Re: [PATCH bpf-next v3 8/8] bpf: add a selftest for cgroup hierarchical stats collection

Hao Luo
2022-07-11T06:01:38Z

On Sun, Jul 10, 2022 at 5:51 PM Yonghong Song <yhs@fb.com> wrote:
>
>
>
> On 7/10/22 5:26 PM, Yonghong Song wrote:
[...]
>
> BTW, CI also reported the test failure.
> https://github.com/kernel-patches/bpf/pull/3284
>
> For example, with gcc built kernel,
> https://github.com/kernel-patches/bpf/runs/7272407890?check_suite_focus=true
>
> The error:
>
> get_cgroup_vmscan_delay:PASS:cgroup_id 0 nsec
> get_cgroup_vmscan_delay:PASS:vmscan_reading 0 nsec
> check_vmscan_stats:FAIL:child1_vmscan unexpected child1_vmscan:
> actual 28390910 != expected 28390909
> check_vmscan_stats:FAIL:child2_vmscan unexpected child2_vmscan:
> actual 0 != expected -2
> check_vmscan_stats:PASS:test_vmscan 0 nsec
> check_vmscan_stats:PASS:root_vmscan 0 nsec
>

Yonghong,

I noticed that the test only failed on test_progs-no_alu32, not
test_progs. test_progs passed. I believe Yosry and I have only tested
on test_progs. I tried building and running the no_alu32 version, but
so far, not able to run test_progs-no_alu32. Whenever I ran
test_progs-no_alu32, it exits without any message. Do you have any
clue what could be wrong?

> > …