On Wed 2019-05-29 23:27:34, Jiri Kosina wrote:
> On Wed, 29 May 2019, Pavel Machek wrote:
>
> > > As explained in
> > >
> > > 0cc3cd21657b ("cpu/hotplug: Boot HT siblings at least once")
> > >
> > > we always, no matter what, have to bring up x86 HT siblings during boot at
> > > least once in order to avoid first MCE bringing the system to its
> > > knees.
> >
> >
> > > Cc: sta...@vger.kernel.org # v4.19+
> > > Debugged-by: Thomas Gleixner <t...@linutronix.de>
> > > Fixes: 0cc3cd21657b ("cpu/hotplug: Boot HT siblings at least once")
> > > Signed-off-by: Jiri Kosina <jkos...@suse.cz>
> >
> > Acked-by: Pavel Machek <pa...@ucw.cz>
> >
> > But I'm less sure if this is -stable material. Is reverting
> > 0cc3cd21657be04cb0559fe8063f2130493f92cf in -stable an option?
>
> Well, without that commit, first MCE to come kills nosmt system.
...which is same situation 4.9-stable and 4.14-stable lives with for a
long long time, right?
But you are right, reverting 0cc3cd21657b does not look like good
option :-(.
Pavel
--
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