Re: [PATCH v2] selftests/cgroup: test_zswap: skip test_no_kmem_bypass if debugfs is unavailable

[Nhat Pham]

On Mon, Aug 10, 2026 at 10:14 PM Wilson Felipe Pereira
<wfel...@google.com> wrote:
>
> test_no_kmem_bypass() needs to read
> /sys/kernel/debug/zswap/stored_pages via get_zswap_stored_pages() to
> verify that compressed pages are charged to the memcg.
>
> When running in an environment where debugfs is not mounted or
> CONFIG_DEBUG_FS is disabled, get_zswap_stored_pages() fails, causing the
> loop to terminate early and report a false negative (KSFT_FAIL).
>
> Selftests should not fail if debugfs is unavailable, and it should print
> a message when it is skipped.
>
> While I'm here, also add a warning message if the test is being skipped
> due to totalram size and make the check for totalram more readable.
>
> Signed-off-by: Wilson Felipe Pereira <wfel...@google.com>

Acked-by: Nhat Pham <npha...@gmail.com>