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Date:      Tue, 17 Mar 2026 16:12:39 +0100
From:      h v <henry.vogt@gmail.com>
To:        Warner Losh <imp@bsdimp.com>
Cc:        freebsd-current@freebsd.org
Subject:   Re: zfs module not loaded anymore on e.g MINIMAL
Message-ID:  <fdb20aa1-46e6-41ff-83a4-8549ed56c316@gmail.com>
In-Reply-To: <CANCZdfq8gxi2ywvfvCdC%2Bsoqu_9-XPFrvqNNeGqjsJbUfkLoXg@mail.gmail.com>
References:  <5913b3ac-2ed7-42ab-9c26-0d204c38c578@gmail.com> <CANCZdfq8gxi2ywvfvCdC%2Bsoqu_9-XPFrvqNNeGqjsJbUfkLoXg@mail.gmail.com>
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[-- Attachment #1 --]
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
>
>
>
[-- Attachment #2 --]
<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    <p>HI,</p>
    <p>adding the line</p>
    <p>options     ZSTDIO            # zstd-compressed kernel and user
      dumps</p>
    <p>to my custom kernel config fixed my problem.</p>
    <p>so it's likely necessary to add to MINIMAL config to restore
      loading zfs module on boot.</p>
    <p>Regards </p>
    <p>Henry</p>
    <div class="moz-cite-prefix">Am 16.03.26 um 19:02 schrieb Warner
      Losh:<br>
    </div>
    <blockquote type="cite"
cite="mid:CANCZdfq8gxi2ywvfvCdC+soqu_9-XPFrvqNNeGqjsJbUfkLoXg@mail.gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr">Does any kernel load it correctly?
        <div><br>
        </div>
        <div>Warner</div>
      </div>
      <br>
      <div class="gmail_quote gmail_quote_container">
        <div dir="ltr" class="gmail_attr">On Mon, Mar 16, 2026 at
          11:45 AM h v &lt;<a href="mailto:henry.vogt@gmail.com"
            moz-do-not-send="true" class="moz-txt-link-freetext">henry.vogt@gmail.com</a>&gt;
          wrote:<br>
        </div>
        <blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
          <br>
          on current (since ~ March 15th) my custom kernel, based on
          MINIMAL, as <br>
          well as  MINIMAL itself,  don't load zfs and hence refuses to
          mount the <br>
          root fs ... while GENERIC does..<br>
          <br>
          Error (in dmesg) seems to be:<br>
          <br>
          <br>
          kernel: link_elf_obj: symbol ZSTD_isError undefined<br>
          <br>
          kernel: KLD file zfs.ko - could not finalize loading<br>
          <br>
          <br>
          <br>
          Regards<br>
          <br>
          Henry<br>
          <br>
          <br>
          <br>
        </blockquote>
      </div>
    </blockquote>
  </body>
</html>
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