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SubjectRe: Web10g TCP statistics patch - mainlining into kernel?
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From: Ben Hutchings <bhutchings@solarflare.com>
Date: Tue, 29 Jan 2013 17:49:15 +0000

> On Fri, 2013-01-25 at 13:31 -0500, Valdis Kletnieks wrote:
> [...]
>> it's a zero-hit thing for people who don't choose to configure
>> it into their kernel.
> [...]
>
> People with high-overhead changes always say this, but before long
> distributions will be expected to enable it and then everyone pays the
> price. So I think you'll have to work on limiting the run-time overhead
> when it's enabled at compile time but the user doesn't care about it.
> Possibly it can be a run-time option? (I haven't looked at the code and
> don't expect to have time to do so.)

+1

The run time overhead must be zero when the feature is configured into
the kernel, and this requirement is non-negotiable.


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