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Mon, 6 Apr 2026 09:20:27 +0000 (GMT) From: Sayali Patil To: Andrew Morton , Shuah Khan , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Ritesh Harjani Cc: David Hildenbrand , Zi Yan , Michal Hocko , Oscar Salvador , Lorenzo Stoakes , Dev Jain , Liam.Howlett@oracle.com, linuxppc-dev@lists.ozlabs.org, Miaohe Lin , Venkat Rao Bagalkote , Sayali Patil Subject: [PATCH v4 13/15] selftests/mm: move hwpoison setup into run_test() and silence modprobe output for memory-failure category Date: Mon, 6 Apr 2026 14:49:32 +0530 Message-ID: <8ef8640092004d143fe80e6fc32ea8d30a9080de.1775466330.git.sayalip@linux.ibm.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDA2MDA5MCBTYWx0ZWRfX3oslSqiFf+LQ p6SaJ1Q3vw9BSrU0PRFLFDRhkKrZ/n64kViRHF+jfc8/ldlHAFDpmwKctEzTiCpJeBsLr0ufUxl 1qJV9d7Y64QtR9Y2zkyzMI7BLwlJkx8cJmaxLvSpmKO63EHMJ85raAn35PX6sB5EdSfd20/FHqK TPIOUdE3UBJ2LYKMz7E+KBB+Ecw88HOmNDWAVuH7Rzg5rXEbe9SUFbUxcPtly4cYILEOh2LL4CU 368D+pch/KIY1GINjcomiIVEYJ9F6NS27gICBIa4NDWJKgivnU3z9ZpuGG9hTEUT/oF/ISK3qjK Nm3uNGPX+3onphblaXscmT2EyOqtJcU4bq9b2w3Yh8SkKaVk1TGDKq9D9VEbGJtgmgR4p/u4Np2 cZlQp+oCmeMA+/EiaICc0YweZXTdYIl6KbglhwlohGCfmVqQnolsiUNH4N2W//UN0aaYjiLBJOB pRsTMCrHZPdqiNSGx0g== X-Proofpoint-GUID: QYU5me-PA449jhZ1jmNCEMx5dtqm78Fn X-Proofpoint-ORIG-GUID: l6L2mecNU6czOwdTVez3C-q7FeG_yKkj X-Authority-Analysis: v=2.4 cv=HJvO14tv c=1 sm=1 tr=0 ts=69d37ae4 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=w_JUWIshtjp1QPcyv1YA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-06_02,2026-04-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 clxscore=1015 lowpriorityscore=0 adultscore=0 malwarescore=0 spamscore=0 phishscore=0 priorityscore=1501 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604060090 Content-Type: text/plain; charset="utf-8" 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") Signed-off-by: Sayali Patil --- tools/testing/selftests/mm/run_vmtests.sh | 52 ++++++++++++++--------- 1 file changed, 33 insertions(+), 19 deletions(-) diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/self= tests/mm/run_vmtests.sh index afdcfd0d7cef..17c9bd910c47 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -235,6 +235,7 @@ pretty_name() { run_test() { if test_selected ${CATEGORY}; then local skip=3D0 + local LOADED_MOD=3D0 =20 # On memory constrainted systems some tests can fail to allocate hugepag= es. # perform some cleanup before the test for a higher success rate. @@ -250,6 +251,28 @@ run_test() { fi fi =20 + # Ensure hwpoison_inject is available for memory-failure tests + if [ "${CATEGORY}" =3D "memory-failure" ]; then + # Try to load hwpoison_inject if not present. + HWPOISON_DIR=3D/sys/kernel/debug/hwpoison/ + if [ ! -d "$HWPOISON_DIR" ]; then + if ! modprobe -n hwpoison_inject > /dev/null 2>&1; then + echo "Module hwpoison_inject not found, skipping..." \ + | tap_prefix + skip=3D1 + else + modprobe hwpoison_inject > /dev/null 2>&1 + LOADED_MOD=3D1 + if [ ! -d "$HWPOISON_DIR" ]; then + echo "hwpoison debugfs interface not present" \ + | tap_prefix + skip=3D1 + fi + fi + fi + + fi + local test=3D$(pretty_name "$*") local title=3D"running $*" local sep=3D$(echo -n "$title" | tr "[:graph:][:space:]" -) @@ -261,6 +284,12 @@ run_test() { else local ret=3D$ksft_skip fi + + # Unload hwpoison_inject if we loaded it + if [ -n "${LOADED_MOD}" ]; then + modprobe -r hwpoison_inject > /dev/null 2>&1 + fi + count_total=3D$(( count_total + 1 )) if [ $ret -eq 0 ]; then count_pass=3D$(( count_pass + 1 )) @@ -270,7 +299,9 @@ run_test() { count_skip=3D$(( count_skip + 1 )) echo "[SKIP]" | tap_prefix echo "ok ${count_total} ${test} # SKIP" | tap_output - exitcode=3D$ksft_skip + if [ $exitcode -eq 0 ]; then + exitcode=3D$ksft_skip + fi else count_fail=3D$(( count_fail + 1 )) echo "[FAIL]" | tap_prefix @@ -529,24 +560,7 @@ CATEGORY=3D"page_frag" run_test ./test_page_frag.sh no= naligned =20 CATEGORY=3D"rmap" run_test ./rmap =20 -# Try to load hwpoison_inject if not present. -HWPOISON_DIR=3D/sys/kernel/debug/hwpoison/ -if [ ! -d "$HWPOISON_DIR" ]; then - if ! modprobe -q -R hwpoison_inject; then - echo "Module hwpoison_inject not found, skipping..." - else - modprobe hwpoison_inject > /dev/null 2>&1 - LOADED_MOD=3D1 - fi -fi - -if [ -d "$HWPOISON_DIR" ]; then - CATEGORY=3D"memory-failure" run_test ./memory-failure -fi - -if [ -n "${LOADED_MOD}" ]; then - modprobe -r hwpoison_inject > /dev/null 2>&1 -fi +CATEGORY=3D"memory-failure" run_test ./memory-failure =20 if [ "${HAVE_HUGEPAGES}" =3D 1 ]; then echo "$orig_nr_hugepgs" > /proc/sys/vm/nr_hugepages --=20 2.52.0