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

[Guillaume Tucker]

On 24/08/18 21:32, Guenter Roeck wrote:
> 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/

Looks like this has now been fixed with Andi's patch in 4.4.153:

  "x86/mm/pat: Fix L1TF stable backport for CPA"

I can confirm this platform is now booting fine in kernelci:

  http://lava.streamtester.net/scheduler/job/146195

Thanks,
Guillaume