From owner-freebsd-stable@freebsd.org  Wed Feb 22 21:13:38 2017
Return-Path: <owner-freebsd-stable@freebsd.org>
Delivered-To: freebsd-stable@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 04A2CCE99A9;
 Wed, 22 Feb 2017 21:13:38 +0000 (UTC)
 (envelope-from eugen@grosbein.net)
Received: from hz.grosbein.net (hz.grosbein.net [78.47.246.247])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified))
 by mx1.freebsd.org (Postfix) with ESMTPS id 96ABC1AB4;
 Wed, 22 Feb 2017 21:13:36 +0000 (UTC)
 (envelope-from eugen@grosbein.net)
Received: from eg.sd.rdtc.ru (root@eg.sd.rdtc.ru [62.231.161.221])
 by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id v1ML5jP3012590
 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT);
 Wed, 22 Feb 2017 22:05:46 +0100 (CET)
 (envelope-from eugen@grosbein.net)
X-Envelope-From: eugen@grosbein.net
X-Envelope-To: lev@FreeBSD.org
Received: from [10.58.0.4] ([10.58.0.4])
 by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id v1ML5g01037465
 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT);
 Thu, 23 Feb 2017 04:05:42 +0700 (+07)
 (envelope-from eugen@grosbein.net)
Subject: Re: Is it known problem, that zfs.ko could not be built with system
 compiler (clang 3.9.1) without optimization?
To: Lev Serebryakov <lev@FreeBSD.org>, freebsd-stable@freebsd.org,
 freebsd-fs@freebsd.org
References: <492944119.20170222234742@serebryakov.spb.ru>
From: Eugene Grosbein <eugen@grosbein.net>
Message-ID: <58ADFD21.1010208@grosbein.net>
Date: Thu, 23 Feb 2017 04:05:37 +0700
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101
 Thunderbird/38.7.2
MIME-Version: 1.0
In-Reply-To: <492944119.20170222234742@serebryakov.spb.ru>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
X-Spam-Status: No, score=0.3 required=5.0 tests=BAYES_00,LOCAL_FROM
 autolearn=no autolearn_force=no version=3.4.1
X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1%
 *      [score: 0.0000] *  2.6 LOCAL_FROM From my domains
X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on hz.grosbein.net
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <https://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: <https://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 22 Feb 2017 21:13:38 -0000

23.02.2017 3:47, Lev Serebryakov пишет:
> Hello Freebsd-stable,
>
>     Now if you build zfs.ko with -O0 it panics on boot.
>
>     If you use default optimization level, a lot of fbt DTreace probes are
>    missing.

If you use it with i386 (32 bits), you must use loader.conf tunnable: kern.kstack_pages=4
or corresponding kernel options KSTACK_PAGES=4, do you?