From owner-freebsd-bugs@FreeBSD.ORG Mon Jan 25 11:58:14 2010 Return-Path: Delivered-To: freebsd-bugs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DD62E106566B for ; Mon, 25 Jan 2010 11:58:14 +0000 (UTC) (envelope-from peterjeremy@acm.org) Received: from fallbackmx08.syd.optusnet.com.au (fallbackmx08.syd.optusnet.com.au [211.29.132.10]) by mx1.freebsd.org (Postfix) with ESMTP id 61C468FC15 for ; Mon, 25 Jan 2010 11:58:13 +0000 (UTC) Received: from mail12.syd.optusnet.com.au (mail12.syd.optusnet.com.au [211.29.132.193]) by fallbackmx08.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id o0P9pmMW028754 for ; Mon, 25 Jan 2010 20:51:48 +1100 Received: from server.vk2pj.dyndns.org (c122-106-232-148.belrs3.nsw.optusnet.com.au [122.106.232.148]) by mail12.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id o0P9phi8030016 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 25 Jan 2010 20:51:45 +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 o0P9peKT098661; Mon, 25 Jan 2010 20:51:40 +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 o0P9peGq098660; Mon, 25 Jan 2010 20:51:40 +1100 (EST) (envelope-from peter) Date: Mon, 25 Jan 2010 20:51:40 +1100 From: Peter Jeremy To: FreeBSD-gnats-submit@FreeBSD.org, freebsd-bugs@FreeBSD.org Message-ID: <20100125095140.GA98640@server.vk2pj.dyndns.org> References: <201001242023.o0OKNj5p044592@server.vk2pj.dyndns.org> <201001242030.o0OKU5K6030347@freefall.freebsd.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="h31gzZEtNLTqOjlF" Content-Disposition: inline In-Reply-To: <201001242030.o0OKU5K6030347@freefall.freebsd.org> X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.20 (2009-06-14) Cc: Subject: Re: kern/143184: [zfs] [lor] zfs/bufwait LOR X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 Jan 2010 11:58:14 -0000 --h31gzZEtNLTqOjlF Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Archive followup in -stable: On 2010-Jan-25 11:24:11 +0200, Kostik Belousov wrote: >On Mon, Jan 25, 2010 at 07:07:00PM +1100, Peter Jeremy wrote: >> I had the following crop up recently in 8-STABLE/amd64 from end of >> November. It's been reported as kern/143184. >Basically, page containing the buffer for read(2) is swapped out. >This causes page fault in copyout(9) and entry into vm subsystem >while zfs vnode lock is held. > >If the buffer is backed by e.g. UFS vnode instead of anonymous >memory, you would get UFS/zfs LOR. > >The problem is generic, I am working on the solution in collaboration >with Peter Holm, basing on the Jeff Roberson idea. --=20 Peter Jeremy --h31gzZEtNLTqOjlF Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (FreeBSD) iEYEARECAAYFAktdaawACgkQ/opHv/APuIeonwCgp1EIoAGldB1BjSpDlmC3Pr40 pv4AnRukj/ieQrITLKCn33yzGcgeWNC6 =+uuT -----END PGP SIGNATURE----- --h31gzZEtNLTqOjlF--