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From:   "Rafael J. Wysocki" <rjw@rjwysocki.net>
To:     Thomas Gleixner <tglx@linutronix.de>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Ingo Molnar <mingo@kernel.org>,
        Kees Cook <keescook@chromium.org>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        Borislav Petkov <bp@alien8.de>, Len Brown <lenb@kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Andrew Morton <akpm@linux-foundation.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Tony Luck <tony.luck@intel.com>, Jiri Kosina <jkosina@suse.cz>,
        Bob Moore <robert.moore@intel.com>,
        Erik Schmauss <erik.schmauss@intel.com>
Subject: Re: [GIT PULL] x86/topology changes for v5.3
Date:   Wed, 10 Jul 2019 12:03:23 +0200
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In-Reply-To: <alpine.DEB.2.21.1907100039540.1758@nanos.tec.linutronix.de>
References: <20190708162756.GA69120@gmail.com> <alpine.DEB.2.21.1907100023020.1758@nanos.tec.linutronix.de> <alpine.DEB.2.21.1907100039540.1758@nanos.tec.linutronix.de>
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On Wednesday, July 10, 2019 1:00:32 AM CEST Thomas Gleixner wrote:
> On Wed, 10 Jul 2019, Thomas Gleixner wrote:
> > On Tue, 9 Jul 2019, Linus Torvalds wrote:
> > > I also don't have any logs, because the boot never gets far enough. I
> > > assume that there was a problem bringing up a non-boot CPU, and the
> > > eventual hang ends up being due to that.
> > 
> > Hrm. I just build the tip of your tree and bootet it. It hangs at:
> > 
> > [    4.788678] ACPI: 4 ACPI AML tables successfully acquired and loaded
> > [    4.793860] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
> > [    4.821476] ACPI: Dynamic OEM Table Load:
> > 
> > That's way after the secondary CPUs have been brought up. tip/master boots
> > without problems with the same config. Let me try x86/asm alone and also a
> > revert of the CR4/CR0 stuff.
> 
> x86/asm works alone
> 
> revert of cr4/0 pinning on top of your tree gets stuck as well
> 
> > And while writing this the softlockup detector muttered:
> 
> Have not yet fully bisected it, but Jiri did and he ended up with
> 
>   c522ad0637ca ("ACPICA: Update table load object initialization")
> 
> Reverting that on top of your tree makes it work again. Tony has the same
> issue.

I have a revert of this one queued up (with a plan to push it later today).

Cheers,
Rafael