Re: GRR!! SMP=1 sucks
H. Peter Anvin (hpa@transmeta.com)
Thu, 9 Apr 1998 09:38:31 -0700 (PDT)
> On Thu, 9 Apr 1998, Elliot Lee wrote:
>
> > On 9 Apr 1998, H. Peter Anvin wrote:
> >
> > > NO!!! It is a Big Problem if an SMP kernel can't boot on a UP
> > > machine, as it means there is no kernel which can run on all machines.
>
> it can:
>
> Linux version 2.0.33 (root@twin.uoregon.edu) (gcc version 2.7.2.1) #2 Sat Mar 21 16:44:54 PST 1998
> Booting processor 0 stack 00002000: APIC delivery error (4).
> Error: only one processor found.
>
> This is a dual ppro 200 one cpu is pulled at the moment because the fan
> died.
>
> Realisiticly speaking it's unlikely that one kernel could do everything
> anyway given the amount of hardware that we support. On digital unix the
> boot kernel is about 8mb because it has literally everything compiled into
> it.
>
Well, most things can be done as modules, but SMP isn't one of them.
I have found it important to use an SMP kernel as the install kernel,
because only an SMP kernel will tell you if the machine is SMP and
hence if you should install the SMP or the UP kernel by default.
-hpa
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