Re: [PATCH v2 0/3] kselftest: Add test to report device log errors

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Thu, Jul 11, 2024 at 03:56:25PM -0600, Shuah Khan wrote:
> On 7/11/24 15:44, Nícolas F. R. A. Prado wrote:
> > On Thu, Jul 11, 2024 at 01:53:37PM -0600, Shuah Khan wrote:
> > > On 7/10/24 15:49, Shuah Khan wrote:
> > > > On 7/10/24 07:11, Greg Kroah-Hartman wrote:
> > > > > On Fri, Jul 05, 2024 at 07:29:53PM -0400, Nícolas F. R. A. Prado wrote:
> > > > > > Log errors are the most widely used mechanism for reporting issues in
> > > > > > the kernel. When an error is logged using the device helpers, eg
> > > > > > dev_err(), it gets metadata attached that identifies the subsystem and
> > > > > > device where the message is coming from. This series makes use of that
> > > > > > metadata in a new test to report which devices logged errors.
> > > > > > 
> > > > > > The first two patches move a test and a helper script to keep things
> > > > > > organized before this new test is added in the third patch.
> > > > > > 
> > > > > > It is expected that there might be many false-positive error messages
> > > > > > throughout the drivers code which will be reported by this test. By
> > > > > > having this test in the first place and working through the results we
> > > > > > can address those occurrences by adjusting the loglevel of the messages
> > > > > > that turn out to not be real errors that require the user's attention.
> > > > > > It will also motivate additional error messages to be introduced in the
> > > > > > code to detect real errors where they turn out to be missing, since
> > > > > > it will be possible to detect said issues automatically.
> > > > > > 
> > > > > > As an example, below you can see the test result for
> > > > > > mt8192-asurada-spherion. The single standing issue has been investigated
> > > > > > and will be addressed in an EC firmware update [1]:
> > > > > > 
> > > > > > TAP version 13
> > > > > > 1..1
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `model_name' property: -6
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `energy_full_design' property: -6
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > >    power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> > > > > > not ok 1 +power_supply:sbs-8-000b
> > > > > >    Totals: pass:0 fail:1 xfail:0 xpass:0 skip:0 error:0
> > > > > > 
> > > > > > [1] https://lore.kernel.org/all/cf4d8131-4b63-4c7a-9f27-5a0847c656c4@notapiano
> > > > > > 
> > > > > > Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> > > > > 
> > > > > Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > > > 
> > > > Is this dependent on a linux-next?
> > > > 
> > > > Didn't apply to linux-kselftest next.
> > > > 
> > > 
> > > I tried applying these on top of linux-kselftest next which is at
> > > Linux 6.10-rc7 + other patches.
> > > 
> > > I am not sure what is wrong - first patch applies and the second
> > > and third don't.
> > > 
> > > git am fails and manual patch application worked for 2/3, same thing
> > > with 3.3 - these should apply cleanly since they don't have obvious
> > > conflicts.
> > > 
> > > Please clean this up and send me updated series adding Greg's ack.
> > 
> > Oh, now I see what happened. I recently sent another series that touches the
> > same file (tools/testing/selftests/devices/test_discoverable_devices.py):
> > "kselftest: devices: Allow running test on more platforms"
> > https://lore.kernel.org/all/20240613-kselftest-discoverable-probe-mt8195-kci-v1-1-7b396a9b032d@collabora.com/
> > 
> > That was already merged through the usb tree, and is present on next (on which I
> > based this series).
> > 
> > In this case I imagine it's best if this series gets picked through the usb
> > tree, right? Even if I rebase on kselftest's next, there will be conflicts.
> > 
> 
> I see. No problem. It can go through usb tree
> 
> Acked-by: Shuah Khan <skhan@linuxfoundation.org>

Ok, taken through the usb tree now, thanks.

greg k-h