From owner-svn-src-all@freebsd.org Tue Jan 19 18:07:20 2016 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id A46C0A87F4E for ; Tue, 19 Jan 2016 18:07:20 +0000 (UTC) (envelope-from shawn.webb@hardenedbsd.org) Received: from mail-yk0-x234.google.com (mail-yk0-x234.google.com [IPv6:2607:f8b0:4002:c07::234]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 5ECE01C5F for ; Tue, 19 Jan 2016 18:07:20 +0000 (UTC) (envelope-from shawn.webb@hardenedbsd.org) Received: by mail-yk0-x234.google.com with SMTP id v14so563838722ykd.3 for ; Tue, 19 Jan 2016 10:07:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hardenedbsd-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; bh=wkL+551+nF8YOBIx8OjiA1OZx6Urmn6GEDFC7GSnlqs=; b=fbkbAggS18Ok0Icm4YquBsA0wu3Ecg3nfwxH99I7KG9w2Bmw+jOo9nHwYayrKlVwkd mG+/hP5VFRYVqotRJ/vcxH/o6AI+klJRJgIm5615WroA5wBpiRr6f1gtabB2Iiaaic/k PsK4S1LJASCk0zLuGzj4Say9gtKktXoBzIpoVNlOFam2kKMqjyhI588CV1iEe1YpqXKM LsLQLpqqLoMheWB69dHdDirypaRchWvQ1TyUHP/vE2hhSTdRYZEBCUmjw5yzChQmTFk6 yfXAteoNLaQ0Y2+GI2+jgYwnlYD8UseHd7BnxwKMIwFqX+fn5b8o4G6FowCeIzHmlayh Ss3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-type:content-disposition:in-reply-to :user-agent; bh=wkL+551+nF8YOBIx8OjiA1OZx6Urmn6GEDFC7GSnlqs=; b=bMqCF77SM/I3dZF29ZVZbfkKi7LY+WLARsrC4jt0iMI3vome3BCCmbY89OfgIna/mD EFKxZ0VtJQSRPTuXK+2zLazBLIUfpU/MYhUeLSonhnc9L3pp8PR4c3V9ECJwH2wuN5SE 4n65UP66EEoKGPPYWrt6ZvOEg6PZp6ZMUhD8DGUkqx7rseYSNYGdpVscNJPHtliDbyFr TeChNzS3SEuhLonLKzKl+ZS9wALhq5xRHXV3WnUze/UHLzA38IO5OJ+roWLEjnRsRoi6 DSc2TGH6bIzrdWXRJCwLGaR0VXh/Se5j/D32lnl+FepBeqPP4PII1XFOiCoW4us/0+iT tp4A== X-Gm-Message-State: ALoCoQkO4YMGq825e2j3rA/KIme0a/lbi/H+gOrBUlL8Koo4mAUz/JP4ZKpPuAFOsdZCWvtsr/iY753bKccuhIxCwS9u9wA//w== X-Received: by 10.129.153.129 with SMTP id q123mr20296426ywg.281.1453226839473; Tue, 19 Jan 2016 10:07:19 -0800 (PST) Received: from mutt-hardenedbsd ([63.88.83.105]) by smtp.gmail.com with ESMTPSA id h187sm22617240ywc.0.2016.01.19.10.07.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 19 Jan 2016 10:07:18 -0800 (PST) Date: Tue, 19 Jan 2016 13:07:15 -0500 From: Shawn Webb To: Alan Somers Cc: Kurt Lidl , "svn-src-head@freebsd.org" , "svn-src-all@freebsd.org" , "src-committers@freebsd.org" Subject: Re: svn commit: r294329 - in head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs: . sys Message-ID: <20160119180715.GA98067@mutt-hardenedbsd> References: <201601191700.u0JH0P6k061610@repo.freebsd.org> <569E6DA0.9010300@pix.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="dDRMvlgZJXvWKvBx" Content-Disposition: inline In-Reply-To: X-Operating-System: FreeBSD mutt-hardenedbsd 11.0-CURRENT-HBSD FreeBSD 11.0-CURRENT-HBSD X-PGP-Key: http://pgp.mit.edu/pks/lookup?op=vindex&search=0x6A84658F52456EEE User-Agent: Mutt/1.5.24 (2015-08-30) X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 Jan 2016 18:07:20 -0000 --dDRMvlgZJXvWKvBx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jan 19, 2016 at 10:20:38AM -0700, Alan Somers wrote: > On Tue, Jan 19, 2016 at 10:08 AM, Kurt Lidl wrote: > > Removing the ability to run different zpools on top of a zvol is > > a significant reduction in functionality of the entire system, and a hu= ge > > violation of the POLA. >=20 > The thing is, it never really worked in the first place. Panics and > deadlocks are so frequent that I don't think the feature was usable > for anybody. I actively use this every day and will be making even more use of it in the very near future. I haven't had a single kernel panic. I have had deadlocks at shutdown, but since it's a laptop and I'm sitting right in front of it, it's not a big deal. I'd say fix the underlying problem, don't prevent people from getting work done. >=20 > > > > At the very least, can you not add a sysctl that allows the > > dangerous behavior (even if it defaults to off)? Myself > > and certainly others rely on having being able to use a zpool > > installed into a zvol for hosting bhyve virtual machines. >=20 > Your use case should be unaffected. The guest has a different ZFS > instance than the host, so it should work just fine. Please let me > know if you have problems. --=20 Shawn Webb HardenedBSD GPG Key ID: 0x6A84658F52456EEE GPG Key Fingerprint: 2ABA B6BD EF6A F486 BE89 3D9E 6A84 658F 5245 6EEE --dDRMvlgZJXvWKvBx Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJWnntQAAoJEGqEZY9SRW7u0LcQAJyUonXZt0/aborbAkk6Jv6S +rkb9qTd8AHZpAeoB3A7TM9e0MNmCgvTXhKuxIJIaJkTv5zjQAtmoIUq4Y10bh+E DgHnTP8gH9eIPtR5QaqnXmIRMy+6ZeeUhS1pXebOERngcJ/n4Pb8zJgvoOYVlr3H EId8vLqgkrVpDx3UxT5RHdFZ9UKYO+RbC8LqzSUF5jHRQsSo9PLtvKzCDY78flOC DY0C1dm6ie8hCYOENFKNoZ8iFK+ZzzP+voPUO3epdfylWjWukET9yvwEK33jPrOa waVzMPfroTVE5k7Dhz99P+GtkkBtjK6fWhXQgqnuMIooQy5NJGvIfrFkgwNl4c+a 3zhbR3VlBTOGd5t+4BkV7wQO7fm05h2CQekpNRHbhmAt1fql3DlkqFILdekx17Y5 cI03hnn6QD1bRPY4y7AIVtw0/hHTAZL9iA0XO6TzGTOWeNEe8pLbltaYi/G6eLEy fAIKQ+/YhpEHwKwkAuplQpBxeX3ihEv4u9giOI4Sp5mbkymZPagjhUj71kCbfA82 TJosm8Zkyru5MuchatOKiVsNUjHQ5esoHY5HAEas7H4GryqSIGUAAZmurgGjHPoB wnJD+GQeSfXDa8Fofvhd+KWY2xeCLdU6OWHKoKeiVQH1ehep5kUiqRu8sNUMDGcQ UDTvxkvVNbAQa4KSt4NX =YXCt -----END PGP SIGNATURE----- --dDRMvlgZJXvWKvBx--