Re: [PATCH v2 4/4] x86/static_call: Add inline static call implementation for x86-64

From: Steven Rostedt
Date: Fri Nov 30 2018 - 15:28:59 EST

On Fri, 30 Nov 2018 12:18:33 -0800
Andy Lutomirski <luto@xxxxxxxxxx> wrote:

> Or we could replace that IPI with x86's bona fide serialize-all-cpus
> primitive and then we can just retry instead of emulating. It's a
> piece of cake -- we just trigger an SMI :) /me runs away.

I must have fallen on my head one too many times, because I really like
the idea of synchronizing all the CPUs with an SMI! (If that's even
possible). The IPI's that are sent are only to force smp_mb() on all
CPUs. Which should be something an SMI could do.

/me runs after Andy

-- Steve