Date: Tue, 14 Jun 2011 09:41:20 +0300 From: Daniel Braniss <danny@cs.huji.ac.il> To: Julian Elischer <julian@freebsd.org> Cc: jhell@DataIX.net, Doug Barton <dougb@freebsd.org>, freebsd-current@freebsd.org Subject: Re: rc.d script to load kernel modules Message-ID: <E1QWNJQ-000GOK-OW@kabab.cs.huji.ac.il> In-Reply-To: <4DF63972.8070006@freebsd.org> References: <4DF3E98B.40108@FreeBSD.org> <20110612085649.GA11503@DataIX.net> <4DF50AA1.9080607@FreeBSD.org> <E1QW0VI-000Ohl-K4@kabab.cs.huji.ac.il> <4DF63972.8070006@freebsd.org>
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> On 6/12/11 11:20 PM, Daniel Braniss wrote: > >> On 6/12/2011 1:56 AM, Jason Hellenthal wrote: > >> > >>> Cutting modules out of the kernel in general does help speed up booting > >>> but loading those same modules later in the boot process will just lead > >>> you back to the same boot time. > >> Loading modules via loader.conf is many times slower than doing it from > >> disk after the system is partially booted. (As in, 2-3 seconds per > >> module vs. nearly instantaneous for all 6.) > >> > >> I didn't offer my list as an example of what to do, I offered it as a > >> syntax example. I would of course expect people to use appropriate > >> discretion to load things in loader.conf that are necessary for boot. > >> (Of course, the fact that people can easily get this wrong is a strike > >> against the technique.) > >> > >> There is no point in having an _enable for this script because if the > >> kld_list is empty, nothing happens. > >> > > Doug's solution is what we have been using for a very long time! > > > > the loader.conf solution is not practical when it's shared among many > > hosts -like here where most of the hosts are dataless-, so, moving the not > > essential ones to rc.conf was the obvious solution. > > what would be REALLY cool would be the ability to make loader.conf > have some sort of conditional > clauses.. > > e.g. if MAC== 01:02:03:04:05:06 > blah in case of diskless, this is solved by having a private (per host/per network/etc) rc.conf. in case you use dhcp/pxeboot, you can concatenate several rc.confs to get one tailored. danny
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