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Date: Wed, 17 Dec 2014 10:55:53 +0100 From: Michal Kubecek <mkubecek@...e.cz> To: Richard Laager <rlaager@...tel.com> Cc: netdev@...r.kernel.org Subject: Re: Fw: [Bug 82471] New: net/core/dev.c skb_war_bad_offload On Wed, Dec 17, 2014 at 02:44:12AM -0600, Richard Laager wrote: > Previous history of this thread: > http://thread.gmane.org/gmane.linux.network/326672 > > On 2014-11-04 22:57:19, Tom Herbert wrote: > > Using vlan and bonding? vlan_dev_hard_start_xmit called. A possible > > cause is that bonding interface is out of sync with slave interface > > w.r.t. GSO features. Do we know if this worked in 3.14, 3.15? > > I'm seeing the same sort of crash/warning (skb_war_bad_offload). It's > happening on Intel 10 Gig NICs using the ixgbe driver. I'm using bridges > (for virtual machines) on top of VLANs on top of 802.3ad bonding. I'm > using an MTU of 9000 on the bond0 interface, but 1500 everywhere else. > > I'm always bonding two ports: one one system, I'm bonding two ports on > identical one-port NICs; on another system, I'm bonding two ports on a > single two-port NIC. Both systems exhibit the same behavior. > > Everything has worked fine for a couple years on Ubuntu 12.04 Precise > (Linux 3.2.0). It immediately broke when I upgraded to Ubuntu 14.04 > Trusty (Linux 3.13.0). I can also reproduce this using the packaged > version of Linux 3.16.0 on Trusty. Would it be possible that the kernel you are using has da08143b8520 ("vlan: more careful checksum features handling") (and possibly also a9b3ace44c7d and 3625920b62c3) but not db115037bb57 ("net: fix checksum features handling in netif_skb_features()") ? Michal Kubecek -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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