Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"

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To: Roland Dreier <roland@xxxxxxxxxxxxxxx>
Subject: Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"
From: Guenter Roeck <linux@xxxxxxxxxxxx>
Date: Fri, 24 Aug 2018 13:32:51 -0700
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, stable@xxxxxxxxxxxxxxx, matt@xxxxxxxxxxxxxxxxxxx, bp@xxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxxxxxx>, luto@xxxxxxxxxx, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>, bp@xxxxxxxxx, brgerst@xxxxxxxxx, davej@xxxxxxxxxxxxxxxxx, dvlasenk@xxxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, sai.praneeth.prakhya@xxxxxxxxx, sds@xxxxxxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, toshi.kani@xxxxxx, linux-efi@xxxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx>, Yazen.Ghannam@xxxxxxx, Guillaume Tucker <guillaume.tucker@xxxxxxxxxxxxx>
In-reply-to: <CAL1RGDXa2POjmrr8UK-2oYyQtxYxiOs5t9BrpGUHRXqkDjMW5w@mail.gmail.com>
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>
User-agent: Mutt/1.5.24 (2015-08-30)

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

Follow-Ups:
- Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"
  - From: Guillaume Tucker

References:
- [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"
  - From: Greg Kroah-Hartman
- Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"
  - From: Roland Dreier
- Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"
  - From: Ben Hutchings
- Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"
  - From: Roland Dreier
- Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"
  - From: Greg Kroah-Hartman
- Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"
  - From: Roland Dreier
- Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"
  - From: Guenter Roeck
- Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"
  - From: Roland Dreier

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