FreeBSD/powerpc64 head r313561's /boot/loader cannot boot the kernel from NFS

[Hiroo Ono (小野寛生)]

I installed FreeBSD/powerpc64 head r313561 (snapshot of 20170210) and had
the problem below:

I tried to net boot the installer. The configuration of isc-dhcp is:

host powerpc {
  hardware ethernet xxx:xx:xx:xx:xx:xx;
  fixed address 192.168.0.15;
  next-server 192.168.0.10;
  filename "loader";
  option root-path "192.168.0.10:/exports/FreeBSD/ppc64/12c-20170210";
}

tftp configuration in inetd.conf is:

tftp dgram udp wait root /usr/local/libexec/in.tftpd in.tftpd -s
/exports/FreeBSD/ppc64/12c-20170210/boot

and 192.168.0.10:/exports/FreeBSD/ppc64/12c-20170210 is NFS mountable with
full system
copied from disc1.iso.

I tried to boot from openfirmware console

> boot eboot:,loader

the file loader was retrieved via tftp and executed, but it said it cannot
find the file 'kernel' or it could not boot the file "kernel".
(I forgot the exact message.)

I replaced /boot/loader with the loader of 11.0-RELEASE. It successfully
booted /boot/kernel/kernel,
and I managed to install.

Is there something wrong with my configuration, or is there a bug in
/boot/loader?