linux-kernel - Re: [PATCH 08/24] net, diet: Make TCP metrics optional

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Date:	Tue, 6 May 2014 13:37:43 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	josh@...htriplett.org, David Miller <davem@...emloft.net>,
	andi@...stfloor.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, tom.zanussi@...ux.intel.com
Subject: Re: [PATCH 08/24] net, diet: Make TCP metrics optional

> In 1024 bytes of memory, and keep an efficient kernel to handle
> arbitrary number of sockets using the venerable and slow BSD socket api.

I agree running in 1024 bytes would be challenging.

> Adding ~1000 lines of code to save few KB was the point I gave up.

You're refering to fib_list? It currently has some duplicated code
(this could/should be fixed). Or we could drop it, I suppose, if really
everyone hates it.

(I thought it was a cute idea, but I'm biased :-)

Total it is saving 350k, about 30% of the total text size of the mini kernel
(plus some dynamic savings) with networking.

I would be happy to fix any reasonable objection. But fundamental 
"I don't care about anything smaller than my smart phone" type arguments
are not particularly constructive.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only
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