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Date: Thu, 7 Aug 2014 09:36:51 -0700
From: Stephen Hemminger <stephen@networkplumber.org>
To: "Czaus, Tomasz" <tomasz.czaus@intel.com>
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Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] One pkt in mbuf chain - virtio pmd driver
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On Thu, 7 Aug 2014 06:19:58 +0000
"Czaus, Tomasz" <tomasz.czaus@intel.com> wrote:

> Hello,
> 
> Does virtio pmd driver support scenario when a frame fits in mbuf chain, this means all headers (eth/ipv4/tcp) are located in first mbuf and user data is located in next mbuf. I have asked the same question on dpdk-ovs mailing group, here is a thread and more details:
> 
> https://lists.01.org/pipermail/dpdk-ovs/2014-August/001557.html
> 
> Best Regards,
> Tomasz Czaus

Existing DPDK 1.7 virtio driver does not.
I wrote a virtio DPDK driver (before the 1.6 one) that does handle it, so it is possible.

I have some patches to handle multi-part mbuf and messages, based on backport
from that driver but they are untested.