[Bug 261538] zfs panic: VERIFY3(l->blk_birth == r->blk_birth) failed

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 22 Feb 2022 19:09:55 UTC

--- Comment #2 from John F. Carr <jfc@mit.edu> ---
Created attachment 232017
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=232017&action=edit
disable blk_birth assertion

I most likely have the problem from
https://github.com/openzfs/zfs/issues/11480, the combination of deduplication
and cloning can generate blocks with identical DVA_GET_OFFSET but different
blk_birth.  The assertion that failed is not valid on pools with deduplication,
like my system.  Disabling the failing assertion allows deleting the pools that
could not be deleted before.

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