linux-kernel - Re: [PATCH v4] x86/power: Fix 'nosmt' vs. hibernation triple fault during resume

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Message-ID: <20190530233804.syv4brpe3ndslyvo@treble>
Date:   Thu, 30 May 2019 18:38:04 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Jiri Kosina <jikos@...nel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>, Ingo Molnar <mingo@...hat.com>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] x86/power: Fix 'nosmt' vs. hibernation triple fault
 during resume

On Thu, May 30, 2019 at 11:38:51PM +0200, Rafael J. Wysocki wrote:
> On Thu, May 30, 2019 at 11:27 PM Thomas Gleixner <tglx@...utronix.de> wrote:
> >
> > On Thu, 30 May 2019, Rafael J. Wysocki wrote:
> > > >
> > > > Cc: stable@...r.kernel.org # v4.19+
> > > > Debugged-by: Thomas Gleixner <tglx@...utronix.de>
> > > > Fixes: 0cc3cd21657b ("cpu/hotplug: Boot HT siblings at least once")
> > > > Signed-off-by: Jiri Kosina <jkosina@...e.cz>
> > >
> > > LGTM
> > >
> > > And I would prefer this one to go in through the PM tree due to the
> > > hibernate core changes,
> >
> > Ok.
> >
> > > so can I get an ACK from the x86 arch side here, please?
> >
> > No. Is the following good enough?
> >
> >     Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
> 
> Yes, it is, thanks!

I still think changing monitor/mwait to use a fixmap address would be a
much cleaner way to fix this.  I can try to work up a patch tomorrow.

-- 
Josh