From owner-freebsd-stable@freebsd.org Sun Sep 23 09:13:48 2018 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D4CEC10B154D for ; Sun, 23 Sep 2018 09:13:48 +0000 (UTC) (envelope-from stb@lassitu.de) Received: from gilb.zs64.net (gilb.zs64.net [IPv6:2a00:14b0:4200:32e0::1ea]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "gilb.zs64.net", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 6E291960C1 for ; Sun, 23 Sep 2018 09:13:48 +0000 (UTC) (envelope-from stb@lassitu.de) Received: by gilb.zs64.net (Postfix, from stb@lassitu.de) id 605842000F3 for ; Sun, 23 Sep 2018 09:13:46 +0000 (UTC) From: Stefan Bethke Content-Type: multipart/signed; boundary="Apple-Mail=_31FDEA5D-08EF-49E1-8449-FF2D6285DFDE"; protocol="application/pgp-signature"; micalg=pgp-sha512 Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) Subject: if_bridge and CARP causes hangs Message-Id: Date: Sun, 23 Sep 2018 11:13:35 +0200 To: FreeBSD Stable X-Mailer: Apple Mail (2.3445.9.1) X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 23 Sep 2018 09:13:49 -0000 --Apple-Mail=_31FDEA5D-08EF-49E1-8449-FF2D6285DFDE Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 I=E2=80=99ve just stumbled on this problem, which seems to be quite old = and still unresolved. https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D200319 As a quick summary: if you configure CARP on an if_bridge interface, the = CARP state changes will (always/with a high probability) create a = deadlock between CARP and the if_bridge code, leading to the machine = becoming unresponsive. There is a suggested patch, but work on it seems to be very slow: https://reviews.freebsd.org/D3133 I would love to see a fix in 11-stable or 12.0. Is there something I can = do to help move this forward? Regards, Stefan -- Stefan Bethke Fon +49 151 14070811 --Apple-Mail=_31FDEA5D-08EF-49E1-8449-FF2D6285DFDE Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQEzBAEBCgAdFiEEJ+hF98o4r3eU/HiPD885WK4W4sEFAlunWT8ACgkQD885WK4W 4sFOQAf/ZjMbkRtiXV9wCnfwbvy9R9+U7JrmjNy/ZV4rI7H7eEiCW2+YxEcfQsoM be7SDgcH3zAKXvWPWseVm/gIPCaHJNVq4dOr+xn0w6z2VoT0Y6gcpqgkddiuxQjF mNm8QQM+E34PmhIoL2HG6VWkvQvDAZqLMnrWSzorFZrJM9eFI95SCxxVFfuWGZ5e kpKjayAM+R7ocKbNOaZXu9ZzN8wDVj0uJzYULtEd7UDKKjhQEBLlvgGffWtqtMNW WzjycEILQfYtFXMEgsCnZSsiGm5P7L7u1I3MIUZdIJmIM7oqgh6ed50BKuUxo0JR Hjae78qyBoO2nRK+2r9B0vnyavErlg== =QmB8 -----END PGP SIGNATURE----- --Apple-Mail=_31FDEA5D-08EF-49E1-8449-FF2D6285DFDE--