next/master boot: 296 boots: 62 failed, 230 passed with 4 conflicts (next-20171113)

[Guillaume Tucker]

On 13/11/17 19:02, kernelci.org bot wrote:
> next/master boot: 296 boots: 62 failed, 230 passed with 4 conflicts (next-20171113)
>
> Full Boot Summary: https://kernelci.org/boot/all/job/next/branch/master/kernel/next-20171113/
> Full Build Summary: https://kernelci.org/build/next/branch/master/kernel/next-20171113/
>
> Tree: next
> Branch: master
> Git Describe: next-20171113
> Git Commit: c348a99ee55feac43b5b62a5957c6d8e2b6c3abe
> Git URL: http://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> Tested: 52 unique boards, 17 SoC families, 33 builds out of 213
>
> Boot Regressions Detected:
>
> arm:
>
[...]
>     multi_v7_defconfig:
[...]
>         tegra124-nyan-big:
>             lab-collabora: failing since 9 days (last pass: next-20171102 - first fail: next-20171103)


There are several things failing on the tegra124-nyan-big, at
least I've isolated one with my latest bisection run:

6c78935777d12ead2d32adf3eb525a24faf02d04 is the first bad commit
commit 6c78935777d12ead2d32adf3eb525a24faf02d04
Author: Kees Cook <keescook at chromium.org>
Date:   Fri Nov 10 16:34:52 2017 +0100

     video: fbdev: Convert timers to use timer_setup()


These boot tests are with multi_v7_defconfig with CONFIG_MODULES
and CONFIG_DRM_NOUVEAU disabled:

* the first one on the revision mentioned above, fails:
   https://lava.collabora.co.uk/scheduler/job/987651

* then the same but with the commit reverted, passes:
   https://lava.collabora.co.uk/scheduler/job/987652

This was found using the still experimental automated bisection
tool for kernelci.org, I'm not sure yet how reliable the results
are.  I think the manual check with these 2 boots proves it, but
I haven't really investigated further than that.

So I then did the same tests at the top of the branch, on the
next-20171113 tag:

* next-20171113, fails but differently:
   https://lava.collabora.co.uk/scheduler/job/987653

* next-20171113 with the commit reverted, still fails:
   https://lava.collabora.co.uk/scheduler/job/987654

It's hard to tell whether the commit I mentioned got fixed
in-between, I guess it would be best to not have any boot failure
in any case.

The next thing I'll try is start a bisection for the other
failure see on next-20171113 tag, with the commit above reverted
and see if it leads anywhere...

Hope this helps!

Guillaume

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