finally, I fount archlinux default kernel added lxc & btrfs now(25/12/2010)
so, I try install lxc arch host from gentoo, chroot way 
mkfs.btrfs -Larch /dev/hda8
mount -t btrfs /dev/hda8 /mnt/arch
mkdir -p /mnt/arch/var/lib/pacman
alias pp=’pacman -r /mnt/arch’
pp -Sy base wpa_supplicant ipw2100-fw
cp /etc/resolv.conf /mnt/arch/etc/resolv.conf
vi /mnt/arch/etc/pacman.conf
vi /mnt/arch/etc/pacman.d/mirrorlist
mount -o bind /dev /mnt/arch/dev/;mount -o bind /proc /mnt/arch/proc/;mount -o bind /sys /mnt/arch/sys/
chroot /mnt/arch/alias pp=’pacman’
pp -Syu
pp -S zsh grml-zsh-config git lvm2
exit
chroot /mnt/arch/ /bin/zsh
alias pp=’pacman’
mkdir -p zeroarch;zeroarch;wget "https://aur.archlinux.org/packages/packer/packer/PKGBUILD" ; makepkg -fic
wget "https://aur.archlinux.org/packages/packer/packer/PKGBUILD" –no-check-certificate ; makepkg -fic –asroot
alias pp=’packer’
pp -S axel pacman-color vim lvm2 base-devel netcfg pacman-color btrfs-progs-git sudo devtools bridge-utils
mkinitcpio -p kernel26
vim /etc/rc.conf
TIMEZONE="Asia/Hong_Kong"
USELVM="yes"
HOSTNAME="mvll"
vim /etc/hosts
127.0.0.1 mvll.local mvll
vim /etc/dhcpcd.conf
nohook resolv.conf
network
DAEMONS=(network @syslog-ng netfs @crond)
umount /mnt/arch/sys /mnt/arch/proc /mnt/arch/dev
umount /mnt/arch/
https://wiki.archlinux.org/index.php/Beginners_Guide#F:_Configure_the_System
https://wiki.archlinux.org/index.php/Install_From_Existing_Linux
https://wiki.archlinux.org/index.php/Installing_on_Btrfs_root
vps-lxc
# vps-lxc mktpl -a 32 -d archlinux vps-arch
https://github.com/extofme/vps-lxc