• Claudio's avatar
    Add cgroup core selftests · d863cb03
    Claudio authored
    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: default avatarClaudio 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
    Acked-by: default avatarTejun Heo <tj@kernel.org>
    Reviewed-by: default avatarRoman Gushchin <guro@fb.com>
    Signed-off-by: default avatarShuah Khan (Samsung OSG) <shuah@kernel.org>
    d863cb03
Makefile 215 Bytes