linux-kernel - Re: Regression with mainline kernel on rpi4

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Date:   Wed, 22 Sep 2021 11:10:34 +0100
From:   Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Emma Anholt <emma@...olt.net>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: Regression with mainline kernel on rpi4

On Wed, Sep 22, 2021 at 10:57 AM Maxime Ripard <maxime@...no.tech> wrote:
>
> On Mon, Sep 20, 2021 at 06:21:42PM +0100, Sudip Mukherjee wrote:
> > On Mon, Sep 20, 2021 at 6:10 PM Maxime Ripard <maxime@...no.tech> wrote:
> > >
> > > On Mon, Sep 20, 2021 at 05:35:00PM +0100, Sudip Mukherjee wrote:
> > > > On Mon, Sep 20, 2021 at 4:53 PM Maxime Ripard <maxime@...no.tech> wrote:
> > > > >
> > > > > On Mon, Sep 20, 2021 at 05:43:33PM +0200, Maxime Ripard wrote:
> > > > > > On Mon, Sep 20, 2021 at 04:47:31PM +0200, Maxime Ripard wrote:
> > > > > > > On Sat, Sep 04, 2021 at 10:40:29AM +0100, Sudip Mukherjee wrote:
> > > > > > > > Hi Maxime,
> > > > > > > >
> > > > > > > > On Sat, Sep 4, 2021 at 10:10 AM Maxime Ripard <maxime@...no.tech> wrote:
> > > > > > > > >
> > > > > > > > > On Fri, Sep 03, 2021 at 09:09:50PM +0100, Sudip Mukherjee wrote:
> > > > > > > > > > Hi Maxime,
> > > > > > > > > >
> > > > > > > > > > On Fri, Sep 3, 2021 at 5:03 PM Maxime Ripard <maxime@...no.tech> wrote:
> > > > > > > > > > >
> > > > > > > > > > > Hi Sudip,
> > > > > > > > > > >
> > > > > > > > > > > On Thu, Sep 02, 2021 at 10:08:19AM +0100, Sudip Mukherjee wrote:
> > > > > > > > > > > > Hi All,
> > > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > <snip>
> > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > >
> > > > > > > > > > > > You can see the complete dmesg at
> > > > > > > > > > > > https://openqa.qa.codethink.co.uk/tests/76#step/dmesg/8
> > > > > > > > > > >
> > > > > > > > > > > What test were you running?
> > > > > > > > > >
> > > > > > > > > > Nothing particular, its just a boot test that we do every night after
> > > > > > > > > > pulling from torvalds/linux.git
> > > > > > > > >
> > > > > > > > > What are you booting to then?
> > > > > > > >
> > > > > > > > I am not sure I understood the question.
> > > > > > > > Its an Ubuntu image. The desktop environment is gnome. And as
> > > > > > > > mentioned earlier, we use the HEAD of linus tree every night to boot
> > > > > > > > the rpi4 and test that we can login via desktop environment and that
> > > > > > > > there is no regression in dmesg.
> > > > > > >
> > > > > > > Looking at the CI, this isn't from a RPi but from qemu?
> > > >
> > > > No, this is from rpi4 board (4GB), not qemu. The CI is a little
> > > > complicated here, lava boots the board with the new kernel and will
> > > > then trigger the openQA job. openQA will then connect to the board
> > > > using vnc to test the desktop. This is the last link that I sent to
> > > > Linus when he asked for it.
> > > > https://lava.qa.codethink.co.uk/scheduler/job/164#L1356
> > > >
> > > > And this is the lava job for today -
> > > > https://lava.qa.codethink.co.uk/scheduler/job/173
> > >
> > > Is it connected to a monitor then?
> >
> > Missed replying to this one earlier. I have a hdmi lilliput monitor
> > connected to it.
> >
> > >
> > > > > > >
> > > > > > > What defconfig are you using? How did you generate the Ubuntu image?
> > > > > > > Through debootstrap? Any additional package?
> > > >
> > > > Its the default ubuntu config. I can send you the config if you want.
> > >
> > > Yes, please.
> >
> > Attached.
> > My build script will copy this config as .config,  do olddefconfig
> > and then build.
>
> I still can't reproduce it.
>
> What other customisations did you do to that image? It looks like
> there's some customs scripts in there (test-mainline.sh), what are they
> doing?

That test script is triggering the openqa job, but its running only
after lava is able to login. The trace is appearing before the login
prompt even, so test_mainline.sh should not matter here.
The only customization done to the default ubuntu image is the initrd.
Can you please try with the initrd from
https://elisa-builder-00.iol.unh.edu/kernel/mainline/rpi4/initrd.gz..
I will check with another board also.


-- 
Regards
Sudip