Re: stable/linux-4.4.y boot: 124 boots: 3 failed, 117 passed with 2 offline, 1 untried/unknown, 1 conflict (v4.4.151)

[Guenter Roeck <linux@roeck-us.net>]

On Fri, Aug 24, 2018 at 09:17:55PM +0100, Guillaume Tucker wrote:
> On 24/08/18 18:41, Guenter Roeck wrote:
> > On Fri, Aug 24, 2018 at 09:30:22AM -0700, Guenter Roeck wrote:
> >> Hi Guillaume,
> >>
> >> On Fri, Aug 24, 2018 at 08:32:07AM +0100, Guillaume Tucker wrote:
> >>> On 22/08/18 14:51, kernelci.org bot wrote:
> >>>> stable/linux-4.4.y boot: 124 boots: 3 failed, 117 passed with 2 offline, 1 untried/unknown, 1 conflict (v4.4.151)
> >>>>
> >>>> Full Boot Summary: https://kernelci.org/boot/all/job/stable/branch/linux-4.4.y/kernel/v4.4.151/
> >>>> Full Build Summary: https://kernelci.org/build/stable/branch/linux-4.4.y/kernel/v4.4.151/
> >>>>
> >>>> Tree: stable
> >>>> Branch: linux-4.4.y
> >>>> Git Describe: v4.4.151
> >>>> Git Commit: 78f654f6cce3442937b8c7eb4b640357871363c1
> >>>> Git URL: http://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
> >>>> Tested: 43 unique boards, 20 SoC families, 22 builds out of 191
> >>>>
> >>>> Boot Regressions Detected:
> >>> [...]
> >>>> x86:
> >>>>
> >>>>     defconfig+kvm_guest:
> >>>>         x86-x5-z8350:
> >>>>             lab-mhart: failing since 6 days (last pass: v4.4.147 - first fail: v4.4.148)
> >>>>
> >>>>     x86_64_defconfig:
> >>>>         x86-x5-z8350:
> >>>>             lab-mhart: failing since 6 days (last pass: v4.4.147 - first fail: v4.4.148)
> >>>
> >>> We've had a couple of automated boot bisections pointing at the
> >>> same commit on an x86 Atom x5-Z8350 platform (AAEON UP-CHT01),
> >>> please see details below.  The issue seems to have started with
> >>> v4.4.148.
> >>>
> >>
> >> Can you test if a backport of upstream commit d367cef0a7f0 ("x86/mm/pat:
> >> Fix boot crash when 1GB pages are not supported by the CPU") fixes
> >> the problem ? It doesn't apply cleanly, but the conflict is easy to
> >> resolve.
> >>
> > 
> > We also may have to reapply commit 87e2bd898d3a ("x86/mm/pat: Ensure cpa->pfn
> > only contains page frame numbers") and fix whatever problems it had.
> 
> I've applied these 2 patches on top of v4.4.152:
> 
>   https://gitlab.collabora.com/gtucker/linux/commits/linux-4.4.152-bisect-atom-x5
> 
> Then I've run the tests using these 2 commits, but they both
> still failed to boot on that platform:
> 
>   http://lava.streamtester.net/scheduler/job/145549
>   http://lava.streamtester.net/scheduler/job/145548
> 
> For the record, here's the same test with v4.4.147 that works:
> 
>   http://lava.streamtester.net/scheduler/job/145547
> 
> Let me know if you have other fixes to apply, I can take another
> look at some point next week.
> 

Roland Dreier is working on a more comprehensive series. I copied you on
the thread. Looks like I missed an entire sequence of EFI related patches
in the backport.

Does anyone know if qemu supports EFI ?

Guenter