Messages in this thread | | | Date | Thu, 28 Dec 2000 17:44:54 +0000 (GMT) | From | John Levon <> | Subject | Re: Activating APIC on single processor |
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On 28 Dec 2000, David Huggins-Daines wrote:
> <fpieraut@casi.polymtl.ca> writes: > > > I activate APIC interruption with the configuration of linux kernel > > 2.4.0test-11. In the linux kernel configuration under processor type and > > features I activate "APIC and IO-APIC support on uniprocessor", and I > > desactivate "Symmetric multi-processing support". The only way I found to > > check APIC activation is looking into /proc/interrupts, no "IO-APIC" can > > be found there. So I read IO-APIC.txt and I suppose there sould be > > conflicts with IRQ of my PCI cards. So I remove all my PCI cards and still > > have no APIC interrupt. > > Is there another way to check APIC activation? > > Am-I doing to right things to activate IO-APIC? > > You might not actually have an IO-APIC or even a local APIC. This is > the case with the Mobile PIII for instance (I puzzled over this myself > for a long time). > > To find out for sure, run: > > grep 'flags.*apic' /proc/cpuinfo
This isn't for sure. I bet you *do* have a local APIC.
This flag is missing on a Pentium II here - I think the BIOS disables it. However, it can be enabled in the normal way just fine.
The presence of an IO-APIC is a different matter.
thanks john
-- "The majority of the stupid is invincible and guaranteed for all time. The terror of their tyranny, however, is alleviated by their lack of consistency." - Albert Einstein
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