From owner-freebsd-current@FreeBSD.ORG  Wed Dec 22 09:51:29 2004
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id E93E816A4CE
	for <freebsd-current@freebsd.org>;
	Wed, 22 Dec 2004 09:51:29 +0000 (GMT)
Received: from darkness.comp.waw.pl (darkness.comp.waw.pl [195.117.238.136])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 4FD3B43D3F
	for <freebsd-current@freebsd.org>;
	Wed, 22 Dec 2004 09:51:29 +0000 (GMT)
	(envelope-from pjd@darkness.comp.waw.pl)
Received: by darkness.comp.waw.pl (Postfix, from userid 1009)
	id 9563FACAE0; Wed, 22 Dec 2004 10:51:27 +0100 (CET)
Date: Wed, 22 Dec 2004 10:51:27 +0100
From: Pawel Jakub Dawidek <pjd@FreeBSD.org>
To: Daniel Eriksson <daniel_k_eriksson@telia.com>
Message-ID: <20041222095127.GE787@darkness.comp.waw.pl>
References: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA0VcX9IoJqUaXPS8MjT1PdsKAAAAQAAAAGkfN8mmJbkaT9cdiFYXCrQEAAAAA@telia.com>
Mime-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha1;
	protocol="application/pgp-signature"; boundary="zjcmjzIkjQU2rmur"
Content-Disposition: inline
In-Reply-To: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA0VcX9IoJqUaXPS8MjT1PdsKAAAAQAAAAGkfN8mmJbkaT9cdiFYXCrQEAAAAA@telia.com>
User-Agent: Mutt/1.4.2i
X-PGP-Key-URL: http://people.freebsd.org/~pjd/pjd.asc
X-OS: FreeBSD 5.2.1-RC2 i386
cc: freebsd-current@freebsd.org
Subject: Re: geom_gate panic
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
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: Wed, 22 Dec 2004 09:51:30 -0000


--zjcmjzIkjQU2rmur
Content-Type: text/plain; charset=iso-8859-2
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Wed, Dec 22, 2004 at 03:27:35AM +0100, Daniel Eriksson wrote:
+>=20
+> Using geom_gate to mount a geom_stripe array from another machine (hooke=
d up
+> through a crossover cable), the following happens when moving large amou=
nts
+> of data:
+>=20
+> g_vfs_done():ggate0[WRITE(offset=3D59507982336, length=3D131072)]error =
=3D 5
+> ...
+> g_vfs_done():ggate0[WRITE(offset=3D1119618220032, length=3D131072)]error=
 =3D 5
+> g_vfs_done():ggate0[WRITE(offset=3D1062713851904, length=3D16384)]error =
=3D 5
+> g_vfs_done():ggate0[WRITE(offset=3D1101811367936, length=3D49152)]error =
=3D 5

Error number 5 is EIO. GGATE can generate such an error in some situations
(e.g. queue is full). Please, increase debug level to 1
(kern.geom.gate.debug=3D1) and send me debug printfs from before panic.

We can see other serious problem here - UFS cannot handle EIOs properly...

--=20
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

--zjcmjzIkjQU2rmur
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (FreeBSD)

iD8DBQFByUOfForvXbEpPzQRAh4pAJ40F2YpxU/7EVCbIZZEYVReiqJ6MACeJQZl
gOb0L7qxIynxcUfYbTGq3+Q=
=69Yb
-----END PGP SIGNATURE-----

--zjcmjzIkjQU2rmur--