netdev - Re: [PATCH net-next] sctp: fix compile issue with disabled CONFIG_NET

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Message-ID: <1345145802.2832.6.camel@bwh-desktop.uk.solarflarecom.com>
Date:	Thu, 16 Aug 2012 20:36:42 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Ulrich Weber <ulrich.weber@...hos.com>, <davem@...emloft.net>,
	<netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] sctp: fix compile issue with disabled
 CONFIG_NET_NS

On Thu, 2012-08-16 at 11:58 -0700, Eric W. Biederman wrote:
> Ulrich Weber <ulrich.weber@...hos.com> writes:
> 
> > struct seq_net_private has no struct net
> > if CONFIG_NET_NS is not enabled
> 
> My mistake.
> 
> Reviewed-by: "Eric W. Biederman" <ebiederm@...ssion.com>
> 
> > Signed-off-by: Ulrich Weber <ulrich.weber@...hos.com>
> 
> Ulrich do you get any performance advantage by disabling the network
> namespace?
> 
> I am wondering if there is any benefit to keeping it possible to disable
> the network namespace?
> 
> The original reason for the option was so that distributions and
> other who wanted to avoid new code could protect their users, and
> that reasons seems to have long since passed.
[...]

Network namespaces are now used by common applications such as Chrome/
Chromium and vsftpd (which flushed out some of the early implementation
problems).  They undoubtedly have some overhead that some users would
like to avoid, but I wouldn't expect distributions to disable the
option.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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