From owner-freebsd-fs@FreeBSD.ORG  Fri Jul 13 21:57:29 2012
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 3EFA4106564A
	for <freebsd-fs@freebsd.org>; Fri, 13 Jul 2012 21:57:29 +0000 (UTC)
	(envelope-from dim@FreeBSD.org)
Received: from tensor.andric.com (cl-327.ede-01.nl.sixxs.net
	[IPv6:2001:7b8:2ff:146::2])
	by mx1.freebsd.org (Postfix) with ESMTP id EB97A8FC0A
	for <freebsd-fs@freebsd.org>; Fri, 13 Jul 2012 21:57:28 +0000 (UTC)
Received: from [192.168.0.6] (spaceball.home.andric.com [192.168.0.6])
	(using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits))
	(No client certificate requested)
	by tensor.andric.com (Postfix) with ESMTPSA id 249795C37;
	Fri, 13 Jul 2012 23:57:28 +0200 (CEST)
Message-ID: <500099C6.6020400@FreeBSD.org>
Date: Fri, 13 Jul 2012 23:57:26 +0200
From: Dimitry Andric <dim@FreeBSD.org>
Organization: The FreeBSD Project
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64;
	rv:14.0) Gecko/20120619 Thunderbird/14.0
MIME-Version: 1.0
To: Dennis Glatting <freebsd@penx.com>
References: <1341864787.32803.43.camel@btw.pki2.com>
	<4FFFE82B.6010109@gmail.com>
	<1342187238.60733.27.camel@btw.pki2.com>
In-Reply-To: <1342187238.60733.27.camel@btw.pki2.com>
X-Enigmail-Version: 1.5a1pre
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: freebsd-fs@freebsd.org, Volodymyr Kostyrko <c.kworr@gmail.com>
Subject: Re: ZFS hanging
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 13 Jul 2012 21:57:29 -0000

On 2012-07-13 15:47, Dennis Glatting wrote:
...
> I am using clang except on my CVS mirrors.
> 
> I found on the mirrors that the mirror itself cannot update from itself
> but other hosts can update from the mirror. Somewhere in that
> M3/assembly muck something crashes in the process. The only way around
> the problem is to compile the /OS/ using GCC.

This is a known problem with ezm3, it aligns the stack incorrectly on
amd64.  See also bin/162588.  Possible workarounds are:

- Compiling libz with clang, but with SSE disabled
- Compiling the whole system with clang, but with SSE disabled
- Fixing ezm3 so it aligns the stack to 16 bytes (left as exercise for
  the reader ;)
- Rewriting cvsup in C (another nice exercise...)