From mboxrd@z Thu Jan 1 00:00:00 1970 From: Doug Ledford Subject: 4.4-rc7 failure report Date: Mon, 28 Dec 2015 16:53:45 -0500 Message-ID: <5681AF69.4040204@redhat.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="uIgT6Qm5ouFdK7hCQPA14VFtcdEApEDUR" To: David Miller , David Miller , netdev Return-path: Received: from mx1.redhat.com ([209.132.183.28]:37849 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752887AbbL1Vxr (ORCPT ); Mon, 28 Dec 2015 16:53:47 -0500 Sender: netdev-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --uIgT6Qm5ouFdK7hCQPA14VFtcdEApEDUR Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Dave, The 4.4-rc7 kernel is failing for me. In my case, all of my vlan interfaces are failing to obtain a dhcp address using dhclient. I've tried a hand built 4.4-rc7, and the Fedora rawhide 4.4-rc7 kernel, both failed. I've tried NetworkManager and the old SysV network service, both fail. I tried a working dhclient from rhel7 on the Fedora rawhide install and it failed too. Running tcpdump on the interface shows the dhcp request going out, and a dhcp response coming back in. Running strace on dhclient shows that it writes the dhcp request, but it never recvs a dhcp response. If I manually bring the interface up with a static IP address then I'm able to run typical IP traffic across the link (aka, ping). It would seem that when dhclient registers a packet filter on the socket, that filter is preventing it from ever getting the dhcp response. The same dhclient works on any non-vlan interfaces in the system, so the filter must work for non-vlan interfaces. Aside from the fact that the interface is a vlan, we also use a priority egress map on the interface, and we use PFC flow control. Let me know if you need anymore to debug the issue, or email me off list and I can get you logins to my reproducer machines. --=20 Doug Ledford GPG KeyID: 0E572FDD --uIgT6Qm5ouFdK7hCQPA14VFtcdEApEDUR 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 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJWga9pAAoJELgmozMOVy/dAkwQAIo0pVotrm56cG8L9ZQnFO93 iu91kj5z8zEBnj3iAsantKZFUJjUzMKbgtlUUcGCDl3L4zLTkS8IPiJMhqb8/Qhu HF0iIP7fnA1VTt+O/TJLi04Zk1OV9cNWWjxTu+rgZ9mB7jkntWNh/wkFIpCPYnxZ Fru0xzUSbyPjqsCACJO+MHpuKqTmXcIRzeYZsdKwXpf/bHpMsqSWZJQu0gveHWUb D6jSHTmg1Vg9X9aEX02s5s1ZQc/nb6HJEqq4nfMX+UXjr98UPKtLkmn6N/W/G7y2 NbzGNJXEzlZZN5jldr0+mqlMCJrvvVAy7QVImd9xJHRLmSF0nYEGRIwwrEslmL9x 8iyFPG3JUOuEVe5g1GysF0syshNG2Qc8sc5e4HbaqkNhhddjCQ4V+0bcixpNonuG vFVGJ8xR94S2/7PwWGG37v00tDkTjcsB0Bexyb7ZNYVTQPba5Vt2feAd7Z/eoJO2 BbVVhr3vtz845tp6BUoq+tTMX8NKGv8AhYaxxga+1z/tJeUgHG8+5jm8e7wSCg7p bSyr7Bzgv8UhEhZaca8APdbOqEKHJcUBCOe/9cJQH5gmEY6No7PsBt31B16Yj51O 1rjUtMDmL06ETqzDxxM1Q9LHX+kZmMsYGY+AE+SABcFdOlog1Fzc03iU9eNJZhjv sfejXhVHA6jX40C/PF05 =aVjq -----END PGP SIGNATURE----- --uIgT6Qm5ouFdK7hCQPA14VFtcdEApEDUR--