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Thu, 12 Mar 2026 12:26:01 +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, Sayali Patil Subject: [PATCH v2 01/13] selftests/mm: restore default nr_hugepages value during cleanup in charge_reserved_hugetlb.sh Date: Thu, 12 Mar 2026 17:55:28 +0530 Message-ID: <9d150c91d4fe18732f9a90234e6878b7bd7f61f7.1773305677.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: AW1haW4tMjYwMzEyMDA5NSBTYWx0ZWRfXyt5MxPqV/3Id hTNhrbYZLCurtfYEXPNatnN/hOFjgQ+1mMkfU4Fv9Di/WjsEO0YDak1PvRiEYhzceP8rLGph3NH fUqsSd4fD5PNEUp9dEaaLGEpUZO3riogyGW0PIXTt2tcVXcTu2mehg9HaMarrMm1ytcPJvStAMZ cKDISL9xjw/kpU+ri+4aEq8mbdsJrM1h+bMUDNSjv09I6TYBJA2RwNVX+XOsYaKblgHXKkMvT3x TMlHKicZxHc/+p/ejcbVEJeg/tZFAqLLJ397DM6pbCcamX7pSY9FAsGOobR24sYyf7/6Zjj6kvE Ay/xW99MzFmmHnXIAtXvpE1xLOgyc6kDqfQHBWfFSbbB1Za+XU5vrc0dvAlsYbS6NeN/KL7Se3N nwRaFM4arNuMrzbyuP0Gk4PNvbVc7vo+jRliWxhB95ffgAwvBFwZCg6eQhuFn6P3oIOHbZg5m6V SkMeYHtq+ZoqbhxMZgg== X-Proofpoint-ORIG-GUID: s9imjdtoYdCWrwIH55kSoeUlUuV8-fqF X-Authority-Analysis: v=2.4 cv=RLO+3oi+ c=1 sm=1 tr=0 ts=69b2b0e1 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=Ikd4Dj_1AAAA:8 a=VnNF1IyMAAAA:8 a=ZPMwvEa68uiV5BrjEmoA:9 X-Proofpoint-GUID: XV0_N_WBNmd1FZFKjZZBVtYm8c2R0vMR 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=2026-03-12_01,2026-03-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 priorityscore=1501 phishscore=0 suspectscore=0 clxscore=1015 impostorscore=0 bulkscore=0 adultscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603120095 Content-Type: text/plain; charset="utf-8" During cleanup, the value of /proc/sys/vm/nr_hugepages is currently being set to 0. At the end of the test, if all tests pass, the original nr_hugepages value is restored. However, if any test fails, it remains set to 0. With this patch, we ensure that the original nr_hugepages value is restored during cleanup, regardless of whether the test passes or fails. Fixes: 7d695b1c3695b ("selftests/mm: save and restore nr_hugepages value") Reviewed-by: Zi Yan Signed-off-by: Sayali Patil Reviewed-by: David Hildenbrand (Arm) --- tools/testing/selftests/mm/charge_reserved_hugetlb.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh b/tools/= testing/selftests/mm/charge_reserved_hugetlb.sh index 447769657634..c9fe68b6fcf9 100755 --- a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh +++ b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh @@ -65,7 +65,7 @@ function cleanup() { if [[ -e $cgroup_path/hugetlb_cgroup_test2 ]]; then rmdir $cgroup_path/hugetlb_cgroup_test2 fi - echo 0 >/proc/sys/vm/nr_hugepages + echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages echo CLEANUP DONE } =20 --=20 2.52.0