From mboxrd@z Thu Jan 1 00:00:00 1970 From: Loic Dachary Subject: Re: puzzling disapearance of /dev/sdc1 Date: Fri, 18 Dec 2015 17:34:38 +0100 Message-ID: <5674359E.6020006@dachary.org> References: <5672AAD7.8030004@dachary.org> <5672C258.1020700@dachary.org> <5673FE37.8010408@dachary.org> <56743316.1040805@dachary.org> <56743502.4010406@dachary.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="paDcqd0mwiktLO8T76xoE9xeK4thMg7F0" Return-path: Received: from mail2.dachary.org ([91.121.57.175]:52670 "EHLO smtp.dmail.dachary.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932264AbbLRQek (ORCPT ); Fri, 18 Dec 2015 11:34:40 -0500 In-Reply-To: <56743502.4010406@dachary.org> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Ilya Dryomov Cc: Ceph Development This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --paDcqd0mwiktLO8T76xoE9xeK4thMg7F0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Nevermind, got it: CHANGES WITH 214: * As an experimental feature, udev now tries to lock the disk device node (flock(LOCK_SH|LOCK_NB)) while it executes events for the disk or any of its partitions. Applications like partitioning programs can lock the disk device node (flock(LOCK_EX)) and claim temporary device ownership that way; udev will entirely skip all event handling for this disk and its partitions. If the disk was opened for writing, the close will trigger a partition table rescan in udev's "watch" facility, and if needed synthesize "change" events for the disk and all its partitions.= This is now unconditionally enabled, and if it turns out to cause major problems, we might turn it on only for specific devices, or might need to disable it entirely. Device Mapper devices are excluded from this logic. On 18/12/2015 17:32, Loic Dachary wrote: >=20 >>> AFAICT udevd started doing this in v214. >=20 > Do you have a specific commit / changelog entry in mind ? I'd like to a= dd it to the commit message fixing the problem reference. >=20 > Thanks ! >=20 >=20 --=20 Lo=C3=AFc Dachary, Artisan Logiciel Libre --paDcqd0mwiktLO8T76xoE9xeK4thMg7F0 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlZ0NZ4ACgkQ8dLMyEl6F22xpACfZmjQnZp2a6mTUSp0mj13fyiQ 6nUAoJd4kQRV7RJm4vPwsdtF2qtph+OD =0K+k -----END PGP SIGNATURE----- --paDcqd0mwiktLO8T76xoE9xeK4thMg7F0--