From owner-freebsd-fs@FreeBSD.ORG  Thu Sep 16 11:17:49 2010
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 09E8A1065679;
	Thu, 16 Sep 2010 11:17:49 +0000 (UTC) (envelope-from avg@icyb.net.ua)
Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140])
	by mx1.freebsd.org (Postfix) with ESMTP id 1CE6B8FC13;
	Thu, 16 Sep 2010 11:17:47 +0000 (UTC)
Received: from odyssey.starpoint.kiev.ua (alpha-e.starpoint.kiev.ua
	[212.40.38.101])
	by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id OAA29537;
	Thu, 16 Sep 2010 14:17:46 +0300 (EEST)
	(envelope-from avg@icyb.net.ua)
Message-ID: <4C91FCD9.1000203@icyb.net.ua>
Date: Thu, 16 Sep 2010 14:17:45 +0300
From: Andriy Gapon <avg@icyb.net.ua>
User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US;
	rv:1.9.2.9) Gecko/20100909 Lightning/1.0b2 Thunderbird/3.1.3
MIME-Version: 1.0
To: Alexander Motin <mav@FreeBSD.org>
References: <20100909140000.5744370gkyqv4eo0@webmail2.ukgrid.net>
	<20100909182318.11133lqu4q4u1mw4@webmail2.ukgrid.net>
	<4C89D6A8.1080107@icyb.net.ua>
	<20100910143900.20382xl5bl6oo9as@webmail2.ukgrid.net>
	<20100910141127.GA13056@icarus.home.lan>
	<20100910155510.11831w104qjpyc4g@webmail2.ukgrid.net>
	<20100910152544.GA14636@icarus.home.lan>
	<20100910173912.205969tzhjiovf8c@webmail2.ukgrid.net>
	<4C8A6B26.8050305@icyb.net.ua>
	<20100910184921.16956kbaskhrsmg4@webmail2.ukgrid.net>
	<4C8A7B20.7090408@FreeBSD.org> <4C91F845.4010100@FreeBSD.org>
In-Reply-To: <4C91F845.4010100@FreeBSD.org>
X-Enigmail-Version: 1.1.2
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: freebsd-fs@FreeBSD.org, a.smith@ukgrid.net
Subject: Re: ZFS related kernel panic
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: Thu, 16 Sep 2010 11:17:49 -0000

on 16/09/2010 13:58 Alexander Motin said the following:
> Thanks to console access provided, I have found the reason of crash.
> Attached patch should fix it. Patched system successfully runs the
> stress test for 45 minutes now, comparing to crashing in few minutes
> without it.
> 
> Also I've found that timeouts reported by the driver are not fatal.
> Affected commands are correctly completing as soon as after detecting
> time out driver freezes new incoming requests to resolve situation, and
> as result, idling the bus. ones. These timeouts I think caused by some
> congestion on SATA interface, that probably caused by port multiplier.
> This panic could be triggered only by such fake timeouts, not the real


Can the same happen with ahci (in theory)?
Thanks a lot!

-- 
Andriy Gapon