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GET /api/patches/2232278/?format=api
{ "id": 2232278, "url": "http://patchwork.ozlabs.org/api/patches/2232278/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/94e79f92aa370c2551cd909bc9ecc0cb8910492c.1777877814.git.sayalip@linux.ibm.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<94e79f92aa370c2551cd909bc9ecc0cb8910492c.1777877814.git.sayalip@linux.ibm.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/94e79f92aa370c2551cd909bc9ecc0cb8910492c.1777877814.git.sayalip@linux.ibm.com/", "date": "2026-05-04T08:24:38", "name": "[v6,01/14] selftests/mm: restore default nr_hugepages value via exit trap in charge_reserved_hugetlb.sh", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "85fb2d71aa3b348e63cda3a09881636539c9ae8e", "submitter": { "id": 92656, "url": "http://patchwork.ozlabs.org/api/people/92656/?format=api", "name": "Sayali Patil", "email": "sayalip@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/94e79f92aa370c2551cd909bc9ecc0cb8910492c.1777877814.git.sayalip@linux.ibm.com/mbox/", "series": [ { "id": 502625, "url": "http://patchwork.ozlabs.org/api/series/502625/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=502625", "date": "2026-05-04T08:24:37", "name": "selftests/mm: fix failures and robustness improvements", "version": 6, "mbox": "http://patchwork.ozlabs.org/series/502625/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2232278/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2232278/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-20401-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=Ovj+vNNt;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; 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lists.ozlabs.org;\n dmarc=pass (p=none dis=none) header.from=linux.ibm.com;\n dkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=Ovj+vNNt; dkim-atps=neutral;\n spf=pass (client-ip=148.163.158.5; helo=mx0b-001b2d01.pphosted.com;\n envelope-from=sayalip@linux.ibm.com;\n receiver=lists.ozlabs.org) smtp.mailfrom=linux.ibm.com", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc\n\t:content-transfer-encoding:date:from:in-reply-to:message-id\n\t:mime-version:references:subject:to; s=pp1; bh=w2yZGEA3lho6ftsax\n\tVq+LrAKP95Gff3FxI3cY3B/TaU=; b=Ovj+vNNtUfZC/45O0hXPVqBkNYrv19xZt\n\tRNQixeCn4w+mVPra7kTg83rKsdZ1f/UY2Uexl7uDc7AdD8pcCe8eSP2Jnt2+3iHM\n\tugbh5i9YunYWkY5ZXUuYyLYPamBg9kLazHbmVMT8oOa6FRgTnG354OgWJeTd3TXG\n\tGj+ogfzrtxhWoZXS6VZW5o7SzlygBD97yeykhc1f0Cd1806BBdXALLx/AA5y5Hrk\n\tuX6jYqBh7n/Ii6BkrKsL5JWyQW2MhindRkto3OyjFaObXYgjtNJRjhdCi/t4iiWG\n\tcL2ICV0YdBGw1H+4w2II48ikWbjH0gWBj5iIP7O8CjGbWxiLCpDVg==", "From": "Sayali Patil <sayalip@linux.ibm.com>", "To": "Andrew Morton <akpm@linux-foundation.org>, Shuah Khan <shuah@kernel.org>,\n linux-mm@kvack.org, linux-kernel@vger.kernel.org,\n linux-kselftest@vger.kernel.org,\n Ritesh Harjani <ritesh.list@gmail.com>", "Cc": "David Hildenbrand <david@kernel.org>, Zi Yan <ziy@nvidia.com>,\n Michal Hocko <mhocko@kernel.org>, Oscar Salvador <osalvador@suse.de>,\n Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,\n Dev Jain <dev.jain@arm.com>, Liam.Howlett@oracle.com,\n linuxppc-dev@lists.ozlabs.org, Miaohe Lin <linmiaohe@huawei.com>,\n Venkat Rao Bagalkote <venkat88@linux.ibm.com>,\n Sayali Patil <sayalip@linux.ibm.com>", "Subject": "[PATCH v6 01/14] selftests/mm: restore default nr_hugepages value via\n exit trap in charge_reserved_hugetlb.sh", "Date": "Mon, 4 May 2026 13:54:38 +0530", "Message-ID": "\n <94e79f92aa370c2551cd909bc9ecc0cb8910492c.1777877814.git.sayalip@linux.ibm.com>", "X-Mailer": "git-send-email 2.52.0", "In-Reply-To": "<cover.1777877814.git.sayalip@linux.ibm.com>", "References": "<cover.1777877814.git.sayalip@linux.ibm.com>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-TM-AS-GCONF": "00", "X-Proofpoint-Reinject": "loops=2 maxloops=12", "X-Authority-Analysis": "v=2.4 cv=XPQAjwhE c=1 sm=1 tr=0 ts=69f857e9 cx=c_pps\n a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17\n a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=Y2IxJ9c9Rs8Kov3niI8_:22 a=Ikd4Dj_1AAAA:8 a=VnNF1IyMAAAA:8\n a=vtM6K80SjIFNW2yxelUA:9", "X-Proofpoint-ORIG-GUID": "q-7WBIXm0DtVv2ifKTsa82aV2XnFn8tc", "X-Proofpoint-GUID": "XLwWjEuZuHE0OgZG4nLZ8eFzXm6GFpDl", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNTA0MDA4NyBTYWx0ZWRfX2rd8cF30XI7q\n rr0hD1TdGSEA1lpoqCEAtAm1XLD1JZ8CSJoYS3KmSYJ1mp/5jI89tnPBtjW86L3//dejv7iG4rt\n W6+nVMPVD549wKKWOQX8GkxmlF68RKxEMoNvnsZscDrS36VXRRYDIxS0eh6D3dkwsU2dIwVrapB\n QuQHpF4ceqJ9sUQjz7VeGNRm8D1SHN91UQUcrhcEm3AaXHlOwqJseE+fgz7kHOv0mdMhOjSGGUm\n TiF4JfH5MRINeAiefHYurps90lwMk2lk89+zFslJeskxrcLE1/2N8H+iUQtiwJAWKvziF/DDOd8\n TGxbXvB+27rjcP2odUcIe34jl53I8Z/kMORMfRaQdMEZhpUwxhZjA8UkpPZHe0tgku+YjQiSw5R\n navsIcxU/4SkgVsLFjYMRyo8PIX0/Ib7k+54NUnpFNaqeB8cK+flsO4uXmGAiSupYbSlVXHdIRT\n GQGSNGoYhfN+4jXlBXQ==", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-05-04_03,2026-04-30_02,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n bulkscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 spamscore=0\n priorityscore=1501 impostorscore=0 phishscore=0 malwarescore=0 clxscore=1015\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605040087", "X-Spam-Status": "No, score=-0.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tRCVD_IN_DNSWL_LOW,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,\n\tSPF_PASS autolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "cleanup() resets nr_hugepages to 0 on every invocation, while the test\nreconfigures it again in the next iteration. This leads to repeated\nallocation and freeing of large numbers of hugepages, especially when\nthe original value is high.\n\nAdditionally, with set -e, failures in earlier cleanup steps (e.g.,\nrmdir or umount returning EBUSY while background activity is still\nongoing) can cause the script to exit before restoring the original\nvalue, leaving the system in a modified state.\n\nIntroduce a trap on EXIT, INT, and TERM to restore the original\nnr_hugepages value once at script termination. This avoids\nunnecessary allocation churn and ensures the original value\nis reliably restored on all exit paths.\n\nFixes: 7d695b1c3695b (\"selftests/mm: save and restore nr_hugepages value\")\nAcked-by: Zi Yan <ziy@nvidia.com>\nTested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>\nSigned-off-by: Sayali Patil <sayalip@linux.ibm.com>\n---\n tools/testing/selftests/mm/charge_reserved_hugetlb.sh | 3 +--\n 1 file changed, 1 insertion(+), 2 deletions(-)", "diff": "diff --git a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh\nindex 44f4e703deb9..e1945901fd20 100755\n--- a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh\n+++ b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh\n@@ -17,6 +17,7 @@ if ! command -v killall >/dev/null 2>&1; then\n fi\n \n nr_hugepgs=$(cat /proc/sys/vm/nr_hugepages)\n+trap 'echo \"$nr_hugepgs\" > /proc/sys/vm/nr_hugepages' EXIT INT TERM\n \n fault_limit_file=limit_in_bytes\n reservation_limit_file=rsvd.limit_in_bytes\n@@ -70,7 +71,6 @@ function cleanup() {\n if [[ -e $cgroup_path/hugetlb_cgroup_test2 ]]; then\n rmdir $cgroup_path/hugetlb_cgroup_test2\n fi\n- echo 0 >/proc/sys/vm/nr_hugepages\n echo CLEANUP DONE\n }\n \n@@ -599,4 +599,3 @@ if [[ $do_umount ]]; then\n rmdir $cgroup_path\n fi\n \n-echo \"$nr_hugepgs\" > /proc/sys/vm/nr_hugepages\n", "prefixes": [ "v6", "01/14" ] }