I believe, based on testing, that the from Diff 5 onwards of https://reviews.freebsd.org/D5108 this should work as you expect it i.e.

If boot1 is loaded from a device which has either a UFS or ZFS bootable install then this is the device that will be used to boot.

If said device has both then the ZFS setup will still be tried first.

If you can test in your setup and confirm either way that would be most appreciated.

    Regards
    Steve

On 30/01/2016 06:57, Tomoaki AOKI wrote:
Thanks for your quick support!
I tried your patch [Diff1] (built with head r295032 world/kernel) and
now have good and bad news.

Good news is that without USB memstick boot1.efi runs as expected.
Great!

Bad news is that when booting from USB memstick (the one I used my
previous test, boot1.efi [bootx64.efi] and loader.efi is replaced) and
whichever of internal disk (ada[01]) have loader.efi in its ZFS pool,
ada[01] is booted instead of da0 (USB memstick).

   *If ada0 has loader.efi, always booted from ada0 (stable/10).
   *If ada0 doesn't have loader.efi and ada1 has, booted from ada1
    (head).
   *If both ada0 and ada1 don't have loader.efi, da0 (USB memstick) is
    booted (head, installer is invoked).

  *Whichever ada[01] has loader.efi in their UFS or not didn't matter.

These behaviour would be because ZFS thoughout all disks is tried
before trying UFS throughout all disks, if I understood correctly.

Changing boot order (ZFS to UFS per each disk, instead of each
ZFS to each UFS) would help.
But providing ZFS-disabled boot1.efi (boot1ufs.efi?) for installation
media (memstick, dvd, ...) helps, too. I built ZFS-disabled boot1.efi
and it worked fine for USB memstick for me.

  *`make clean && make -DMK_ZFS=no` in sys/boot/efi/boot1 didn't disabled
    ZFS module, so I must edit the definition of *boot_modules[] in
    boot1.c. I'd have been missing something.

Regards.


On Fri, 29 Jan 2016 02:58:26 +0000
Steven Hartland <kill...@multiplay.co.uk> wrote:

On 28/01/2016 16:22, Doug Rabson wrote:
On 28 January 2016 at 15:03, Tomoaki AOKI <junch...@dec.sakura.ne.jp> wrote:

It's exactly the NO GOOD point. The disk where boot1 is read from
should be where loader.efi and loader.conf are first read.

I just wanted to note that gptzfsboot and zfsboot behaves this way. Boot1
looks for loader in the pool which contains the disk that the BIOS booted.
It passes through the ID of that pool to loader which uses that pool as the
default for loading kernel and modules. I believe this is the correct
behaviour. For gptzfsboot and zfsboot, it is possible to override by
pressing space at the point where it is about to load loader.
I believe I understand at least some of your issue now, could you please
test the code on the following review to see if it fixes your issue please:
https://reviews.freebsd.org/D5108

      Regards
      Steve
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