Messages in this thread | | | Date | Mon, 12 Jan 2004 14:35:18 +0100 | From | Helge Hafting <> | Subject | Re: SMP or UP??? |
| |
DervishD wrote: > Hi Mikael :) > > * Mikael Pettersson <mikpe@csd.uu.se> dixit: > >>>kernel: found SMP MP-table at 000fb210 >>> What, SMP table? >> >>You have an anti-problem. The chipset includes an I/O-APIC >>(good) and your mobo manufacturer was decent enough to include >>the appropriate BIOS MP tables to describe it to the OS. > > > Oh, nice. I thought that the mobo was a simple reisuing of a SMP > mobo from Gigabyte with one socket removed O:) > > >>Other manufacturers skip the MP table, forcing you to enable >>ACPI and pray it actually works. > > > Excuse my ignorance but: why a UP system needs the MP table? Why > the I/O-APIC needs anything related with multiprocessor in an UP > system?. I lost my way on hardware back in the 486, I think... > The MP table tells the kernel details about that I/O-APIC. (Advanced Programmable Interrupt Controller).
This isn't really about SMP, but every SMP board has one or more APICs. They have to. It is optional on a uniprocessor board, but it is nice to have as it gives lower interrupt latency.
Helge Hafting
- 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/
| |