance after init relaunches it. So now we force the USB bus to reset
# here when adbd sets the service.adb.root property to 1. We also restart adbd here
# rather than waiting for init to notice its death and restarting it so the timing
# of USB resetting and adb restarting more closely matches the previous behavior.
on property:service.adb.root=1
write /sys/class/android_usb/android0/enable 0
restart adbd
write /sys/class/android_usb/android0/enable 1

service servicemanager /system/bin/servicemanager
class core
user system
group system
critical
onrestart restart zygote
onrestart restart media
onrestart restart surfaceflinger
onrestart restart drm

service vold /system/bin/vold
class core
socket vold stream 0660 root mount
ioprio be 2

service netd /system/bin/netd
class main
socket netd stream 0660 root system dbus_access
socket dnsproxyd stream 0660 root inet

service debuggerd /system/bin/debuggerd
class main

service ril-daemon /system/bin/rild
class main
socket rild stream 660 root radio
socket rild-debug stream 660 radio system
user root
group radio cache inet misc audio sdcard_rw log dbus_access

service surfaceflinger /system/bin/surfaceflinger
class main
user system
group graphics
onrestart restart zygote
rlimit MEMLOCK 33554432 33554432

service zygote /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server
class main
socket zygote stream 660 root system
onrestart write /proc/sysrq-trigger c

service drm /system/bin/drmserver
class main
user drm
group system inet drmrpc

service bootanim /system/bin/bootanimation
class main
user graphics
group graphics
disabled
oneshot

service dbus /system/bin/dbus-daemon --system --nofork
class main
socket dbus stream 660 bluetooth bluetooth
socket dbus_ste stream 660 bluetooth dbus_access
user bluetooth
group bluetooth net_bt_admin dbus_access

service bluetoothd /system/bin/bluetoothd -n
class main
socket bluetooth stream 660 bluetooth bluetooth
socket dbus_bluetooth stream 660 bluetooth bluetooth
# init.rc does not yet support applying capabilities, so run as root and
# let bluetoothd drop uid to bluetooth with the right linux capabilities
group bluetooth net_bt_admin misc
disabled

service installd /system/bin/installd
class main
socket installd stream 600 system system

service flash_recovery /system/etc/install-recovery.sh
class main
oneshot

service racoon /system/bin/racoon
class main
socket racoon stream 600 system system
# IKE uses UDP port 500. Racoon will setuid to vpn after binding the port.
group vpn net_admin inet
disabled
oneshot

service mtpd /system/bin/mtpd
class main
socket mtpd stream 600 system system
user vpn
group vpn net_admin inet net_raw
disabled
oneshot

service keystore /system/bin/keystore /data/misc/keystore
class main
user keystore
group keystore
socket keystore stream 666

service dumpstate /system/bin/dumpstate -s
class main
socket dumpstate stream 0660 shell log
disabled
oneshot

Line "write /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq 806400" at the begining I added for myself because CPU runs on 1.6GHz for about 1 sec at every restart, this way it runs only 70ms.

Don't know if you need to add "export PATH=/sbin:/system/sbin:/system/bin:/system/xbin" to /sbin/sysinitsupport.sh or PATH is already set?

Will test it soon myself. This is suggestion for future releases. =)

Love your kernel, keep up the good work...