Re: zfs module not loaded anymore on e.g MINIMAL

From: Warner Losh <imp_at_bsdimp.com>
Date: Wed, 18 Mar 2026 13:11:23 UTC
Hey Martin,

Can you track this down?

Warner

On Tue, Mar 17, 2026 at 9:12 AM h v <henry.vogt@gmail.com> wrote:

> HI,
>
> adding the line
>
> options     ZSTDIO            # zstd-compressed kernel and user dumps
>
> to my custom kernel config fixed my problem.
>
> so it's likely necessary to add to MINIMAL config to restore loading zfs
> module on boot.
>
> Regards
>
> Henry
> Am 16.03.26 um 19:02 schrieb Warner Losh:
>
> Does any kernel load it correctly?
>
> Warner
>
> On Mon, Mar 16, 2026 at 11:45 AM h v <henry.vogt@gmail.com> wrote:
>
>> Hi,
>>
>> on current (since ~ March 15th) my custom kernel, based on MINIMAL, as
>> well as  MINIMAL itself,  don't load zfs and hence refuses to mount the
>> root fs ... while GENERIC does..
>>
>> Error (in dmesg) seems to be:
>>
>>
>> kernel: link_elf_obj: symbol ZSTD_isError undefined
>>
>> kernel: KLD file zfs.ko - could not finalize loading
>>
>>
>>
>> Regards
>>
>> Henry
>>
>>
>>
>>