Re: [PATCH v6 04/12] x86/smpboot.c: Don't offline CPU0 if any irqcan not be migrated out of it and remove CPU0 check in smp_callin()

From: Ingo Molnar
Date: Mon May 14 2012 - 08:17:30 EST

* Tony Luck <tony.luck@xxxxxxxxx> wrote:

> Biggest code impact of that is the extra code to bring cpu0
> back online using NMI instead of INIT. We can't use INIT
> because if cpu0 gets one, it just resets the whole machine :-(
> But obviously we'd like to avoid special cases where there is
> a sane way to do so.

Could we just standardize on NMI bringup during regular bootup?


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