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GET /api/1.2/patches/2232285/?format=api
{ "id": 2232285, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2232285/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/021c74ee2bf9d6dcc5416458d387cc7a1e58b003.1777877814.git.sayalip@linux.ibm.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.2/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": "<021c74ee2bf9d6dcc5416458d387cc7a1e58b003.1777877814.git.sayalip@linux.ibm.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/021c74ee2bf9d6dcc5416458d387cc7a1e58b003.1777877814.git.sayalip@linux.ibm.com/", "date": "2026-05-04T08:24:47", "name": "[v6,10/14] selftests/mm: ensure destination is hugetlb-backed in hugepage-mremap", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9bab1eb558fdf72feefa79208e6eefbb78c63d83", "submitter": { "id": 92656, "url": "http://patchwork.ozlabs.org/api/1.2/people/92656/?format=api", "name": "Sayali Patil", "email": "sayalip@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/021c74ee2bf9d6dcc5416458d387cc7a1e58b003.1777877814.git.sayalip@linux.ibm.com/mbox/", "series": [ { "id": 502625, "url": "http://patchwork.ozlabs.org/api/1.2/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/2232285/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2232285/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-20408-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=fdpEIssm;\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=G5jNpn3lA4nxxcFeR\n\tR2Yggf97NPpXqcmij/yD8SCbb8=; b=fdpEIssmMNtdlwy3Wip1UaEfEj8kV8NuV\n\tbsWp7l2i9dLwf3CUSa/pNxrJ81fkJEXiYDKZqTfHAE2L7adrq8ZmmXum+ZuPkLmO\n\ttA4+ITI+CdRPkz6pWOJCPes8EZpvVefHI7DU/1hxbFnnh22xCEzTAz7uTO4OGJmT\n\tpG9jSOABMtadKPhj3bW5bTdgy5nzd9AJ05wp1Zo0bQ9mwv9GINh6lOZ4/GMcGg7/\n\tmYbtWg3hE4j2zPw9Jkd4Tabll9krdVRJuzMkhpNT/JDN/ow+e6R1neHhAa/2vhXM\n\twlG/Z14PvZolEcs+o6G2Tvk0735plbqPHXjNm1S2bcmG69wbxqxRQ==", "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 10/14] selftests/mm: ensure destination is hugetlb-backed\n in hugepage-mremap", "Date": "Mon, 4 May 2026 13:54:47 +0530", "Message-ID": "\n <021c74ee2bf9d6dcc5416458d387cc7a1e58b003.1777877814.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-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNTA0MDA4NyBTYWx0ZWRfX7NUPgzU6H5aG\n dTG8ZrM9LvVfEr09/1tuWZc+ZJlOEs2duSjOQrieGtZJ4mCi1O2j2P0l9BvUewURhWIjwoTkE37\n z8M6zlRGLVz9MYzFPN9XmfmgTh4movrEUL556YRqC0wjpp/LJ/Y8IhloxcSG3JV290P5/yYf7ev\n vbdFXeaz1PqhEneSAmU+GgLojyAZxm/HdPg44wtDWaPQ+I+Nzonw86O6doRMcFTaJYJsApg00Ci\n NpiBPCFnBrusMC+zQEMXM5a7TaNkWN0HJszFb2qsmdYt7qwA5A+K+pdiZygonRH84+akNZtB+j2\n ifBXBRhcFmodgHNaqLacM2DRu+7WycuqnsOdhQGAWC/9GM4OSnGfH7t3VruU2gmmrBXkKn6MbqD\n YU7ATuzOmYJ2G7EqjNIGeyaxOl2czMq3g045wRaIWIwk6uj88XtXFVUKgUREG7vpC7h/6z6xMZh\n w6DxVtOGMJPgYrBZGhA==", "X-Proofpoint-ORIG-GUID": "2K6-qwYb5JWf8NZfbzS7aBOIcQC1HM3Z", "X-Proofpoint-GUID": "JwLyZOHRS8xhKuQzWUSCdZ6pX2UG6At2", "X-Authority-Analysis": "v=2.4 cv=ctWrVV4i c=1 sm=1 tr=0 ts=69f85808 cx=c_pps\n a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17\n a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=gVE5Qc0x_BWLnb-D2gsA: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=2026-05-04_03,2026-04-30_02,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n priorityscore=1501 lowpriorityscore=0 adultscore=0 clxscore=1015\n suspectscore=0 impostorscore=0 spamscore=0 malwarescore=0 phishscore=0\n bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound\n adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000\n 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": "The hugepage-mremap selftest reserves the destination address using a\nanonymous base-page mapping before calling mremap() with MREMAP_FIXED,\nwhile the source region is hugetlb-backed.\n\nWhen remapping a hugetlb mapping into a base-page VMA may fail with:\n\n mremap: Device or resource busy\n\nThis is observed on powerpc hash MMU systems where slice constraints\nand page size incompatibilities prevent the remap.\n\nEnsure the destination region is created using MAP_HUGETLB so that both\nsource and destination VMAs are hugetlb-backed and compatible.\n\nUpdate the FLAGS macro to include MAP_HUGETLB | MAP_SHARED\nso that both mappings are hugetlb-backed and compatible.\nAlso use the macro for the mmap() calls to avoid repeating\nthe flag combination.\n\nThis ensures the test reliably exercises hugetlb mremap instead of\nfailing due to VMA type mismatch.\n\nFixes: 12b613206474 (\"mm, hugepages: add hugetlb vma mremap() test\")\nTested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>\nSigned-off-by: Sayali Patil <sayalip@linux.ibm.com>\n---\n tools/testing/selftests/mm/hugepage-mremap.c | 11 ++++-------\n 1 file changed, 4 insertions(+), 7 deletions(-)", "diff": "diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c\nindex 68c35d1d8a5f..a442d01908cc 100644\n--- a/tools/testing/selftests/mm/hugepage-mremap.c\n+++ b/tools/testing/selftests/mm/hugepage-mremap.c\n@@ -31,7 +31,7 @@\n #define MB_TO_BYTES(x) (x * 1024 * 1024)\n \n #define PROTECTION (PROT_READ | PROT_WRITE | PROT_EXEC)\n-#define FLAGS (MAP_SHARED | MAP_ANONYMOUS)\n+#define FLAGS (MAP_HUGETLB | MAP_SHARED)\n #define ALIGN(x, a) (((x) + ((a) - 1)) & ~((a) - 1))\n \n static void check_bytes(char *addr)\n@@ -131,23 +131,20 @@ int main(int argc, char *argv[])\n \n \t/* mmap to a PUD aligned address to hopefully trigger pmd sharing. */\n \tunsigned long suggested_addr = 0x7eaa40000000;\n-\tvoid *haddr = mmap((void *)suggested_addr, length, PROTECTION,\n-\t\t\t MAP_HUGETLB | MAP_SHARED | MAP_POPULATE, fd, 0);\n+\tvoid *haddr = mmap((void *)suggested_addr, length, PROTECTION, FLAGS, fd, 0);\n \tksft_print_msg(\"Map haddr: Returned address is %p\\n\", haddr);\n \tif (haddr == MAP_FAILED)\n \t\tksft_exit_fail_msg(\"mmap1: %s\\n\", strerror(errno));\n \n \t/* mmap again to a dummy address to hopefully trigger pmd sharing. */\n \tsuggested_addr = 0x7daa40000000;\n-\tvoid *daddr = mmap((void *)suggested_addr, length, PROTECTION,\n-\t\t\t MAP_HUGETLB | MAP_SHARED | MAP_POPULATE, fd, 0);\n+\tvoid *daddr = mmap((void *)suggested_addr, length, PROTECTION, FLAGS, fd, 0);\n \tksft_print_msg(\"Map daddr: Returned address is %p\\n\", daddr);\n \tif (daddr == MAP_FAILED)\n \t\tksft_exit_fail_msg(\"mmap3: %s\\n\", strerror(errno));\n \n \tsuggested_addr = 0x7faa40000000;\n-\tvoid *vaddr =\n-\t\tmmap((void *)suggested_addr, length, PROTECTION, FLAGS, -1, 0);\n+\tvoid *vaddr = mmap((void *)suggested_addr, length, PROTECTION, FLAGS, fd, 0);\n \tksft_print_msg(\"Map vaddr: Returned address is %p\\n\", vaddr);\n \tif (vaddr == MAP_FAILED)\n \t\tksft_exit_fail_msg(\"mmap2: %s\\n\", strerror(errno));\n", "prefixes": [ "v6", "10/14" ] }