linux-kernel - Re: [PATCH] net: guard against coalescing packets from buggy network drivers

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Date:	Fri, 25 Apr 2014 18:01:55 +0200
From:	Svenning Sørensen <sss@...omea.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	"David S. Miller" <davem@...emloft.net>,
	<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: Re: [PATCH] net: guard against coalescing packets from buggy network
 drivers


On 25-04-2014 17:43, Eric Dumazet wrote:
>
> If you want a debugging patch, this should happen way before TCP stack
> or even IP stack.
>
> Say you want to use this buggy driver on a router, this code path will
> never bit hit.
>
You are right, of course, there are more effective ways to catch buggy 
drivers.
But they will probably also be much more expensive.
This one is very cheap, being in a relatively cold path, especially 
compared to the memcpy in the same path.

Svenning
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