netdev - Re: [RFC net-next 0/6] tcp: remove prequeue and header prediction

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Message-Id: <20170731.143818.699405961193908260.davem@davemloft.net>
Date:   Mon, 31 Jul 2017 14:38:18 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     ycheng@...gle.com, ncardwell@...gle.com, fw@...len.de,
        netdev@...r.kernel.org, soheil@...gle.com, weiwan@...gle.com,
        brakmo@...com, lorenzo@...gle.com, vanj@...gle.com
Subject: Re: [RFC net-next 0/6] tcp: remove prequeue and header prediction

From: Eric Dumazet <edumazet@...gle.com>
Date: Mon, 31 Jul 2017 13:22:22 -0700

> On Mon, Jul 31, 2017 at 1:04 PM, Yuchung Cheng <ycheng@...gle.com> wrote:
>> by the time these devices use 4.12 kernels they are likely powerful
>> enough to make header prediction irrelevant...
> 
> Also note that TCP stack complexity has increased a lot, I seriously
> doubt anyone could notice any difference.
> 
> On small devices, the major cost is the wakeup of the cpu to process
> one frame before going back to idle...

I agree with Yuchung and Eric on all counts.