linux-kernel - Re: [patch 0/4] [resend] Add configuration options to disable features

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Message-Id: <1217620043.3454.492.camel@pmac.infradead.org>
Date:	Fri, 01 Aug 2008 20:47:23 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Josh Boyer <jwboyer@...il.com>,
	Ulrich Teichert <krypton@...ich-teichert.org>,
	Tim Bird <tim.bird@...sony.com>,
	David Miller <davem@...emloft.net>,
	thomas.petazzoni@...e-electrons.com, linux-kernel@...r.kernel.org,
	linux-embedded@...r.kernel.org, michael@...e-electrons.com
Subject: Re: [patch 0/4] [resend] Add configuration options to disable
	features

On Fri, 2008-08-01 at 12:15 -0700, Linus Torvalds wrote:
> 
> On Thu, 31 Jul 2008, Josh Boyer wrote:
> > On Thu, 2008-07-31 at 20:50 +0200, Ulrich Teichert wrote:
> > > 
> > > I do not think of NTP as desktop or server application, but that's
> > > probably just me,
> > 
> > No, it's not just you.  NTP is useful in cases where things do care
> > about time but hardware designers were too cheap to put an RTC on the
> > board.
> 
> In fact, didn't one of the netgear firewall/switch/routers end up being 
> famous for overloading some NTP service exactly because all the _millions_ 
> of routers ended up using the same (incorrect) NTP host?
> 
> So NTP is very definitely an embedded thing too.

And it's _still_ a red herring.

I just booted a !CONFIG_IGMP kernel on my workstation and NTP is running
just fine (as is IPv6).

Even though ntpd has a configure test for multicast and can be built
without multicast support at all, it isn't even necessary to build it
that way -- the stock Fedora build of it works just fine.

(Actually, I never managed to get ntpd to work _with_ multicast, but
that's a different issue... :)

-- 
dwmw2

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