From owner-freebsd-current@FreeBSD.ORG Sun Feb 21 11:10:44 2010 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 CE574106566B for ; Sun, 21 Feb 2010 11:10:44 +0000 (UTC) (envelope-from peterjeremy@acm.org) Received: from mail11.syd.optusnet.com.au (mail11.syd.optusnet.com.au [211.29.132.192]) by mx1.freebsd.org (Postfix) with ESMTP id 23ADC8FC19 for ; Sun, 21 Feb 2010 11:10:43 +0000 (UTC) Received: from server.vk2pj.dyndns.org (c122-106-232-148.belrs3.nsw.optusnet.com.au [122.106.232.148]) by mail11.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id o1LBAffs022749 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 21 Feb 2010 22:10:42 +1100 X-Bogosity: Ham, spamicity=0.000000 Received: from server.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by server.vk2pj.dyndns.org (8.14.3/8.14.3) with ESMTP id o1LBAefl082228 for ; Sun, 21 Feb 2010 22:10:40 +1100 (EST) (envelope-from peter@server.vk2pj.dyndns.org) Received: (from peter@localhost) by server.vk2pj.dyndns.org (8.14.3/8.14.3/Submit) id o1LBAenY082227 for freebsd-current@freebsd.org; Sun, 21 Feb 2010 22:10:40 +1100 (EST) (envelope-from peter) Date: Sun, 21 Feb 2010 22:10:40 +1100 From: Peter Jeremy To: freebsd-current@freebsd.org Message-ID: <20100221111040.GA82086@server.vk2pj.dyndns.org> References: <20091128212226.GA9841@server.vk2pj.dyndns.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Q68bSM7Ycu6FN28Q" Content-Disposition: inline In-Reply-To: <20091128212226.GA9841@server.vk2pj.dyndns.org> X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.20 (2009-06-14) Subject: Re: Non-responsive 8.0-RC1 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, 21 Feb 2010 11:10:44 -0000 --Q68bSM7Ycu6FN28Q Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2009-Nov-29 08:22:26 +1100, 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. > >The first time, it stopped responding for about 25 minutes and then >spontaneously corrected itself. I was logged in remotely the whole >time and Ctrl-T was responding throughout (claiming the process was >'runnable'). I tried starteding a second session - which got as far >as reporting the SSH banner I have configured and then did nothing. >The second time lasted about 5 minutes. It occurred again this morning on an 8-STABLE from late January after 21 days of uptime. On a whim, I tried perl -e '$a =3D "x" x 1000000;' and it immediately recovered - so this is just an extreme version of the ZFS slowdown that others have reported. --=20 Peter Jeremy --Q68bSM7Ycu6FN28Q Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (FreeBSD) iEYEARECAAYFAkuBFLAACgkQ/opHv/APuIe08ACgmnsg6gBzFdjlrFsDeL6sbBj8 WgsAn3+c5yAuQOp3uv2pCjepGwHiT4XX =DjNI -----END PGP SIGNATURE----- --Q68bSM7Ycu6FN28Q--