==== QEMU with Selfie Block Device Format
Selfie is a virtual block device format introduced in
"Selfie: Co-locating Metadata and Data to Enable Fast Virtual Block Devices".
By Xingbo Wu, Zili Shao, and Song Jiang. [SYSTOR'15]

The code is based on QEMU-v2.2.0. See block/selfie.c for the Selfie driver.

Build QEMU:
  $ ./cfg.sh
  $ ./make.sh

Create a selfie image:
 ./qemu-img create -f selfie -o
init=zero,zone_size=64M,cluster_size=64k selfie.img 280G

To use Selfie in qemu virtual machine, set "format=selfie" when
specifying a block device with "-drive" option.