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Date: Tue, 12 Aug 2008 07:50:58 -0400 From: Andrew Gallatin <gallatin@...i.com> To: David Miller <davem@...emloft.net> CC: herbert@...dor.apana.org.au, netdev@...r.kernel.org, brice@...i.com Subject: Re: LRO restructuring? David Miller wrote: > From: Andrew Gallatin <gallatin@...i.com> > Date: Mon, 11 Aug 2008 09:30:33 -0400 > >> Last, have you considered simply allowing "inexact" forwarding, where >> the ingress NIC is doing LRO and the egress nic is doing TSO? You >> loose exact framing information (eg, what you emit might not be framed >> exactly as you receive it), but you can still do filtering, and the >> host overhead is very low. > > Intermediate nodes are not supposed to change the transport layer > checksum if at all possible, especially on routers. Indeed. Nor should they change lengths, or anything else. Everything about this "inexact" forwarding is illegal as hell. However, you have to admit that it is an interesting hack :) Drew -- 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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