Dear Maintainer,

When updating the initrd on a forky system with a zfs root on nvme, with
modules=dep set in /etc/initramfs-tools/initramfs.conf, the update-initramfs
script was able to add the zfs modules but not the ones required for nvme. So
boot failed when zfs was unable to import the root pool.

It looks like this happens because initramfs-tools explicitly hands off
determining the root filesystem modules for zfs [1], and then all hooks/zfs has
is "manual_add_modules zfs" [2]. ([1] is also why I'm filing this bug here
instead of against initramfs-tools.)

I was able to fix this for my own system by adding nvme to
/etc/initramfs-tools/modules. But there should be some kind of logic to make
sure the block device drivers are included automatically when using a zfs root,
so this doesn't happen.

Thanks for your work and please let me know if you need any more information,

sney

[1] https://sources.debian.org/src/initramfs-tools/0.150/hook-functions#L521
[2] https://sources.debian.org/src/zfs-linux/2.3.5-2/contrib/initramfs/hooks/zfs.in#L50