On 04-Nov-2003 Lukas Ertl wrote: > On Tue, 4 Nov 2003, John Baldwin wrote: > >> Well, a kernel without SMP and just 'device apic' should work fine, and >> a kernel with both SMP and 'device apic' should also work fine. > > But 'device apic' is necessary nowadays? Maybe that should be noted > somewhere. No. You don't have to have it for a UP system just using the 8259A PICs. However, a kernel with 'device apic' compiled in will still work on such systems and still use the 8259A PICs. Additionally, if the UP system actually provides BIOS support for APICs (i.e. an MPTable or a MADT, Intel 845 and 865 chipsets do this for example) then a UP system can use the APICs which is more efficient in that PCI devices do not have to share interrupts. -- John Baldwin <jhb_at_FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/Received on Tue Nov 04 2003 - 09:47:38 UTC
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