Itsuro Oda <[EMAIL PROTECTED]> writes: > > So I believe the fix needs to be to enable apics before we calibrate > > the delay timer. I'm not certain off the top of my head what that > > patch will look like but it should not be fundamentally hard. > > With that code in place we also don't need to do any APIC shutdown > > as the kernel knows enough to completely setup the apics. > > I see. Thank you for your explanation.
I have done a bit more digging. For some reason, likely historical we don't initialize the IO_APIC in init_IRQ(). Instead we wait until smp_prepare_cpus() or smp_init(). Both functions are called much later in the init process than calibrate_delay(). Given the separation that has happened between apics and SMP it should be possible to initialize the local apic and the IO_APIC of the boot cpu much earlier in the game. It looks like it may take some heavy lifting though. Eric - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
