netdev - Re: multi bpf filter will impact performance?

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Message-Id: <20101201.102402.189695333.davem@davemloft.net>
Date:	Wed, 01 Dec 2010 10:24:02 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	hagen@...u.net
Cc:	eric.dumazet@...il.com, xiaosuo@...il.com, wirelesser@...il.com,
	netdev@...r.kernel.org
Subject: Re: multi bpf filter will impact performance?

From: David Miller <davem@...emloft.net>
Date: Wed, 01 Dec 2010 10:18:09 -0800 (PST)

> If people work on the BPF optimizer and BPF JITs in parallel, we'll have
> both ready at the same time.  win++

BTW, the JIT is non-trivial work for us because of non-linear SKBs.
We'd need some kind of helper stub or similar, with a straight line
fast path for the linear case.
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