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Date:      Fri, 29 Sep 2006 17:27:47 +0100 (BST)
From:      Robert Watson <rwatson@FreeBSD.org>
To:        Warner Losh <imp@bsdimp.com>
Cc:        astrodog@gmail.com, current@freebsd.org
Subject:   Re: lockf in installworld -- not a good idea
Message-ID:  <20060929172657.Q74256@fledge.watson.org>
In-Reply-To: <20060929.091414.74722768.imp@bsdimp.com>
References:  <20060929134332.GD4776@rambler-co.ru> <20060929144738.W70454@fledge.watson.org> <2fd864e0609290707t7e7d6e17g61a09ff5aa10ff3f@mail.gmail.com> <20060929.091414.74722768.imp@bsdimp.com>

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On Fri, 29 Sep 2006, Warner Losh wrote:

>> For what its worth.... I'd go with just stopping support for -j in 
>> installworld, even if things are CPU bound.
>
> installworld should *NEVER* be done -j.  Ever.  That wasn't part of the 
> installworld bargin when it was started.  There's no point to it at all. 
> As such, any support to make it work should be removed with extreme 
> prejustice.  Why on earth would you want to do installworld -j?

I wouldn't doubt that it's at least marginally faster, possibly a bit faster, 
but I think I come down pretty firmly on the side of "let's make installworld 
as simple and reliable as possible" -- breaking in the middle of installworld 
can have messy consequences, and we should minimize the chances of that as 
much as possible.

Robert N M Watson
Computer Laboratory
University of Cambridge



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