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Date:   Wed, 29 May 2019 20:02:47 +0200 (CEST)
From:   Jiri Kosina <jikos@kernel.org>
To:     Josh Poimboeuf <jpoimboe@redhat.com>
cc:     "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Pavel Machek <pavel@ucw.cz>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Peter Zijlstra <peterz@infradead.org>, x86@kernel.org,
        linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] x86/power: Fix 'nosmt' vs. hibernation triple fault
 during resume
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On Wed, 29 May 2019, Jiri Kosina wrote:

> The target kernel only onlines the CPUs which were online at the time of 
> hibernation (and are therefore in frozen_cpus mask).

Hm, there is a catch though. After resume, the SMT siblings are now in hlt 
instead of mwait.

Which means that the resumed kernel has to do one more online/offline 
cycle for them, to push them to mwait again.

Bah.

I'll send v3 shortly, so please don't apply v2 just yet.

-- 
Jiri Kosina
SUSE Labs