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SubjectRe: [PATCH kselftest-next] Add cgroup core selftests
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On 07/19/2018 11:08 AM, Roman Gushchin wrote:
> On Wed, Jul 18, 2018 at 07:33:58PM +0200, Claudio wrote:
>> This commit adds tests for some of the core functionalities
>> of cgroups v2.
>>
>> The commit adds tests for some core principles of croup V2 API:
>>
>> - test_cgcore_internal_process_constraint
>>
>> Tests internal process constraint.
>> You can't add a pid to a domain parent if a controller is enabled.
>>
>> - test_cgcore_top_down_constraint_enable
>>
>> Tests that you can't enable a controller on a child if it's not enabled
>> on the parent.
>>
>> - test_cgcore_top_down_constraint_disable
>>
>> Tests that you can't disable a controller on a parent if it's
>> enabled in a child.
>>
>> - test_cgcore_no_internal_process_constraint_on_threads
>>
>> Tests that there's no internal process constrain on threaded cgroups.
>> You can add threads/processes on a parent with a controller enabled.
>>
>> - test_cgcore_parent_becomes_threaded
>>
>> Tests that when a child becomes threaded the parent type becomes
>> domain threaded.
>>
>> - test_cgcore_invalid_domain
>>
>> In a situation like:
>>
>> A (domain threaded) - B (threaded) - C (domain)
>>
>> it tests that C can't be used until it is turned into a threaded cgroup.
>> The "cgroup.type" file will report "domain (invalid)" in these cases.
>> Operations which fail due to invalid topology use EOPNOTSUPP as the errno.
>>
>> - test_cgcore_populated
>>
>> In a situation like:
>>
>> A(0) - B(0) - C(1)
>> \ D(0)
>>
>> It tests that A, B and C's "populated" fields would be 1 while D's 0.
>> It tests that after the one process in C is moved to root, A,B and C's
>> "populated" fields would flip to "0" and file modified events will
>> be generated on the "cgroup.events" files of both cgroups.
>>
>> Signed-off-by: Claudio Zumbo <claudioz@fb.com>
>> Cc: Shuah Khan <shuah@kernel.org>
>> Cc: Roman Gushchin <guro@fb.com>
>> Cc: Tejun Heo <tj@kernel.org>
>> Cc: kernel-team@fb.com
>
> Looks good to me!
>
> Reviewed-by: Roman Gushchin <guro@fb.com>
>
> Thank you!
>

Thanks for the new test. I will queue this up for 4.19-rc1

-- Shuah

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