netdev - Re: [Q/RFC] BPF use in broader scope

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Message-Id: <20120329.044324.1881363222808734381.davem@davemloft.net>
Date:	Thu, 29 Mar 2012 04:43:24 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	jpirko@...hat.com
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org,
	bhutchings@...arflare.com, shemminger@...tta.com, matt@...abs.org
Subject: Re: [Q/RFC] BPF use in broader scope

From: Jiri Pirko <jpirko@...hat.com>
Date: Thu, 29 Mar 2012 10:31:49 +0200

> Thu, Mar 29, 2012 at 10:02:25AM CEST, eric.dumazet@...il.com wrote:
>>On Thu, 2012-03-29 at 09:54 +0200, Jiri Pirko wrote:
>>
>>> Yep, I'm aware. I must admit that the JIT code scares me a litte :(
>>> 
>>
>>If you add a new XOR instruction in interpreter only, JIT compiler will
>>automatically aborts, so no risk.
>>
>>Each arch maintainer will add the support for the new instructions as
>>separate patches.
>>
>>So you can focus on net/core/filter.c file only.
>>
> 
> Ok - I can do this for 2). But for 3) JITs need to be modified. So I
> would like to kindly ask you and Matt if you can do this modification so
> bpf_func takes pointer to mem (scratch store) as second parameter. I'm
> sure it's very easy for you to do.

The ARM JIT just went into Linus's tree as well.
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