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

[Greg Kroah-Hartman]

On Fri, Aug 31, 2018 at 07:24:08AM +0100, Guillaume Tucker wrote:
> 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

Wonderful, thanks for letting us know.

greg k-h