Re: [PATCH v2 2/4] selftests/cgroup: add memcg_stat_cross_cpu correctness test for flush

[JP Kobryn]

On 7/21/26 10:48 AM, Ziyang Men wrote:
> Add a test_progs selftest that verifies the memory-cgroup BPF kfuncs
> return values that agree with what userspace reads from cgroupfs, across
> a whole cgroup subtree that has been charged on many CPUs.
>
> It complements the existing cgroup_iter_memcg test.  cgroup_iter_memcg
> calls the memcg kfuncs on a single cgroup (BPF_CGROUP_ITER_SELF_ONLY) and
> only asserts each value is greater than zero, so it never checks that a
> value is actually correct.  This test compares the kfunc values against
> what userspace reads from memory.stat, and checks every node in the
> cgroup tree.
Can you extend the existing test instead of adding a new one?