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GET /api/patches/2216788/?format=api
{ "id": 2216788, "url": "http://patchwork.ozlabs.org/api/patches/2216788/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/0a4106d7c594c5bb471a48ca37348883e204d295.1774591179.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": "<0a4106d7c594c5bb471a48ca37348883e204d295.1774591179.git.sayalip@linux.ibm.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/0a4106d7c594c5bb471a48ca37348883e204d295.1774591179.git.sayalip@linux.ibm.com/", "date": "2026-03-27T07:16:04", "name": "[v3,10/13] selftests/mm: skip uffd-stress test when nr_pages_per_cpu is zero", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "41c43a2105cc3117214134efe9383c229725c722", "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/0a4106d7c594c5bb471a48ca37348883e204d295.1774591179.git.sayalip@linux.ibm.com/mbox/", "series": [ { "id": 497700, "url": "http://patchwork.ozlabs.org/api/series/497700/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=497700", "date": "2026-03-27T07:15:54", "name": "selftests/mm: fix failures and robustness improvements", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/497700/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2216788/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216788/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-18912-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=LiEclG8f;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; helo=lists.ozlabs.org;\n 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bh=5xKgzXiNSjPsI3xL6\n\tCBUcueD9iNfMUrfEZZj3ej3r5o=; b=LiEclG8frPoXgeGENPcHnZcNAecW6VR0o\n\teoeDqXILKxcu6T4iDDqS1zR/nYHDgUgVEAZvTwKfDJXZexoebD8SC4zULAAmM4Pr\n\trj3o/+geNP0lExV7+A1nJWRFvi4KAqX7yJTYlNxIVcunkp0xX4YcTaZONiaSVe0k\n\t5NEpsH2zLEy3OcL0cSKZnDeTB3KRSxMNflzosAfugMwN7YxCLiePMFOcWWwQh9XG\n\tAB0xJxpSFk5cGIyozVT7cszuJ3VKFxijWeuf9VzhQAhB9uO9RQ6YwdzwMv8duDkE\n\tLbCFJ2Ji5k9CqAEVp3AP0DyM+9sF5T53GZu6Ezd8TjDFUxGEUUEeA==", "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, Sayali Patil <sayalip@linux.ibm.com>,\n Venkat Rao Bagalkote <venkat88@linux.ibm.com>", "Subject": "[PATCH v3 10/13] selftests/mm: skip uffd-stress test when\n nr_pages_per_cpu is zero", "Date": "Fri, 27 Mar 2026 12:46:04 +0530", "Message-ID": "\n <0a4106d7c594c5bb471a48ca37348883e204d295.1774591179.git.sayalip@linux.ibm.com>", "X-Mailer": "git-send-email 2.52.0", "In-Reply-To": "<cover.1774591179.git.sayalip@linux.ibm.com>", "References": "<cover.1774591179.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-Proofpoint-GUID": "frLCNW1iVTSq9AaZCHJVFXBO5zcD0Dc-", "X-Proofpoint-ORIG-GUID": "MYRXE58sXUGpmeOMyvvjqTyXBDqY2Bzw", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwMzI3MDA1MyBTYWx0ZWRfX495l3EIu1lud\n ScaXI4PF3+Kv4YIo47PIOEjZjsSpTggeXXdCG6FWOzul3f/CVHld7wY4jwdkuM6gAJwoRYo526J\n eAyYF/xJctANrBsbxTiT8yMrvQA+mPTPx4gVKsKmhF2ESM8cIz7l4e00QceSWqx/ayRruicNJWm\n dibmHfV390a6yhay1ILqVljkYO8JELQ7FzUoiG7uH/4kSHxfw/sU+F3ImlT1lr3N5Zr637FqDM5\n 09boSfNJ85wZyTCJjhHm3wl9nJE8nYvRnblkNPIXQuQASd24otUYXIebBJtqOzfKgfVRZXdzfP0\n VwFf4MhfFhAUXPTAR+gbZs6e4vHgCOpjxk2rXFklY9dqyCOrUyFstDslBZeoXEwjrJdnI9FkAhA\n Dnn3egtK6rh31R8WCFBkidRutv4ElcxN+dAmRI/dyZWVt+bVbuQoXH3NmhvVLH19eK9HVsXNPql\n KbnS5z6bi0jX4exD3Kw==", "X-Authority-Analysis": "v=2.4 cv=KbXfcAYD c=1 sm=1 tr=0 ts=69c62f27 cx=c_pps\n a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17\n a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=RzCfie-kr_QcCd8fBx8p:22 a=Ikd4Dj_1AAAA:8 a=VnNF1IyMAAAA:8\n a=-JjagEEUfC1zOw73BwIA:9", "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=2026-03-26_04,2026-03-26_01,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n suspectscore=0 impostorscore=0 malwarescore=0 adultscore=0 clxscore=1015\n priorityscore=1501 bulkscore=0 lowpriorityscore=0 phishscore=0 spamscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603270053", "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": "uffd-stress currently fails when the computed nr_pages_per_cpu\nevaluates to zero:\n\nnr_pages_per_cpu = bytes / page_size / nr_parallel\n\nThis can occur on systems with large hugepage sizes (e.g. 1GB) and a\nhigh number of CPUs, where the total allocated memory is sufficient\noverall but not enough to provide at least one page per cpu.\n\nIn such cases, the failure is due to insufficient test resources\nrather than incorrect kernel behaviour. Update the test\nto treat this condition as a test skip instead of reporting an error.\n\nFixes: db0f1c138f18 (\"selftests/mm: print some details when uffd-stress gets bad params\")\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/uffd-stress.c | 6 +++---\n 1 file changed, 3 insertions(+), 3 deletions(-)", "diff": "diff --git a/tools/testing/selftests/mm/uffd-stress.c b/tools/testing/selftests/mm/uffd-stress.c\nindex 700fbaa18d44..b8f22ea859a6 100644\n--- a/tools/testing/selftests/mm/uffd-stress.c\n+++ b/tools/testing/selftests/mm/uffd-stress.c\n@@ -491,9 +491,9 @@ int main(int argc, char **argv)\n \n \tgopts->nr_pages_per_cpu = bytes / gopts->page_size / gopts->nr_parallel;\n \tif (!gopts->nr_pages_per_cpu) {\n-\t\t_err(\"pages_per_cpu = 0, cannot test (%lu / %lu / %lu)\",\n-\t\t\tbytes, gopts->page_size, gopts->nr_parallel);\n-\t\tusage();\n+\t\tksft_print_msg(\"pages_per_cpu = 0, cannot test (%lu / %lu / %lu)\\n\",\n+\t\t\t bytes, gopts->page_size, gopts->nr_parallel);\n+\t\treturn KSFT_SKIP;\n \t}\n \n \tbounces = atoi(argv[3]);\n", "prefixes": [ "v3", "10/13" ] }