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
