Messages in this thread | | | Date | Sun, 16 Dec 2012 21:39:13 +0100 | From | Borislav Petkov <> | Subject | Re: [regression] 3.7 ends in APIC panic |
| |
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. --
| |