From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933890AbcBZWOI (ORCPT ); Fri, 26 Feb 2016 17:14:08 -0500 Received: from outbound.smtp.vt.edu ([198.82.183.121]:45219 "EHLO omr2.cc.vt.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752825AbcBZWOG (ORCPT ); Fri, 26 Feb 2016 17:14:06 -0500 X-Mailer: exmh version 2.8.0 04/21/2012 with nmh-1.6+dev To: Stanislav Brabec Cc: Al Viro , "Austin S. Hemmelgarn" , linux-kernel@vger.kernel.org, Jens Axboe , Btrfs BTRFS , David Sterba Subject: Re: loop subsystem corrupted after mounting multiple btrfs sub-volumes From: Valdis.Kletnieks@vt.edu In-Reply-To: <56D0BCFC.5020302@suse.cz> References: <56CF5490.7040102@suse.cz> <56D04630.1020809@gmail.com> <56D0743F.9040102@suse.cz> <56D07FAF.3080605@gmail.com> <20160226175311.GC17997@ZenIV.linux.org.uk> <56D0A38B.3050701@suse.cz> <56D0B007.2050106@gmail.com> <20160226203010.GD17997@ZenIV.linux.org.uk> <56D0BCFC.5020302@suse.cz> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1456524057_2415P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Fri, 26 Feb 2016 17:00:57 -0500 Message-ID: <52677.1456524057@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1456524057_2415P Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable On Fri, 26 Feb 2016 22:00:44 +0100, Stanislav Brabec said: > Well, it seems to be safe, even if the loop device was not allocated by= =20 > mount(8) itself, as > ioctl(fd, LOOP_CLR_FD) > never returns EBUSY: The fact you don't get an EBUSY doesn't mean it's actually safe.... --==_Exmh_1456524057_2415P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Exmh version 2.5 07/13/2001 iQIVAwUBVtDLGQdmEQWDXROgAQLILQ/+PNCFSQDnMpcHHxQeulLX6xgnq3xKSv3I YQIgsZHtBW8KK7b6Hty9/VwmQXWGXC8L5PAG8NNT0nSU3VNmeY/EYEdvpmkGP6Zn tMrZgLMQeULqkxVo5ELAWfgXiB2Zec3/PjGNJey9PG+fzkQBv0/u2Mx0UiNH7txE Izy5gci+Le4E9DEWaXyWapxjKOiOztV5KJf1MuPQDG6gYV4BB0Gb0zvXq3z4jpNi ZkdM/JIKbP3vPYt5UmBRSrMa2N6WnelEgNrY69Au5LrOebJ/c8rPo62LBjbbnvNN A3kL0UErG2/Dv/sf1kbto1OXFo95HpfJwZZzjfBTTibEZVjHtjT9R06GhXxLlyu3 7KkQ4hJxVLwDASn+pMuI8yfb5jdeLjB7Z5QNEHF70s5DaoYdfCEkVvbqEWQ47aS/ HGxASGDy5XjbTf9BFlq5xOJ+FeFpwq9ntaYl6sNPDISaujbv+ajE6wj5CJPc0H6Q jtjaUjoyeBaqbO3zKuWZ6dd4ixLvWqigRNaPl/jjhR/LLg2XKqyvaOrIW3JBZaNA MAk1lW1q8/sLIlyG9fhiu32SLKl9HFAick2kV1Vbj8KVPu+SQc+UXKM9RzET++WQ RxYKGLO2dETUmGavQaN8vN63gzJCLIC7/Vfvt6Rs1L8zNF4n9u4N7sAqMkNbJVMi j2vbjnA/4rM= =LG2F -----END PGP SIGNATURE----- --==_Exmh_1456524057_2415P--