From owner-freebsd-stable@FreeBSD.ORG  Sun Nov 16 06:39:32 2014
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])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 3DDBE15D
 for <freebsd-stable@freebsd.org>; Sun, 16 Nov 2014 06:39:32 +0000 (UTC)
Received: from mail-ie0-x235.google.com (mail-ie0-x235.google.com
 [IPv6:2607:f8b0:4001:c03::235])
 (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits))
 (Client CN "smtp.gmail.com",
 Issuer "Google Internet Authority G2" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 07040FBA
 for <freebsd-stable@freebsd.org>; Sun, 16 Nov 2014 06:39:32 +0000 (UTC)
Received: by mail-ie0-f181.google.com with SMTP id tp5so717123ieb.40
 for <freebsd-stable@freebsd.org>; Sat, 15 Nov 2014 22:39:31 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:from:date:message-id:subject:to:content-type;
 bh=9KaYAy4KYlyQvVbOQZz8iCrsuxjZRXCZtbQKKkrLV1o=;
 b=UMWiSW9aAcqOwFd9ToBhznmssDzP9NP3FjY5WZjFImyYcLAnLeBGa6sMPgorL2itmO
 3Ye7+mToc2q90GRP8Krq1OGSGvX0WfSwyCj/aCfYnG1ZE2c4GkfPiZCQiF++sWTPvREL
 brWEFJHSLRpzBNeNUSWldnVbCWtH9w+3ckZBU9GwbHLdwpDJVs/N1pKIGgbv/dUQRoUS
 bbe0JXD6P6zvoUFzkjCOS401IwmkGLcN3uQSi+MZiaXOXFgNCxZMooOeWFTNQY7/Y7Ha
 FZvWhrF5wOuhbd50xYjwcMH/1O4yYqvjeLClQkZx+DU5SLtWj7gbi4dpjb37CUS9fVcH
 ywiQ==
X-Received: by 10.50.25.100 with SMTP id b4mr17473790igg.17.1416119971422;
 Sat, 15 Nov 2014 22:39:31 -0800 (PST)
MIME-Version: 1.0
Received: by 10.50.245.163 with HTTP; Sat, 15 Nov 2014 22:38:51 -0800 (PST)
From: Bogdan SOLGA <bogdan.solga@gmail.com>
Date: Sun, 16 Nov 2014 08:38:51 +0200
Message-ID: <CAHHzeCWv=iw1Vc7ECEZsviphQ7k4cw3D6crDNOaM1Jsd7yM8LQ@mail.gmail.com>
Subject: ZFS pool creation from files leads to a crash
To: freebsd-stable@freebsd.org
Content-Type: text/plain; charset=UTF-8
X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.18-1
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: Sun, 16 Nov 2014 06:39:32 -0000

Hello, everyone!

Yesterday I have started to test FreeBSD-10.1-RELEASE, using VirtualBox VMs
created from the mfsBSD <http://mfsbsd.vx.sk/> 10.1 image. I installed the
system on a 2 GB zpool, with fletcher4 checksumming and LZJB compression.

As I need some other ZFS zpools for testing purposes, I have tried to
create them from a few empty files, created as follows:
# truncate -s 100M /tmp/file1
# truncate -s 100M /tmp/file2
# zpool create test-pool /tmp/zfile1 /tmp/file2

When the 'zpool create' command is executed, it leads to a crash and the VM
is automatically restarted. I have searched the crash dump in the logs, but
coulnd't find it.

The same operation (creating a ZFS pool from files) works properly on
FreeBSD-10-RELEASE.

Any help is appreciated :)

Thank you!

Kind regards,
Bogdan