Re: Re: [PATCH] Handle disabled local apic better

[Andi Kleen <ak-l3A5Bk7waGM@public.gmane.org>]

> > > Here we're disabling MPS with "nolapic" -- something that "maxcpus=0"
> > > and "nosmp" never effectively did before...
> > 
> > MPS without local APIC is useless.
> 
> I agree, my point is that "nosmp" and "maxcpus=0" are broken in that
> they didn't disable MPS this early.

Sure, it's broken. Also when the APIC initialization fails and probably
some other cases.

> > No, even when you parse in parse_cmdline_early() you need a __setup,
> > otherwise the normal __setup parser will complain about unknown 
> > options.
> 
> Huh?  So if I boot a kernel with an unknown parameter, say
> "len=gone_fishing", where would I expect to see the complaint -- I don't
> see it in my dmesg except where the entire commmand line is dumped out.

That will result in a environment variable len in init's environment with
value gone_fishing and is not unknown. But nolapic doesn't have a = 

-Andi



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