On 12/16/2012 08:13 PM, Borislav Petkov wrote: > On Sun, Dec 16, 2012 at 07:28:59PM +0100, Bernd Schubert wrote: >> CONFIG_X86_X2APIC depends on CONFIG_IRQ_REMAP, which I disabled as it >> is marked as experimental... > > You shouldn't pay too much attention to CONFIG_EXPERIMENTAL because it > is on its way out from the kernel tree.
I usually don't too much, if I understand what it is about and what are the consequences. > > But if you don't want to have interrupt remapping on your system, > you can disable it nevertheless. Wait, you can't: according to > d0b03bd1c6725a3463290d7f9626e4b583518a5a, you can use x2apic without > interrupt remapping but interrupt remapping needs to be enabled before > x2apic. Hmm, I read it the other way around - x2apic depends on interrupt remapping, but interrupt remapping can be used without x2apic. 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? Can the kernel panic a bit improved to help user to understand what needs to be enabled? Thanks, Bernd -- 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/
