From owner-freebsd-fs@FreeBSD.ORG Tue Aug 28 06:36:01 2012 Return-Path: Delivered-To: freebsd-fs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 349F2106567A for ; Tue, 28 Aug 2012 06:36:01 +0000 (UTC) (envelope-from matthew@FreeBSD.org) Received: from smtp.infracaninophile.co.uk (smtp6.infracaninophile.co.uk [IPv6:2001:8b0:151:1:3cd3:cd67:fafa:3d78]) by mx1.freebsd.org (Postfix) with ESMTP id 8C1CF8FC16 for ; Tue, 28 Aug 2012 06:36:00 +0000 (UTC) Received: from seedling.local (host86-182-42-128.range86-182.btcentralplus.com [86.182.42.128]) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.14.5/8.14.5) with ESMTP id q7S6ZsuK093162 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO); Tue, 28 Aug 2012 07:35:55 +0100 (BST) (envelope-from matthew@FreeBSD.org) X-DKIM: OpenDKIM Filter v2.5.2 smtp.infracaninophile.co.uk q7S6ZsuK093162 Authentication-Results: smtp.infracaninophile.co.uk/q7S6ZsuK093162; dkim=none (no signature); dkim-adsp=none X-Authentication-Warning: lucid-nonsense.infracaninophile.co.uk: Host host86-182-42-128.range86-182.btcentralplus.com [86.182.42.128] claimed to be seedling.local Message-ID: <503C66C2.5010209@FreeBSD.org> Date: Tue, 28 Aug 2012 07:35:46 +0100 From: Matthew Seaman User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:14.0) Gecko/20120713 Thunderbird/14.0 MIME-Version: 1.0 To: Guido Falsi References: <503C5F2A.701@FreeBSD.org> <503C633B.2070508@madpilot.net> In-Reply-To: <503C633B.2070508@madpilot.net> X-Enigmail-Version: 1.4.4 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig0D058A0B5A8D03E22B6715A5" X-Virus-Scanned: clamav-milter 0.97.5 at lucid-nonsense.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=2.5 required=5.0 tests=AWL,BAYES_00,RCVD_IN_PBL, RCVD_IN_RP_RNBL, RCVD_IN_SORBS_DUL, RDNS_DYNAMIC, SPF_SOFTFAIL autolearn=no version=3.3.2 X-Spam-Level: ** X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on lucid-nonsense.infracaninophile.co.uk Cc: freebsd-fs@FreeBSD.org Subject: Re: ZFS snapshot Folder Disappearing X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Aug 2012 06:36:01 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig0D058A0B5A8D03E22B6715A5 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: quoted-printable On 28/08/2012 07:20, Guido Falsi wrote: >> >> There's a PR for this somewhere (not created by me), but I can't find = it >> in my records right now. >> >=20 > http://www.freebsd.org/cgi/query-pr.cgi?pr=3Dkern/156781 That's the one. > I got hit by this a few times too. Ti me it looks like it's easier to > get this problem on more low spec machines(low spec regarding ZFS, so > anything under 3-4 GiB ram is on the low side, for example). My machine has 8GB RAM which I wouldn't call low spec particularly. > Using nullfs across snapshots did trigger this easily. I did that to > have a nullfs mounted snapshot of the whole filesystem structure. I'm > using read only zfs clones for that now. Interesting. I do have certain ZFSes null-mounted into a jail. I wonder if that's a common factor? Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. PGP: http://www.infracaninophile.co.uk/pgpkey --------------enig0D058A0B5A8D03E22B6715A5 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.16 (Darwin) Comment: Using GnuPG with Mozilla - http://www.enigmail.net/ iEYEARECAAYFAlA8ZsoACgkQ8Mjk52CukIx0TwCglYv9Kq5C++TXB7Ntrz5jaJHu fLEAnRH1smzDdgSGzREX3raFJu+99hsK =u7ZA -----END PGP SIGNATURE----- --------------enig0D058A0B5A8D03E22B6715A5--