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Date:      Tue, 22 Feb 2022 19:09:55 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 261538] zfs panic: VERIFY3(l->blk_birth == r->blk_birth) failed
Message-ID:  <bug-261538-227-8TT6luXYvt@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-261538-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-261538-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D261538

--- Comment #2 from John F. Carr <jfc@mit.edu> ---
Created attachment 232017
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D232017&action=
=3Dedit
disable blk_birth assertion

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

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