Re: [PATCH v5 13/14] selftests/mm: move hwpoison setup into run_test() and silence modprobe output for memory-failure category

[Miaohe Lin <linmiaohe@huawei.com>]

On 2026/4/14 16:22, Sayali Patil wrote:
> run_vmtests.sh contains special handling to ensure the hwpoison_inject
> module is available for the memory-failure tests. This logic was
> implemented outside of run_test(), making the setup category-specific
> but managed globally.
> 
> Move the hwpoison_inject handling into run_test() and restrict it
> to the memory-failure category so that:
> 1. the module is checked and loaded only when memory-failure tests run,
> 2. the test is skipped if the module or the debugfs interface
> (/sys/kernel/debug/hwpoison/) is not available.
> 3. the module is unloaded after the test if it was loaded by the script.
> 
> This localizes category-specific setup and makes the test flow
> consistent with other per-category preparations.
> 
> While updating this logic, fix the module availability check.
> The script previously used:
> 
> 	modprobe -R hwpoison_inject
> 
> The -R option prints the resolved module name to stdout, causing every
> run to print:
> 
> 	hwpoison_inject
> 
> in the test output, even when no action is required, introducing
> unnecessary noise.
> 
> Replace this with:
> 
> 	modprobe -n hwpoison_inject
> 
> which verifies that the module is loadable without producing output,
> keeping the selftest logs clean and consistent.
> 
> Also, ensure that skipped tests do not override a previously recorded
> failure. A skipped test currently sets exitcode to ksft_skip even if a
> prior test has failed, which can mask failures in the final exit status.
> Update the logic to only set exitcode to ksft_skip when no failure has
> been recorded.
> 
> Fixes: ff4ef2fbd101 ("selftests/mm: add memory failure anonymous page test")
> Reviewed-by: Zi Yan <ziy@nvidia.com>
> Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
> Signed-off-by: Sayali Patil <sayalip@linux.ibm.com>

Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>

Thanks.
.