I solved this with the "apic=bigsmp" kernel option; the i386 SMP kernel
now boots fine and 16 cpu's show up.
deb
On Fri, 2006-02-03 at 16:32 -0700, Debbie Mazurek wrote:
> On Mon, 2006-01-30 at 08:49 -0600, Troy Dawson wrote:
> > Connie Sieh wrote:
> > > On Fri, 27 Jan 2006, Debbie Mazurek wrote:
> > >
> > >
> > >>Hi,
> > >>
> > >>I have a Dell Poweredge 6800, with 4 Intel 64 bit 7020-chipset dual-core
> > >>CPU's. They also support hyperthreading.
> > >>
> > >>I can't get the 2.6.9-22.0.2 SMP x86 kernel to boot. The UP kernel
> > >>boots fine.
> > >>
> > >>The x86_64 SMP kernel boots fine, but apparently only supports 8 cpu's -
> > >>unfortunately hyperthreading *has to* work, for a research project.
> > >
> > >
> > > The x86_64 kernel only supports 8 cpu's. The Upstream Vendor has implied
> > > that Update 3 will enable 32 cpu's.
> > >
> > If you can't wait that long, and really don't need the 64 bit part, the
> > i386 kernel does support 32 cpu's right now.
>
> That's what I thought - and that's what I'd like!
> But - the SMP kernel will not boot.
> The last message on the console, after finding initrd & linuz images, is
>
> Uncompressing Linux...... OK, booting the kernel
>
> and then stops.
> The UP kernel boots fine, but I need the SMP.
>
>
>
> >
> > Since our kernel is the same as RedHat's, we can use their 'hardware
> > limitation' chart as found here
> >
> > http://www.redhat.com/en_us/USA/rhel/details/limits/
> >
> > The line you are looking for is under
> > Technology Limits (certified)
> > Maximum Logical CPU's
> > AMD64/EM64T
> >
> >
> >
> > >>I was under the impression that the x86 kernel *should* work on a 64-bit
> > >>machine. Is this not the case? Any info or experiences would be
> > >>appreciated.
> > >>
> > >
> > >
> > > It does work on a 8 cpu 64 bit machine.
> > >
> > >
> > >>cheers,
> > >>deb
> > >>
> > >
> > >
> > > -Connie Sieh
> >
> >
--
d e b b i e m a z u r e k [log in to unmask]
system admin . department of computer science . university of calgary
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