Re: [RFC PATCH v1.1 08/10] selftests/damon/sysfs.sh: test hugepage_mem_bp quota goal

[sashiko-bot@kernel.org]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] The selftest script expects the kernel to accept the 'hugepage_mem_bp' metric for the DAMON sysfs quota goal, but the corresponding kernel feature implementation is missing from this patch series. Writing this value to the `target_metric` sysfs file will return `-EINVAL`, causing the test to unconditionally fail and exit.
--

--- Patch [8]: [RFC PATCH v1.1 08/10] selftests/damon/sysfs.sh: test hugepage_mem_bp quota goal ---
commit 6c11ff9f30e87caf7ac58e12f507a641d985aebc
Author: SJ Park <sj@kernel.org>

selftests/damon/sysfs.sh: test hugepage_mem_bp quota goal

This commit updates the DAMON sysfs selftest to verify that the quota goal
target_metric file accepts the new hugepage_mem_bp input.

> diff --git a/tools/testing/selftests/damon/sysfs.sh b/tools/testing/selftests/damon/sysfs.sh
> index f7fb94b84e716..8690aef1e436c 100755
> --- a/tools/testing/selftests/damon/sysfs.sh
> +++ b/tools/testing/selftests/damon/sysfs.sh
> @@ -210,6 +210,7 @@ test_goal()
>  	ensure_write_succ "$fpath" "active_mem_bp" "valid input"
>  	ensure_write_succ "$fpath" "inactive_mem_bp" "valid input"
>  	ensure_write_succ "$fpath" "node_eligible_mem_bp" "valid input"
> +	ensure_write_succ "$fpath" "hugepage_mem_bp" "valid input"

[Severity: Medium]
Will this test reliably fail because the kernel implementation for the
hugepage_mem_bp metric is missing from this patch series?

If the corresponding kernel feature isn't included, writing this value
to the target_metric sysfs file in test_goal() will return -EINVAL. This
would cause ensure_write_succ() to unconditionally fail and abort the
selftest.

>  	ensure_write_fail "$fpath" "foo" "invalid input"
>  	ensure_file "$goal_dir/nid" "exist" "600"
>  	ensure_file "$goal_dir/path" "exist" "600"

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260729033751.131213-1-sj@kernel.org?part=8