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Date:   Wed, 29 May 2019 23:53:27 +0200
From:   Pavel Machek <pavel@ucw.cz>
To:     Jiri Kosina <jikos@kernel.org>
Cc:     "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>, x86@kernel.org,
        linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] x86/power: Fix 'nosmt' vs. hibernation triple fault
 during resume
Message-ID: <20190529215327.GA20914@amd>
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On Wed 2019-05-29 23:27:34, Jiri Kosina wrote:
> On Wed, 29 May 2019, Pavel Machek wrote:
>=20
> > > As explained in
> > >=20
> > > 	0cc3cd21657b ("cpu/hotplug: Boot HT siblings at least once")
> > >=20
> > > we always, no matter what, have to bring up x86 HT siblings during bo=
ot at
> > > least once in order to avoid first MCE bringing the system to its
> > > knees.
> >=20
> >=20
> > > Cc: stable@vger.kernel.org # v4.19+
> > > Debugged-by: Thomas Gleixner <tglx@linutronix.de>
> > > Fixes: 0cc3cd21657b ("cpu/hotplug: Boot HT siblings at least once")
> > > Signed-off-by: Jiri Kosina <jkosina@suse.cz>
> >=20
> > Acked-by: Pavel Machek <pavel@ucw.cz>
> >=20
> > But I'm less sure if this is -stable material. Is reverting
> > 0cc3cd21657be04cb0559fe8063f2130493f92cf in -stable an option?
>=20
> Well, without that commit, first MCE to come kills nosmt system.

=2E..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
--=20
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo=
g.html

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