Messages in this thread | | | Subject | Re: SMP broken on pre-ACPI machine. | From | Sergio Monteiro Basto <> | Date | Thu, 19 Oct 2006 00:45:21 +0100 |
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On Wed, 2006-10-18 at 18:24 -0400, Dave Jones wrote: > I've been chasing a bug that got filed against the Fedora kernel > a while back: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=199052 > This is a dual pentium pro from an era before we had ACPI, and > it seems to be falling foul of this test in smpboot.c .. > > if (!smp_found_config && !acpi_lapic) { > printk(KERN_NOTICE "SMP motherboard not detected.\n"); > smpboot_clear_io_apic_irqs(); > phys_cpu_present_map = physid_mask_of_physid(0); > if (APIC_init_uniprocessor()) > printk(KERN_NOTICE "Local APIC not detected." > " Using dummy APIC emulation.\n"); > map_cpu_to_logical_apicid(); > cpu_set(0, cpu_sibling_map[0]); > cpu_set(0, cpu_core_map[0]); > return; > } > > > My initial reaction is that the !acpi_lapic test should be conditional > on some variable that gets set if the ACPI parsing actually succeeded. > > Thoughts? > > Dave >
acpi=off ? this machine should work with APM. BTW, so time ago, this machine would enter in ACPI blacklist (by the year of bios) and ACPI was turned off automatically.
-- Sérgio M.B. [unhandled content-type:application/x-pkcs7-signature] | |