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

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Message-ID: <71c479fb-cd25-45ec-8dd3-0521ef951f58@linuxfoundation.org>
Date: Wed, 10 Jul 2024 15:49:15 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Nícolas F. R. A. Prado <nfraprado@...labora.com>
Cc: Shuah Khan <shuah@...nel.org>, kernel@...labora.com,
 linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
 kernelci@...ts.linux.dev, Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v2 0/3] kselftest: Add test to report device log errors

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@...labora.com>
> 
> Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

Is this dependent on a linux-next?

Didn't apply to linux-kselftest next.

thanks,
-- Shuah