Re: kexec reboot fails with extra wbinvd introduced for AME SME

[Dave Young]

On 01/17/18 at 07:00pm, Linus Torvalds wrote:
> On Wed, Jan 17, 2018 at 6:57 PM, Dave Young <dyoung@xxxxxxxxxx> wrote:
> >
> > Could you say more about how to check this? My .config disabled
> > CONFIG_X86_MCE, should this be enabled?
> 
> By all means, try it.
> 
> Some pending machine check exception that we have *not* reacted to,
> and that is pending around kexec boot could very possibly be relevant.
> 
> I forget your exact symptoms. Was it that the _first_ kexec works, but
> the second one hangs? Or was that the other unrelated issue? Or have I
> confused this with some other report entirely?

Yes, 1st kexec works, 2nd hangs.

Rebuilding with MCE enabled now.

Thanks
Dave
> 
>                Linus