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GET /api/patches/2220076/?format=api
{ "id": 2220076, "url": "http://patchwork.ozlabs.org/api/patches/2220076/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/80239ca37ad96216eb5d9768cf5373e7246626ff.1775466330.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": "<80239ca37ad96216eb5d9768cf5373e7246626ff.1775466330.git.sayalip@linux.ibm.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/80239ca37ad96216eb5d9768cf5373e7246626ff.1775466330.git.sayalip@linux.ibm.com/", "date": "2026-04-06T09:19:30", "name": "[v4,11/15] selftests/mm: skip uffd-wp-mremap if UFFD write-protect is unsupported", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "f770ae0d28c806a7f908cf4cd1e35fd102a676f4", "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/80239ca37ad96216eb5d9768cf5373e7246626ff.1775466330.git.sayalip@linux.ibm.com/mbox/", "series": [ { "id": 498833, "url": "http://patchwork.ozlabs.org/api/series/498833/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=498833", "date": "2026-04-06T09:19:22", "name": "selftests/mm: fix failures and robustness improvements", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/498833/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2220076/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220076/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19391-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=SlYAUe+A;\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=SlYAUe+A; dkim-atps=neutral;\n spf=pass (client-ip=148.163.156.1; helo=mx0a-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=4EhSDCaShB3rwYDRo\n\tPDml275sLaBm682LiODn0nNoJA=; b=SlYAUe+AeupJfmqPHmLhxTv4QT36LOWMi\n\tohq/Wr7hohSFUcOOvuqr41B8QyTMQQvIZTkzpYtZUXTrDIPFsO+HG5PTnBDbKR6t\n\tN+/or0IKpaINK0iTBTIxf4EXRRFhI71sovPEIAWCsZmJiub3Lyw44y1az56RlVKm\n\tZlaVFfq2cYX/xYG0ryrUDhm+9gIbh2Wv37GAks9e+9fBUgLBc0P/YsqbhAIN50Nh\n\thgfvUHaIDmhjAkNd1xB1wsfbWLRsU7kFsAxV2qo2yP1GV7ktVlguAGXe7kyUbmsy\n\tCE+s98FhB3E90RHxRswjQAsUzH8I9aAorGtThZUMYsPceg0PvpeLw==", "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 v4 11/15] selftests/mm: skip uffd-wp-mremap if UFFD\n write-protect is unsupported", "Date": "Mon, 6 Apr 2026 14:49:30 +0530", "Message-ID": "\n <80239ca37ad96216eb5d9768cf5373e7246626ff.1775466330.git.sayalip@linux.ibm.com>", "X-Mailer": "git-send-email 2.52.0", "In-Reply-To": "<cover.1775466329.git.sayalip@linux.ibm.com>", "References": "<cover.1775466329.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=Bp+QAIX5 c=1 sm=1 tr=0 ts=69d37add cx=c_pps\n a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17\n a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=smpEqqgnm6pLQfsEXf8A:9", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDA2MDA5MCBTYWx0ZWRfXytqH8299SKPD\n PVQJKEJHCkWQbxYxPj/MoPmMhEO8RC1kHq3SmCPnK1lGXik11ZxKObaVcuWaZoyVkVAGhFfQ7Vd\n 6rO4L2mg4Xfbcqd+pBX5Cp3x4Q0503GX36ok1hhEbYMDJysN1cARN5WxrSaNCCDZhLF1f92W0tn\n 2DyXNa08oxLTzsCsoZzyh7k2/ujiAe5JX0h0mnbcxMGly/DpQdCg9qUxbsWBG3/cFXRbWgXq2Dp\n +5uHuk/txcYSiiQeO1rAQ0H9v41HRewWrM70Jzool8QdLz6qr5Qt+78ajPvW5oIrJ3ATQIzPNBO\n j2oQ2dGaU3hzYNcjtn4Cnj48FDEbo7MGx0TWvHEnC87q8LeDlgcPUkz8+E0UcX2uPT5nyQOmSyQ\n wOw7711hK93/86KPxFJqrG9t0wol3d9rYiCkN/m8NdoF4kSxgVpj+synVwHUh/MY+tpF3AHFTSU\n 4gBehsWBAIpujgZSt5A==", "X-Proofpoint-GUID": "TrWGYxJH8XCEQHRv6-L2CCTECgip6Ygn", "X-Proofpoint-ORIG-GUID": "AFSrbBGVTCsL7NYa1mLGsp1tKkwjbZIc", "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=2026-04-06_02,2026-04-03_01,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n phishscore=0 malwarescore=0 suspectscore=0 adultscore=0 impostorscore=0\n spamscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 clxscore=1015\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604060090", "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": "The uffd-wp-mremap test requires the UFFD_FEATURE_PAGEFAULT_FLAG_WP\ncapability. On systems where userfaultfd write-protect is\nnot supported, uffd_register() fails and the test reports failures.\n\nCheck for the required feature at startup and skip the test when the\nUFFD_FEATURE_PAGEFAULT_FLAG_WP capability is not present,\npreventing false failures on unsupported configurations.\n\nBefore patch:\n running ./uffd-wp-mremap\n ------------------------\n [INFO] detected THP size: 256 KiB\n [INFO] detected THP size: 512 KiB\n [INFO] detected THP size: 1024 KiB\n [INFO] detected THP size: 2048 KiB\n [INFO] detected hugetlb page size: 2048 KiB\n [INFO] detected hugetlb page size: 1048576 KiB\n 1..24\n [RUN] test_one_folio(size=65536, private=false, swapout=false,\n hugetlb=false)\n not ok 1 uffd_register() failed\n [RUN] test_one_folio(size=65536, private=true, swapout=false,\n hugetlb=false)\n not ok 2 uffd_register() failed\n [RUN] test_one_folio(size=65536, private=false, swapout=true,\n hugetlb=false)\n not ok 3 uffd_register() failed\n [RUN] test_one_folio(size=65536, private=true, swapout=true,\n hugetlb=false)\n not ok 4 uffd_register() failed\n [RUN] test_one_folio(size=262144, private=false, swapout=false,\n hugetlb=false)\n not ok 5 uffd_register() failed\n [RUN] test_one_folio(size=524288, private=false, swapout=false,\n hugetlb=false)\n not ok 6 uffd_register() failed\n .\n .\n .\n Bail out! 24 out of 24 tests failed\n Totals: pass:0 fail:24 xfail:0 xpass:0 skip:0 error:0\n [FAIL]\nnot ok 1 uffd-wp-mremap # exit=1\n\nAfter patch:\n running ./uffd-wp-mremap\n ------------------------\n 1..0 # SKIP uffd-wp feature not supported\n [SKIP]\nok 1 uffd-wp-mremap # SKIP\n\nSigned-off-by: Sayali Patil <sayalip@linux.ibm.com>\n---\n tools/testing/selftests/mm/uffd-wp-mremap.c | 13 +++++++++++++\n 1 file changed, 13 insertions(+)", "diff": "diff --git a/tools/testing/selftests/mm/uffd-wp-mremap.c b/tools/testing/selftests/mm/uffd-wp-mremap.c\nindex 17186d4a4147..8f288484d5f5 100644\n--- a/tools/testing/selftests/mm/uffd-wp-mremap.c\n+++ b/tools/testing/selftests/mm/uffd-wp-mremap.c\n@@ -19,6 +19,17 @@ static size_t thpsizes[20];\n static int nr_hugetlbsizes;\n static size_t hugetlbsizes[10];\n \n+static void check_uffd_wp_feature_supported(void)\n+{\n+\tuint64_t features = 0;\n+\n+\tif (uffd_get_features(&features))\n+\t\tksft_exit_skip(\"failed to get available features (%d)\\n\", errno);\n+\n+\tif (!(features & UFFD_FEATURE_PAGEFAULT_FLAG_WP))\n+\t\tksft_exit_skip(\"uffd-wp feature not supported\\n\");\n+}\n+\n static int detect_thp_sizes(size_t sizes[], int max)\n {\n \tint count = 0;\n@@ -336,6 +347,8 @@ int main(int argc, char **argv)\n \tstruct thp_settings settings;\n \tint i, j, plan = 0;\n \n+\tcheck_uffd_wp_feature_supported();\n+\n \tpagesize = getpagesize();\n \tnr_thpsizes = detect_thp_sizes(thpsizes, ARRAY_SIZE(thpsizes));\n \tnr_hugetlbsizes = detect_hugetlb_page_sizes(hugetlbsizes,\n", "prefixes": [ "v4", "11/15" ] }