From owner-freebsd-current@FreeBSD.ORG Sun Dec 6 00:31:44 2009 Return-Path: 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 3534D106566B; Sun, 6 Dec 2009 00:31:44 +0000 (UTC) (envelope-from efinley.lists@gmail.com) Received: from mail-px0-f190.google.com (mail-px0-f190.google.com [209.85.216.190]) by mx1.freebsd.org (Postfix) with ESMTP id F3E368FC14; Sun, 6 Dec 2009 00:31:43 +0000 (UTC) Received: by pxi28 with SMTP id 28so1203355pxi.7 for ; Sat, 05 Dec 2009 16:31:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=StkMay8elY7R5TBrX9b0P4wsv6VYKUafHSbI8H8HFPg=; b=dArEcG7j135VN4AvgjwF2ZuQetKqAY4yEcSN8GA25hm7sQ4Wnf4G61A4+Y/6odJWN4 0sQ8RMpLn3zg+b8roFCw0AUOdHICLgten1Cmp3Cs72Wq5oQqpgxJiFDYBt3lYvlrz5Nn sIRfKsiLF9HJ4aoxtpKN38hO9osD72LXh0S7M= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=EXVf8i24dvfcgzaNw+kjCsKnbB04UsRd9UPELPDJgQ4nM5ElPybIS+C5qSaJgFYyAs nW2IQScet4Ax2GS5iYC2AwgrfrF8leFl0GFDyFrmOWPshAA62CGz3tKUo9eWZngfIE46 KLbDbAv6AlPpZwxtLVpA4nt/4bZvHtrdADt+4= MIME-Version: 1.0 Received: by 10.143.153.42 with SMTP id f42mr555763wfo.162.1260059503382; Sat, 05 Dec 2009 16:31:43 -0800 (PST) In-Reply-To: <20091205224826.GA92509@server.vk2pj.dyndns.org> References: <20091128212226.GA9841@server.vk2pj.dyndns.org> <3ABF47F1-86EC-4CF2-9D42-86344D0F455B@exscape.org> <20091130081330.GA2202@server.vk2pj.dyndns.org> <20091205224826.GA92509@server.vk2pj.dyndns.org> Date: Sat, 5 Dec 2009 17:31:43 -0700 Message-ID: <54e63c320912051631h70307ca8m1106b5e88e731fef@mail.gmail.com> From: Elliot Finley To: Peter Jeremy Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-current@freebsd.org, freebsd-stable@freebsd.org Subject: Re: Non-responsive 8.0-RC1 (now 8.0-STABLE) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Dec 2009 00:31:44 -0000 On Sat, Dec 5, 2009 at 3:48 PM, Peter Jeremy wrote: > On 2009-Nov-30 19:13:30 +1100, Peter Jeremy > wrote: > >On 2009-Nov-29 08:56:55 +0100, Thomas Backman > wrote: > >> > >>On Nov 28, 2009, at 10:22 PM, Peter Jeremy wrote: > >> > >>> My main server is running 8.0/amd64 from between RC1 and RC2 and I've > >>> recently had a couple of long-duration hangs on it during which time > >>> processes doing I/O will stop responding. > ... > >It actually "hung" again just after I sent the original mail. This > >time I managed to get console access and could check the kernel state. > >This showed that a number of processes were blocked on ZFS locks. > >The most commonly reported state was 'tx->tx_quiesce_done_cv)'. > > I've upgraded to 8-STABLE from 30-Nov and the problem is still present, > even after disabling the boinc processes. > > This seems to leave race conditions inside ZFS as the only option. > > Has anyone else seen anything like this? > > I have a machine running 7.2 that does the same thing if I don't disable ZIL and prefetch (probably just one of them triggers the hang, just haven't had time to see which one). I'll be upgrading it to 8-Stable in the next week or so and I'll see if the problem persists. One data point that may or may not be relevant is that the process that always triggers the hangs is istgt (iSCSI target from ports). Elliot