From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <stable-owner@vger.kernel.org>
Received: from mail-pf1-f194.google.com ([209.85.210.194]:43251 "EHLO
        mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1726728AbeHYAJE (ORCPT
        <rfc822;stable@vger.kernel.org>); Fri, 24 Aug 2018 20:09:04 -0400
Date: Fri, 24 Aug 2018 13:32:51 -0700
From: Guenter Roeck <linux@roeck-us.net>
To: Roland Dreier <roland@purestorage.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Ben Hutchings <ben.hutchings@codethink.co.uk>,
        LKML <linux-kernel@vger.kernel.org>, stable@vger.kernel.org,
        matt@codeblueprint.co.uk, bp@suse.de,
        Andrew Morton <akpm@linux-foundation.org>,
        Andy Lutomirski <luto@amacapital.net>, luto@kernel.org,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>, bp@alien8.de,
        brgerst@gmail.com, davej@codemonkey.org.uk, dvlasenk@redhat.com,
        "H. Peter Anvin" <hpa@zytor.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Peter Zijlstra <peterz@infradead.org>,
        sai.praneeth.prakhya@intel.com, sds@tycho.nsa.gov,
        Thomas Gleixner <tglx@linutronix.de>, toshi.kani@hp.com,
        linux-efi@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
        Yazen.Ghannam@amd.com,
        Guillaume Tucker <guillaume.tucker@collabora.com>
Subject: Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only
 contains page frame numbers"
Message-ID: <20180824203251.GD18715@roeck-us.net>
References: <20171215092305.994559179@linuxfoundation.org>
 <20171215092311.347628971@linuxfoundation.org>
 <CAL1RGDVgShymmT+TJ3mAHEL7n+qoisk6mQ=Tji_T=0d_QA=VKw@mail.gmail.com>
 <1535129126.2902.36.camel@codethink.co.uk>
 <CAL1RGDW1Lo+F5D479Jsi-AFsmjVpdDre_qOFSCwWubG6U=bxeQ@mail.gmail.com>
 <20180824191749.GA15489@kroah.com>
 <CAL1RGDXUx-frpWuuYyc-VrAEoOU2+irGQPRWvoBzO2ZxEPGrww@mail.gmail.com>
 <20180824201025.GB18715@roeck-us.net>
 <CAL1RGDXa2POjmrr8UK-2oYyQtxYxiOs5t9BrpGUHRXqkDjMW5w@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAL1RGDXa2POjmrr8UK-2oYyQtxYxiOs5t9BrpGUHRXqkDjMW5w@mail.gmail.com>
Sender: stable-owner@vger.kernel.org
List-ID: <stable.vger.kernel.org>

On Fri, Aug 24, 2018 at 01:16:18PM -0700, Roland Dreier wrote:
> > Sounds great. I'll hold off with sending my RFT series and wait for your
> > test results. I think we'll also need d367cef0a7f0c6 ("x86/mm/pat: Fix
> > boot crash when 1GB pages are not supported by the CPU").
> 
> Sure, makes sense - I don't have any EFI systems with CPUs old enough
> not to support 1G pages but that looks reasonable.  I'll pull that
> into my tree as well.
> 
kernelci reported a crash on a CPU which doesn't support 1G pages.
See https://kernelci.org/boot/id/5b7d39ea59b514c03796ba9c/

Guenter