Re: problems getting SMP to work with vanilla 2.4.26

[Marcelo Tosatti <marcelo.tosatti@cyclades.com>]

On Sun, Jul 04, 2004 at 11:14:38AM -0700, Zack Brown wrote:
> Hi Marcelo, folks,
> 
> On Sun, Jul 04, 2004 at 11:13:36AM -0300, Marcelo Tosatti wrote:
> > On Sat, Jul 03, 2004 at 07:05:43PM -0700, Zack Brown wrote:
> > > Hi folks,
> > > 
> > > When booting vanilla 2.4.26 with SMP enabled, I get a lockup before the
> > > boot sequence is completed. The same kernel with SMP disabled boots and runs
> > > just fine. Both CPUs are detected by the system at bootup, before lilo takes
> > > over. Here's the error as I wrote it down from the screen, followed by the
> > > .config file:
> > > 
> > > ------------------------------ cut here ------------------------------
> > > Using local APIC timer interrupts.
> > > Calibrating APIC timer...
> > > ..... CPU clock speed is 1004.4785 MHZ
> > > ..... hostbus clock speed is 133.9304 MHz
> > > cpu: 0, clocks: 1339304, slice: 446434
> > > CPU0<T0:1339296,T1:892848,D:14,S:446434,C:1339304>
> > > cpu: 1, clocks: 1339304, slice: 446434
> > > CPU1<T0:1339296,T1:446416,D:12,S:446434,C:1339304>
> > > ------------------------------ cut here ------------------------------
> > > 
> > > At that point the machine just hangs, with no keys recognized, and I have
> > > to power-cycle the machine in order to boot to a UP kernel.
> > > 
> > > I'd appreciate any help I can get with this.
> > 
> > I can't help much really. Tried CONFIG_ACPI_BOOT=n ? 
> > 
> 
> I did after getting your email, and I had some trouble with that. After
> 'make mrproper', and loading in the relevant .config I'd saved, menuconfig
> then said that I had the ACPI option already disabled. If I enabled the master
> ACPI section, all the sub-options were also disabled. So I had to quit out of
> that and edit the .config by hand in order to set CONFIG_ACPI_BOOT=n. That's
> the only change I made to the .config before recompiling.
> 
> I did a 'make dep' and 'make bzImage', and got the following error. It
> looks like the kernel really wants that option enabled.

Hi Zack, 

Silly me, its not possible to compile SMP image without CONFIG_ACPI_BOOT (a lot of
SMP detection code is linked to basic ACPI infrastructure).

Can you please try the nolapic/noapic boot options? They should disable the APIC, and
if APIC is the "root" of your crashes, we will find out that way.

Sorry for the noise.