Re: [PATCH 22/25] x86/mcheck: Do the init in one place

[Borislav Petkov]

On Mon, Nov 07, 2016 at 09:12:24PM +0100, Borislav Petkov wrote:
> On Mon, Nov 07, 2016 at 10:55:24AM -0800, Luck, Tony wrote:
> > I don't think that helps as much as you'd like it to help (at
> > least on Intel). A broadcast machine check that finds the boot
> > CPU has set CR4[MCE]=1 is still going to end up in reset if any
> > other CPU still has CR4[MCE]=0
> 
> By leaving/moving the setting of CR4 earlier on all cores, we'll
> at least make the possible window for such potential resets a lot
> smaller...

... and in general, I'm still unsure about *why* we need this change for
hotplug. bigeasy, can you please clarify first?

Thanks.

-- 
Regards/Gruss,
    Boris.

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