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SubjectRe: [BUG] 2.5.63: ESR killed my box!
On Wed, 26 Feb 2003, Martin J. Bligh wrote:

> The boot cpu *is* always CPU#0. It may not be physical apicid 0, but that
> matters not. as long as the mpstables are correct. And we should bug out if
> it's not (which is pretty stupid anyway ... we know what the boot cpu ID
> is, we should just warn). This is how I fixed it for kexec:
>
> diff -urpN -X /home/fletch/.diff.exclude virgin/arch/i386/kernel/smpboot.c
> nonzero_apicid/arch/i386/kernel/smpboot.c
> --- virgin/arch/i386/kernel/smpboot.c Sat Feb 15 16:11:40 2003
> +++ nonzero_apicid/arch/i386/kernel/smpboot.c Wed Feb 26 13:02:10 2003
> @@ -951,6 +951,7 @@ static void __init smp_boot_cpus(unsigne
> print_cpu_info(&cpu_data[0]);
>
> boot_cpu_logical_apicid = logical_smp_processor_id();
> + boot_cpu_physical_apicid = hard_smp_processor_id();
>
> current_thread_info()->cpu = 0;
> smp_tune_scheduling();

But this patch is for smpboot.c, which is not even compiled in for a UP
kernel...

Both Rusty and I had problems with a UP+APIC kernel running on an SMP box.

Ion

--
It is better to keep your mouth shut and be thought a fool,
than to open it and remove all doubt.

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