netdev - Re: multi bpf filter will impact performance?

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Message-Id: <20101201.104450.183053379.davem@davemloft.net>
Date:	Wed, 01 Dec 2010 10:44:50 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	hagen@...u.net, xiaosuo@...il.com, wirelesser@...il.com,
	netdev@...r.kernel.org
Subject: Re: multi bpf filter will impact performance?

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 01 Dec 2010 19:24:53 +0100

> A third work in progress (from my side) is to add a check in
> sk_chk_filter() to remove the memvalid we added lately to protect the
> LOAD M(K).

I understand your idea, but the static checkers are still going to
complain.  So better add a huge comment in sk_run_filter() explaining
why the checker's complaint should be ignored :-)
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