On Sun, Dec 16, 2012 at 08:46:06PM +0100, Bernd Schubert wrote: > Hmm, I read it the other way around - x2apic depends on interrupt > remapping, but interrupt remapping can be used without x2apic.
Ok, you're right. X2APIC should depend on IRQ_REMAP: https://lwn.net/Articles/289881/ > The help text of CONFIG_IRQ_REMAP also says "x2APIC enhancements or to > support platforms with CPU's having > 8 bit APIC ID, say Y." I guess > may CPU has the latter? I think it is what Yinghai said - you obviously need x2apic kernel support if you have IRQ_REMAP on. > Can the kernel panic a bit improved to help user to understand what > needs to be enabled? Well, your kernel enables IRQ_REMAP properly: [ 0.031115] Enabled IRQ remapping in x2apic mode I guess at that stage we could probably check for x2apic support and scream loudly if it is not present... IMHO. Thanks. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
