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Date:      Thu, 07 May 2020 21:25:52 -0300
From:      Joseph Mingrone <jrm@FreeBSD.org>
To:        questions@freebsd.org
Cc:        kevans@FreeBSD.org,  tsoome@FreeBSD.org,  Steve Wills <swills@freebsd.org>,  Allan Jude <allanjude@freebsd.org>
Subject:   Re: ZFS system can no longer boot -  zfs_alloc()/zfs_free() mismatch
Message-ID:  <86v9l7b7cf.fsf@phe.ftfl.ca>
In-Reply-To: <CANRUcdAtNWdMMoSYmZ27NEFgPQTF7-KFdBXBTy6JmuDxG8edUw@mail.gmail.com> (Joseph Mingrone's message of "Thu, 7 May 2020 20:59:16 -0300")
References:  <CANRUcdAtNWdMMoSYmZ27NEFgPQTF7-KFdBXBTy6JmuDxG8edUw@mail.gmail.com>

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Joseph Mingrone <jrm@FreeBSD.org> writes:

> Hello everyone,

> As it says in the subject line, my system stopped booting for some
> unknown reason.  It might have been after upgrading from 12.1-p2 to
> -p4, but I'm unsure.  It sounds similar to this issue:
> https://twitter.com/alelab_/status/1222437570501644291

> Allan and I tried debugging for a few hours today, but without
> success.  We tried replacing the boot code and the loaders, but the
> result was the same.  We also tried booting from a usb thumb drive,
> then `set currdev=zfs:zroot/ROOT/default:` and `boot`, but the same
> error is shown.

> Steve and Kyle, did you ever solve this problem?

> Thanks,

> Joe

Update:

After half a day of pulling my hair out, I just tried booting from an
older kernel (from before `freebsd-update` to 12.1-p4) and it booted.

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