netdev - Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruction in RCU.

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Date:	Fri, 22 Aug 2008 20:47:30 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	hadi@...erus.ca, kaber@...sh.net, netdev@...r.kernel.org,
	johannes@...solutions.net, linux-wireless@...r.kernel.org
Subject: Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruction in RCU.

On Fri, Aug 22, 2008 at 03:42:17AM -0700, David Miller wrote:
> 
> I had another idea in the back of my head that I wanted to mention.
> 
> The SKB has a hash, and sources set the hash.  It doesn't matter
> where in the stack it comes from.

Yes this sounds great!
 
> So in the simplest case for forwarding, the RX side puts the RSS
> hash or whatever into this SKB hash location.

This works on all the routers.

> Then, taking things to the next level, protocols set hashes for
> locally created packets.  And this leads to being able to delete
> the simple_tx_hash() code entirely and also we won't have to add
> support for every protocol on the planet to that function. :)

And this takes care of the hosts.

Best of all it's per flow and we don't even need to add any new
infrastructure :)

Thanks,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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