From owner-freebsd-current@FreeBSD.ORG  Fri Dec 18 18:04:52 2009
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 75ED11065672
	for <freebsd-current@freebsd.org>; Fri, 18 Dec 2009 18:04:52 +0000 (UTC)
	(envelope-from asmrookie@gmail.com)
Received: from mail-fx0-f227.google.com (mail-fx0-f227.google.com
	[209.85.220.227])
	by mx1.freebsd.org (Postfix) with ESMTP id 0C96F8FC19
	for <freebsd-current@freebsd.org>; Fri, 18 Dec 2009 18:04:51 +0000 (UTC)
Received: by fxm27 with SMTP id 27so3103827fxm.3
	for <freebsd-current@freebsd.org>; Fri, 18 Dec 2009 10:04:51 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:mime-version:sender:received:in-reply-to
	:references:date:x-google-sender-auth:message-id:subject:from:to:cc
	:content-type; bh=6a9K3AguplvWdbO4A6YUc+F4cF/BfghRpyzPg1m6NsE=;
	b=MjscoPLIrOLWcd17910lauKG4FPtzIjDwoEBaYiO+87Z9seGTZttMVkyMW33WYB+Bm
	/DJICzoNSSNnVSZbsLSPHg0Dlouf5W0lbXxvpq77SdvJtOQXiEgmum4NCoCsJSMFGVY/
	A9mqDd7HTbJnH4XLfo2J9M/PJwKkt8K/RJz20=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=mime-version:sender:in-reply-to:references:date
	:x-google-sender-auth:message-id:subject:from:to:cc:content-type;
	b=xVbzumXIAKwuPHW2AeT8fWS8eEK9hY568v7PGrQhyXIGsLC1JQs1JIMLfLvY1yve2g
	l1O4CS9oI2nAw/fsWDCuyD0N+uZa08ppXK9UmxprFvUhEx0cKTGraN4rTKzl/kerODXx
	xjIBVgahDmx90kPnCsnuPLK+md/52MqIcg1HA=
MIME-Version: 1.0
Sender: asmrookie@gmail.com
Received: by 10.223.161.205 with SMTP id s13mr5421691fax.70.1261159490663; 
	Fri, 18 Dec 2009 10:04:50 -0800 (PST)
In-Reply-To: <39309F560B98453EBB9AEA0F29D9D80E@vosz.local>
References: <39309F560B98453EBB9AEA0F29D9D80E@vosz.local>
Date: Fri, 18 Dec 2009 19:04:50 +0100
X-Google-Sender-Auth: 0fba61534d7dd9ee
Message-ID: <3bbf2fe10912181004w2a1abff2re8f77fd6a8bc3233@mail.gmail.com>
From: Attilio Rao <attilio@freebsd.org>
To: Alexander Zagrebin <alexz@visp.ru>
Content-Type: text/plain; charset=UTF-8
Cc: freebsd-current@freebsd.org
Subject: Re: 8.0-RELEASE: disk IO temporarily hangs up (ZFS or ATA related 
	problem)
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 18 Dec 2009 18:04:52 -0000

2009/12/17 Alexander Zagrebin <alexz@visp.ru>:
> Hi!
>
> I use onboard ICH7 SATA controller with two disks attached:
>
> atapci1: <Intel ICH7 SATA300 controller> port
> 0x30c8-0x30cf,0x30ec-0x30ef,0x30c0-0x30c7,0x30e8-0x30eb,0x30a0-0x30af irq 19
> at device 31.2 on pci0
> atapci1: [ITHREAD]
> ata2: <ATA channel 0> on atapci1
> ata2: [ITHREAD]
> ata3: <ATA channel 1> on atapci1
> ata3: [ITHREAD]
> ad4: 1430799MB <Seagate ST31500541AS CC34> at ata2-master SATA150
> ad6: 1430799MB <WDC WD15EADS-00P8B0 01.00A01> at ata3-master SATA150
>
> The disks are used for mirrored ZFS pool.
> I have noticed that the system periodically locks up on disk operations.
> After approx. 10 min of very slow disk i/o (several KB/s) the speed of disk
> operations restores to normal.
> gstat has shown that the problem is in ad6.

Want you try this patch and report?:
http://people.freebsd.org/~attilio/lockmgr_lostwake.diff

It should apply to STABLE_8 and if not, just report and I will help.

Thanks,
Attilio


-- 
Peace can only be achieved by understanding - A. Einstein