lkml.org 
[lkml]   [2006]   [Oct]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectSMP broken on pre-ACPI machine.
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

--
http://www.codemonkey.org.uk
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-10-19 00:27    [W:0.125 / U:0.924 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site