netdev - Re: SO_REUSEPORT - can it be done in kernel?

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Message-ID: <20110302073123.GA18443@gondor.apana.org.au>
Date:	Wed, 2 Mar 2011 15:31:23 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Tom Herbert <therbert@...gle.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Thomas Graf <tgraf@...radead.org>,
	David Miller <davem@...emloft.net>, rick.jones2@...com,
	wsommerfeld@...gle.com, daniel.baluta@...il.com,
	netdev@...r.kernel.org
Subject: Re: SO_REUSEPORT - can it be done in kernel?

On Tue, Mar 01, 2011 at 11:12:29PM -0800, Tom Herbert wrote:
>
> Probably need to set skb->ooo_okay (for UDP etc.) also so that XPS
> will change queues.

Hmm, not quite.  We still want to maintain packet ordering from
the same CPU.  That is, if I do two sendmsg calls from the same
CPU, they should go into the same queue in that order.

So this shouldn't just be a knob that says whether we can pick
queues at random.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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