From: Feng Zhou zhoufeng.zf@bytedance.com
Trace sched related functions, such as enqueue_task_fair, it is necessary to specify a task instead of the current task which within a given cgroup.
Feng Zhou (2): bpf: Add bpf_task_under_cgroup() kfunc selftests/bpf: Add testcase for bpf_task_under_cgroup
Changelog: v3->v4: Addressed comments from Yonghong Song - Modify test cases and test other tasks, not the current task. Details in here: https://lore.kernel.org/all/20230427023019.73576-1-zhoufeng.zf@bytedance.com...
v2->v3: Addressed comments from Alexei Starovoitov - Modify the comment information of the function. - Narrow down the testcase's hook point Details in here: https://lore.kernel.org/all/20230421090403.15515-1-zhoufeng.zf@bytedance.com...
v1->v2: Addressed comments from Alexei Starovoitov - Add kfunc instead. Details in here: https://lore.kernel.org/all/20230420072657.80324-1-zhoufeng.zf@bytedance.com...
kernel/bpf/helpers.c | 20 +++++++ tools/testing/selftests/bpf/DENYLIST.s390x | 1 + .../bpf/prog_tests/task_under_cgroup.c | 55 +++++++++++++++++++ .../bpf/progs/test_task_under_cgroup.c | 51 +++++++++++++++++ 4 files changed, 127 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/task_under_cgroup.c create mode 100644 tools/testing/selftests/bpf/progs/test_task_under_cgroup.c