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Date: Thu, 16 Apr 2015 14:00:43 +0100
From: Tim Deegan <tim@xen.org>
To: George Dunlap <george.dunlap@eu.citrix.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
        Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
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        Felipe Franciosi <felipe.franciosi@citrix.com>,
        Christoffer Dall <christoffer.dall@linaro.org>,
        David Vrabel <david.vrabel@citrix.com>
Subject: Re: [Xen-devel] "tcp: refine TSO autosizing" causes performance
 regression on Xen
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At 12:39 +0100 on 16 Apr (1429187952), George Dunlap wrote:
> Your comment lists three benefits:
> 1. better RTT estimation
> 2. faster recovery
> 3. high rates
> 
> #3 is just marketing fluff; it's also contradicted by the statement that
> immediately follows it -- i.e., there are drivers for which the
> limitation does *not* give high rates.

AFAICT #3 is talking about throughput _under TCP_, where inflating the
RTT will absolutely cause problems.

Tim.
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