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Tue, 14 Apr 2026 08:22:28 +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 v5 03/14] selftests/mm: restore default nr_hugepages value via EXIT trap in hugetlb_reparenting_test.sh Date: Tue, 14 Apr 2026 13:51:57 +0530 Message-ID: X-Mailer: git-send-email 2.52.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: rE0So6VxTRSr-JNZsHW_VohT8S-IPIVv X-Proofpoint-ORIG-GUID: _c3onDjL4oP2oWKaZ33v_D6t8RMr7XNi X-Authority-Analysis: v=2.4 cv=WbE8rUhX c=1 sm=1 tr=0 ts=69ddf94e cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=Ikd4Dj_1AAAA:8 a=VnNF1IyMAAAA:8 a=dU9eaedoi-733nYHt2kA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDE0MDA3NyBTYWx0ZWRfX8pR7Jq7VxSXV jwjTDKCAtn3iBPFdJ+IkeLmbXZl8xVgk44EEPCAPHg3DO2+l2i3skRw+p1OBJegKJdc5YMV+Pcf E6i5yCnYds+6Nf0k65RMmZjyx2DozJt9a5wGN16v2LHbnsZMIge6XgovPDwN3/dKOR7kkIe3RMH 8a8ROHDrfAJAoH2GEmFJuFWUGDLShJNuY3fm48rFq6gnXBLixGF4oyViRtFrtBo4grTFDCIN2j7 iWkDsdJ7ATbOe/6tC8Pivvt1NEeDpFb77HEfffAuitfgf+TzzGHhTkXQFJ51JhK5MOMxTWZgW0S 1XR5NyAgAUF0Z6chLdEdwJpTM3pLzFAZ6x9InNSmOrq0HUG+5NjDsySPZxiSxP4yQH9tbkdXrDF LRuwxfmco0iOQ1ke9fFcGxL6Y9+pmjcCPCjLbrKoCle04cm3OaDoqFvUROCSYGAfnLI1L4ogZo1 2KVKEdenIi/ASrDFS2A== 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=2026-04-14_02,2026-04-13_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 priorityscore=1501 spamscore=0 clxscore=1015 phishscore=0 impostorscore=0 adultscore=0 malwarescore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604140077 X-Rspamd-Queue-Id: 3CC6640002 X-Stat-Signature: n8s7doxsbs5bbns1axkeu88acgdrwabr X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1776154966-868590 X-HE-Meta: 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 NUxSwfK4 Y0ZAw4ilhref7xDel3LBP18kJ2AwHRzD/hFEK41UZ8Pd+NGVYgHzYs5AdOvQtmTpMbA3ci8T4HjCVsnzL4CrfgNC6OtBTTcGsW/Sa4FUH120AGIb7mdpNwojd6YPq56jWFv5mBfOklVYW+CyVoaOBgnuVclY33bjXYEJtAr/ne0lozQebFzl6wneWLP/SpeInrAvFn4YFOgq5BgqnWbJeEDW07ssDa68begfuvQ8FR8MAMQCfyJji5TRA/CSBxnJspPeMVSCQt078vCTM7z5O0mplynMgaO3mfs+CBMIspSMV4wYgk576XDjnZLUQMofdzAb3mmLIOpfHKKr7GetveQ5ToZd3zevV7wGiwQqec0lAO4pNGNKrylwdriALjYrYehnoG9tuziDMw5fhdrj4wO02XhmxJDQAVtJjSgUnOcJf8Osl95plKnrZPQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The test modifies nr_hugepages during execution and restores it from cleanup() and again reconfigure it setup, which is invoked multiple times across test flow. This can lead to repeated allocation/freeing of hugepages. With set -e, failures in cleanup (e.g., rmdir/umount) can also cause early exit before restoring the original value at the end. Move restoration to a single EXIT trap so the original value is restored reliably on all exit paths while avoiding repeated churn. Fixes: 585a9145886a ("selftests/mm: restore default nr_hugepages value during cleanup in hugetlb_reparenting_test.sh") Acked-by: Zi Yan Tested-by: Venkat Rao Bagalkote Signed-off-by: Sayali Patil --- tools/testing/selftests/mm/hugetlb_reparenting_test.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/mm/hugetlb_reparenting_test.sh b/tools/testing/selftests/mm/hugetlb_reparenting_test.sh index 0dd31892ff67..7ddb370e1572 100755 --- a/tools/testing/selftests/mm/hugetlb_reparenting_test.sh +++ b/tools/testing/selftests/mm/hugetlb_reparenting_test.sh @@ -12,6 +12,8 @@ if [[ $(id -u) -ne 0 ]]; then fi nr_hugepgs=$(cat /proc/sys/vm/nr_hugepages) +trap 'echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages' EXIT + usage_file=usage_in_bytes if [[ "$1" == "-cgroup-v2" ]]; then @@ -56,7 +58,6 @@ function cleanup() { rmdir "$CGROUP_ROOT"/a/b 2>/dev/null rmdir "$CGROUP_ROOT"/a 2>/dev/null rmdir "$CGROUP_ROOT"/test1 2>/dev/null - echo $nr_hugepgs >/proc/sys/vm/nr_hugepages set -e } @@ -240,4 +241,3 @@ if [[ $do_umount ]]; then rm -rf $CGROUP_ROOT fi -echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages -- 2.52.0