[Bug 271292] kernel panic while dd'ing a USB disk to a ZFS directory

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 08 May 2023 03:26:45 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271292

--- Comment #19 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Mark Millard from comment #17)

FYI: Looking at the logs listed by:

https://cgit.freebsd.org/src/log/sys/contrib/openzfs/include/zfeature_common.h

is a way to find when features were likely first
imported:

SPA_FEATURE_AVZ_V2        : 2023-May-03
SPA_FEATURE_BLOCK_CLONING : 2023-Apr-03
SPA_FEATURE_BLAKE3        : 2022-Jun-23
SPA_FEATURE_HEAD_ERRLOG   : 2022-May-12
SPA_FEATURE_ZILSAXATTR    : 2022-Mar-08

And on 2021-Feb-18:

-#if !defined(__FreeBSD__)
        SPA_FEATURE_EDONR,
-#endif

(Past that gets into the SVN time frame.)

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