Re: next boot: 564 boots: 59 failed, 448 passed with 57 offline (next-20160107)

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On Thu, Jan 07, 2016 at 03:59:58PM +0000, Mark Brown wrote:
> On Thu, Jan 07, 2016 at 07:41:52AM -0800, kernelci.org bot wrote:
> 
> > Tree: next
> > Branch: local/master
> > Git Describe: next-20160107
> > Git Commit: 0f023a298a7d2a8e99c54913f7277b3c08c1f5c9
> > Git URL: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> > Tested: 95 unique boards, 25 SoC families, 28 builds out of 135
> > 
> > Boot Failures Detected: https://kernelci.org/boot/?next-20160107&fail
> 
> For the past couple of days -next has been failing to boot on various
> Tegra platforms, there are failures involving either no kernel output or
> (with tegra_defconfig) backtraces during CMA allocation from USB, for
> example:
> 
>    http://storage.kernelci.org/next/next-20160107/arm-tegra_defconfig/lab-khilman/boot-tegra30-beaver.html
> 
> >     multi_v7_defconfig+CONFIG_THUMB2_KERNEL=y:
> >         tegra124-jetson-tk1: 2 failed labs
> >         tegra30-beaver: 1 failed lab
> > 
> >     tegra_defconfig:
> >         tegra124-jetson-tk1: 2 failed labs
> >         tegra124-jetson-tk1_rootfs:nfs: 1 failed lab
> >         tegra124-nyan-big: 1 failed lab
> >         tegra30-beaver: 1 failed lab
> > 
> >     multi_v7_defconfig+CONFIG_ARM_LPAE=y:
> >         tegra124-jetson-tk1: 1 failed lab
> >         tegra124-nyan-big: 1 failed lab
> > 
> >     multi_v7_defconfig:
> >         tegra124-jetson-tk1: 2 failed labs
> >         tegra30-beaver: 1 failed lab
> > 
> >     multi_v7_defconfig+CONFIG_LKDTM=y:
> >         tegra124-jetson-tk1: 2 failed labs
> >         tegra30-beaver: 1 failed lab
> > 
> >     multi_v7_defconfig+CONFIG_PROVE_LOCKING=y:
> >         tegra124-jetson-tk1: 2 failed labs
> >         tegra30-beaver: 1 failed lab
> 
> I did bisects yesterday but they were a bit inconclusive, showing a
> series of skipped commits in the TTY tree as being the culprits:
> 
> afd7f88f157796e586fc99d62da13a54024e0731 serial: 8250: move of_serial code to 8250 directory
> 4e33870b3bb691996354a8f9e8f69458b4fc34d9 serial: of: CONFIG_SERIAL_8250 is always set
> d1b5c87fa8058a3f477ae05555916dd1cea934ad serial: remove NWP serial support
> 
> which seems more than a little surprising and like they might be false
> positives, especially in the cases that do produce output.  The errors
> today look the same.  I've not investigated further than the bisects.
> 
> Full bisect logs:
> 
>  https://ci.linaro.org/view/people/job/tbaker-boot-bisect-bot/140/console
>  https://ci.linaro.org/view/people/job/tbaker-boot-bisect-bot/141/console

These should all be fixed by this patch:

	serial: 8250: of: Fix the driver and actually compile the 8250_of

which can be found in patchwork here:

	https://patchwork.kernel.org/patch/7883541/

I think this is merely waiting to be picked up into the tty tree. I
suspect the reason why there's output in the first place is because
of earlyprintk. I've seen recent linux-next work properly, with the
serial console hanging at some point (fbcon shows login prompt). If
I apply the above patch things are back to normal.

Thierry

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