From owner-freebsd-stable@FreeBSD.ORG  Wed Jul  3 15:12:53 2013
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by hub.freebsd.org (Postfix) with ESMTP id C6DC2A77
 for <freebsd-stable@freebsd.org>; Wed,  3 Jul 2013 15:12:53 +0000 (UTC)
 (envelope-from rdeiriar@spock.cl)
Received: from mail.spock.cl (enteljoven2.enteljoven.cl [164.77.63.23])
 by mx1.freebsd.org (Postfix) with ESMTP id 6D56311F1
 for <freebsd-stable@freebsd.org>; Wed,  3 Jul 2013 15:12:52 +0000 (UTC)
Received: from [10.0.0.110] (200-28-231-70.baf.movistar.cl [200.28.231.70])
 (AUTH: PLAIN rdeiriar@spock.cl, TLS: TLSv1/SSLv3,256bits,CAMELLIA256-SHA)
 by mail.spock.cl with ESMTPSA; Wed, 03 Jul 2013 12:12:23 -0300
 id 00000468.0000000051D43F57.0000B379
Message-ID: <51D43E20.5020400@spock.cl>
Date: Wed, 03 Jul 2013 11:07:12 -0400
From: Roberto de Iriarte <rdeiriar@spock.cl>
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64;
 rv:17.0) Gecko/20130601 Thunderbird/17.0.6
MIME-Version: 1.0
To: freebsd-stable@freebsd.org
Subject: 9.1-STABLE zfsloader failure
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 03 Jul 2013 15:12:53 -0000

Yesterday, i updated /usr/src and proceeded to rebuild world + kernel as 
usual on a zfs root install (single disk)

After installing the machine refused to boot with the following error

ZFS: can't find pool by guid

After booting from CD, i first tried to reinstall gptzfsboot, which 
worked but did not solve the problem

I had to revert to the (thankfully existing!) zfsloader.old in order to 
be able to boot

My disk layout is as follows

Geom name: ada0
modified: false
state: OK
fwheads: 16
fwsectors: 63
last: 625142414
first: 34
entries: 128
scheme: GPT
Providers:
1. Name: ada0p1
    Mediasize: 65536 (64k)
    Sectorsize: 512
    Stripesize: 0
    Stripeoffset: 17408
    Mode: r0w0e0
    rawuuid: 400762ff-df42-11e2-95a9-001cb3c56dfb
    rawtype: 83bd6b9d-7f41-11dc-be0b-001560b84f0f
    label: (null)
    length: 65536
    offset: 17408
    type: freebsd-boot
    index: 1
    end: 161
    start: 34
2. Name: ada0p2
    Mediasize: 8589934592 (8.0G)
    Sectorsize: 512
    Stripesize: 0
    Stripeoffset: 86016
    Mode: r1w1e1
    rawuuid: 517ea784-df42-11e2-95a9-001cb3c56dfb
    rawtype: 516e7cb5-6ecf-11d6-8ff8-00022d09712b
    label: swap0
    length: 8589934592
    offset: 86016
    type: freebsd-swap
    index: 2
    end: 16777383
    start: 168
3. Name: ada0p3
    Mediasize: 311482892288 (290G)
    Sectorsize: 512
    Stripesize: 0
    Stripeoffset: 86016
    Mode: r1w1e2
    rawuuid: 5b9f74d2-df42-11e2-95a9-001cb3c56dfb
    rawtype: 516e7cba-6ecf-11d6-8ff8-00022d09712b
    label: disk0
    length: 311482892288
    offset: 8590020608
    type: freebsd-zfs
    index: 3
    end: 625142407
    start: 16777384
Consumers:
1. Name: ada0
    Mediasize: 320072933376 (298G)
    Sectorsize: 512
    Mode: r2w2e5

The new kernel works ok so far

FreeBSD mbp 9.1-STABLE FreeBSD 9.1-STABLE #0 r252531: Wed Jul  3 
00:14:13 CLT 2013     root@mbp:/usr/obj/usr/src/sys/GENERIC  amd64

Is there anything i can do to help debug the problem?

Best regards,
Roberto