The kernel panic after service zfs onestart seems to be caused by this patch. I can reproduce it every time I run the command from an installation media on a KVM virtual machine.

• Without this patch, service zfs onestart succeeds.
• With this patch and copy_staging enable, the service also starts.
• With this patch, and with the default value of copy_staging, the kernel panics every time I run service zfs onestart. The error message is panic: vm_radix_insert: key 7fffffffc16 is already present.

I fixed my problem: when constructing the page table, the index "i" was defined as int, and it overflowed. After changing the type of "i" from int to uint64, it boots.

I tested this patch on my Sandy Bridge Samsung laptop. It doesn't boot.

In D30828#695823, @bz wrote:

@andrew Given I have seen similar on aarch64 u-boot loader.efi boots, could it be that it's an issue there as well?