From owner-freebsd-fs@FreeBSD.ORG Thu Mar 21 11:53:20 2013 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id E5824C91 for ; Thu, 21 Mar 2013 11:53:20 +0000 (UTC) (envelope-from freebsd-listen@fabiankeil.de) Received: from smtprelay05.ispgateway.de (smtprelay05.ispgateway.de [80.67.31.97]) by mx1.freebsd.org (Postfix) with ESMTP id 7AF6595 for ; Thu, 21 Mar 2013 11:53:20 +0000 (UTC) Received: from [78.35.142.252] (helo=fabiankeil.de) by smtprelay05.ispgateway.de with esmtpsa (SSLv3:AES128-SHA:128) (Exim 4.68) (envelope-from ) id 1UIe3U-0002qN-DQ; Thu, 21 Mar 2013 12:53:12 +0100 Date: Thu, 21 Mar 2013 12:53:07 +0100 From: Fabian Keil To: "Reed A. Cartwright" Subject: Re: ZFS question Message-ID: <20130321125307.131a8727@fabiankeil.de> In-Reply-To: References: <20130321044557.GA15977@icarus.home.lan> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/e72goy4LgjDLwcZ_ngRRHDu"; protocol="application/pgp-signature" X-Df-Sender: Nzc1MDY3 Cc: freebsd-fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Mar 2013 11:53:21 -0000 --Sig_/e72goy4LgjDLwcZ_ngRRHDu Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable "Reed A. Cartwright" wrote: > Note that my issue seems to do with an interaction between the CAM > system and the MPS driver in 9.1. Thus it is more than likely > different than what you are experiencing Quartz. At least from your description it's not obvious to me why the problem should be caused by an interaction between CAM and MPS and not by one of the driver-independent ZFS deadlocks. If you haven't already, you might want to have a look at: https://wiki.freebsd.org/AvgZfsDeadlockDebug =20 > Now that ZFS deadman has been incorporated into stable, I'll probably > give a 9.1 (i.e. 9/stable) another try. At least on my system the ZFS deadman doesn't trigger in case of ZFS-internal deadlocks and I don't think it's supposed to either: https://www.illumos.org/issues/3246 Of course knowing whether or not it triggers in your case could still be useful. > Jeremy, I have a question about enabling kernel dumps based on my > current swap config. >=20 > I currently have a 1TB drive split into 4 geli encrypted swap > partitions (Freebsd doesn't like swap partitions over ~250 GB and I > have lots of RAM). These partitions are UFS-swap partitions and are > not backed by any mirroing or ZFSing. >=20 > So, how do I best enable crash dumps? If I need to remove encryption, > I can do that. Crash dumps can be written to any device and temporarily attaching an USB stick might be more convenient than using one of the "UFS-swap" partitions which you'll have to recreate afterwards. Dumping on geli providers should work, but I haven't tested it as I use one-time master keys for swap. Fabian --Sig_/e72goy4LgjDLwcZ_ngRRHDu Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAlFK9KgACgkQBYqIVf93VJ2lmwCgh2To3nMFKJ8VdxtS2cuSWYUf Tp4An3dys3KTujJhY/gnWfjo1tsCQpgi =Z0QM -----END PGP SIGNATURE----- --Sig_/e72goy4LgjDLwcZ_ngRRHDu--