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To: "Chandran, Sugesh" <sugesh.chandran@intel.com>,
 "Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
 Stephen Hemminger <stephen@networkplumber.org>
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Cc: Yuanhan Liu <yuanhan.liu@linux.intel.com>, "dev@dpdk.org" <dev@dpdk.org>, 
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From: Olivier Matz <olivier.matz@6wind.com>
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Date: Wed, 8 Jun 2016 15:02:26 +0200
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Subject: Re: [dpdk-dev] about rx checksum flags
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Hi,

On 06/08/2016 10:22 AM, Chandran, Sugesh wrote:
>>> I guess the IP checksum also important as L4. In some cases, UDP
>>> checksum is zero and no need to validate it. But Ip checksum is
>>> present on all the packets and that must be validated all  the time.
>>> At higher packet rate, the ip checksum offload can offer slight performance
>> improvement. What do you think??
>>>
>>
>> Agree, in some situations (and this is even more true with packet types /
>> smartnics), the application could process without accessing the packet data if
>> we keep the IP cksum flags.
> [Sugesh] True, If that's the case, Will you considering to implement IP
> checksum flags as well along with L4?
> As you said , this will be useful when we offload packet lookup itself into the NICs(May be
> when using Flow director) ? 

Yes, I plan to implement the same rx status flags (good, bad, unknown,
none) for rx IP checksum too.

Regards,
Olivier