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

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Message-ID: <20110226024848.GA20993@gondor.apana.org.au>
Date:	Sat, 26 Feb 2011 10:48:48 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	rick.jones2@...com, tgraf@...radead.org, therbert@...gle.com,
	wsommerfeld@...gle.com, daniel.baluta@...il.com,
	netdev@...r.kernel.org
Subject: Re: SO_REUSEPORT - can it be done in kernel?

On Fri, Feb 25, 2011 at 06:12:44PM -0800, David Miller wrote:
> 
> We take the lock unconditionally because we essentially have to after
> UDP takes on the socket buffer accounting facilities similar to TCP.

Well I just checked out the history tree (2.6.12) and it too had
the unconditional lock on the send path.  So this predates the
system-wide buffer limit change.

I'm looking at redoing this and the bulk of the work is going to
be restructuring ip_append_data/ip_push_pending_frames so that it
doesn't store the states in sk/inet_sk.

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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