I finally managed to make rooted kernel for Xperia Go (ST27i).
I just want to mention, that I have unlocked bootloader and I didn't try is this kernel working with locked bootloader.
stock Sony 6.0.B.3.162 FW
How to Flash:
download the rooted_kernel_ST27i.elf (sendspace.com/file/74xilq)
save it in the folder with fastboot binaries (fastboot.exe files)
power down device
start device in fastboot mode (hold volume up and plug cable)
and use the following commands to flash the kernel:
fastboot flash boot rooted_kernel_ST27i.elf
After restart, download and install busybox from market, and update superuser...
Rooted kernel .184 (without recovery )
It's work for me
Flash last firmware 6.0.B.3.184 using Flashtool
Download attach, and flash the kernel:
fastboot flash boot rooted_kernel_184_ST27i.elf
I can't do this without:
DooMLoRD - I used his files from rooted kernel for Xperia P
Championswimmer - for tips and tool (ANDROID KERNEL KITCHEN 0.2.2)
Bin4ry - for tips
So, thanks to them