Re: [PATCH -v3 3/6] x86, NMI, Rewrite NMI handler

Peter Zijlstra
2010-10-11T16:14:08Z

On Sat, 2010-10-09 at 14:49 +0800, Huang Ying wrote:
> notify_die(DIE_NMI_IPI);
> notify_die(DIE_NMI);
> /* process io port 0x61 */
> nmi_watchdog_touch();
> unknown_nmi();

Why keep NMI_IPI? What the heck is it for?

I'd like to see:

DIE_NMI
DIE_NMI_UNKNOWN

In DIE_NMI we walk the chain and deal with NMIs, in DIE_NMI_UNKNOWN we
try to consume extra NMIs where possible (like the much discussed extra
PMU interrupts).