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SubjectRe: [PATCH] selftests: intel_pstate: Fix a condition which does not notify user that root permission is useful
thanks. i will work on...

On Wed, May 9, 2018 at 11:54 PM, Daniel Díaz <daniel.diaz@linaro.org> wrote:
> Hello!
>
>
> On 05/09/2018 12:38 PM, Jeffrin Jose T wrote:
>> aperf program uses /dev/cpu which is normally a root only
>> access area. so in that case to successfully run thet test,
>> root permissions are required.This patch is in the file run.sh.
>>
>> Signed-off-by: Jeffrin Jose T <jeffrin@rajagiritech.edu.in>
>> ---
>> tools/testing/selftests/intel_pstate/run.sh | 8 ++++++++
>> 1 file changed, 8 insertions(+)
>>
>> diff --git a/tools/testing/selftests/intel_pstate/run.sh b/tools/testing/selftests/intel_pstate/run.sh
>> index 23a2e4e9880e..05d35392dcfd 100755
>> --- a/tools/testing/selftests/intel_pstate/run.sh
>> +++ b/tools/testing/selftests/intel_pstate/run.sh
>> @@ -31,6 +31,14 @@
>>
>> EVALUATE_ONLY=0
>>
>> +uid=$(id -u)
>> +if [ $uid -ne 0 ]; then
>> + echo "-----------------------"
>> + echo $msg please run this as root >&2
>> + echo "-----------------------"
>> + exit 0
>> +fi
>> +
>
> Other tests simply use $UID. See:
> cpufreq/main.sh
> cpu-hotplug/cpu-on-off-test.sh
> efivarfs/efivarfs.sh
> gpio/gpio-mockup.sh
> memory-hotplug/mem-on-off-test.sh
>
> This doesn't take into account the conditions for EVALUATE_ONLY: When
> it's set non-zero, neither aperf nor cpupower run at all.
>
> While this is under review, you might want to base your change on
> Shuah's patch for skipping:
>
> https://lists.linaro.org/pipermail/linux-kselftest-mirror/2018-May/001074.html
>
>
>> if ! uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ | grep -q x86; then
>> echo "$0 # Skipped: Test can only run on x86 architectures."
>> exit 0
>
> I'd leave this check at the forefront, as this "hurdle" is
> insurmountable in other architectures, whereas becoming root is attainable.
>
> Thanks and greetings!
>
> Daniel Díaz
> daniel.diaz@linaro.org



--
software engineer
rajagiri school of engineering and technology

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