From owner-freebsd-stable@FreeBSD.ORG  Mon Mar 28 10:52:52 2011
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id AD0AA106564A;
	Mon, 28 Mar 2011 10:52:52 +0000 (UTC)
	(envelope-from to.my.trociny@gmail.com)
Received: from mail-ww0-f42.google.com (mail-ww0-f42.google.com [74.125.82.42])
	by mx1.freebsd.org (Postfix) with ESMTP id B97608FC18;
	Mon, 28 Mar 2011 10:52:51 +0000 (UTC)
Received: by wwk4 with SMTP id 4so1596784wwk.1
	for <multiple recipients>; Mon, 28 Mar 2011 03:52:50 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:from:to:cc:subject:organization:references
	:sender:date:in-reply-to:message-id:user-agent:mime-version
	:content-type; bh=KViQbIxGRkfFC1VESkTyldOT3bJ/nQHrGEjGbMnWNzo=;
	b=h4z5H97oRpkcl3MwDgITGaBtwOl3O7Xeao5wszwLSHwXo/IoPo4btPFc+/md6EdeVS
	mB883b5Hi0maPHsXKEaWrsA4FBXac9OxhnSw46Z2aiDgy3HNvovAcDE04xVVHb29cojc
	Suh6QKz6TMn8RZSJ+Zd2VwNqddX6XocVamXJc=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=from:to:cc:subject:organization:references:sender:date:in-reply-to
	:message-id:user-agent:mime-version:content-type;
	b=VEXjXYf4Wg6bDy8B/eZu2YLO5mM0Lhezj9cqnBtPoIe30frrvvRDX9rzEyhkbQtIJD
	7bbNWCxnexfNtKVSAYfAyz5LGn+x/9OxI1yVdjzCWCjjclT8tCSdlUXXggKhbKMYEEXO
	yMXxEYDzIkDTRig3u9m3kjuOnAiwODnJLNRWA=
Received: by 10.216.9.200 with SMTP id 50mr2585158wet.83.1301309570572;
	Mon, 28 Mar 2011 03:52:50 -0700 (PDT)
Received: from localhost ([94.27.39.186])
	by mx.google.com with ESMTPS id c54sm1436080wer.30.2011.03.28.03.52.48
	(version=TLSv1/SSLv3 cipher=OTHER);
	Mon, 28 Mar 2011 03:52:49 -0700 (PDT)
From: Mikolaj Golub <trociny@freebsd.org>
To: Pete French <petefrench@ingresso.co.uk>
Organization: TOA Ukraine
References: <E1Q492g-000CvZ-DI@dilbert.ticketswitch.com>
Sender: Mikolaj Golub <to.my.trociny@gmail.com>
Date: Mon, 28 Mar 2011 13:52:45 +0300
In-Reply-To: <E1Q492g-000CvZ-DI@dilbert.ticketswitch.com> (Pete French's
	message of "Mon, 28 Mar 2011 10:47:22 +0100")
Message-ID: <86wrjj5xfm.fsf@in138.ua3>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (berkeley-unix)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: freebsd-fs@freebsd.org, freebsd-stable@freebsd.org,
	freebsd-current@freebsd.org, pjd@freebsd.org
Subject: Re: Any success stories for HAST + ZFS?
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/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: Mon, 28 Mar 2011 10:52:52 -0000


On Mon, 28 Mar 2011 10:47:22 +0100 Pete French wrote:

 >> It is not a hastd crash, but a kernel crash triggered by hastd process.
 >>
 >> I am not sure I got the same crash as you but apparently the race is possible
 >> in g_gate on device creation.
 >>
 >> I got the following crash starting many hast providers simultaneously:

 PF> This is very interestng to me - my successful ZFS+HAST only had
 PF> a single drive, but in my new setup I am intending to use two
 PF> HAST processes and then mirror across thhem under ZFS, so I am
 PF> likely to hit this bug. Are the processes stable once launched ?

Yes, you may hit it only on hast devices creation. The workaround is to avoid
using 'hastctl role primary all', start providers one by one instead.

-- 
Mikolaj Golub