Hi Liu, You might find this thread interesting, http://lists.gnu.org/archive/html/qemu-devel/2012-06/msg04351.html
Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.) Tel:886-2-2788-3799 #1667 Homepage: http://people.cs.nctu.edu.tw/~chenwj
