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.
Guenter