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Date: Thu, 11 Jul 2013 22:37:37 +0100 From: Ben Hutchings <bhutchings@...arflare.com> To: Ben Greear <greearb@...delatech.com> CC: netdev <netdev@...r.kernel.org> Subject: Re: skb_warn_bad_offload related to IPv6 in 3.9.9+ On Thu, 2013-07-11 at 11:52 -0700, Ben Greear wrote: > This kernel has local patches applied...but I don't think it has anything > that would cause this.... > > The wanlink module is something we added. It is now GPL, but code is > not upstream. I don't think it's in directly related to the splat though... > > Only saw one splat, and system remains stable as far as we can tell. > > ------------[ cut here ]------------ > WARNING: at /home/greearb/git/linux-3.9.dev.y/net/core/dev.c:2179 skb_warn_bad_offload+0xc2/0xcb() > Hardware name: X7DBU > e1000e: caps=(0x00000000700003a9, 0x0000000000000000) len=2942 data_len=1428 gso_size=1428 gso_type=16 ip_summed=1 [...] The skb requires TSO, which requires that ip_summed = CHECKSUM_PARTIAL. But ip_summed = CHECKSUM_UNNECESSARY. To me, this suggests that the receiving device i.e. wanlink has some kind of broken LRO that can't be turned off... Ben. -- Ben Hutchings, Staff Engineer, Solarflare Not speaking for my employer; that's the marketing department's job. They asked us to note that Solarflare product names are trademarked. -- 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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