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GET /api/patches/2220080/?format=api
{ "id": 2220080, "url": "http://patchwork.ozlabs.org/api/patches/2220080/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/a4c1dd0e2b83cc06ea84bd04e6a86ca6d51efb67.1775466330.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": "<a4c1dd0e2b83cc06ea84bd04e6a86ca6d51efb67.1775466330.git.sayalip@linux.ibm.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/a4c1dd0e2b83cc06ea84bd04e6a86ca6d51efb67.1775466330.git.sayalip@linux.ibm.com/", "date": "2026-04-06T09:19:29", "name": "[v4,10/15] 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/people/92656/?format=api", "name": "Sayali Patil", "email": "sayalip@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/a4c1dd0e2b83cc06ea84bd04e6a86ca6d51efb67.1775466330.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/2220080/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220080/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19395-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=eOxNig6o;\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=UfapbF0MIYNL4g108\n\tuLsimu5HpFg3RBNrsbl+T8DHIM=; b=eOxNig6oTRdpY1BLjRBQF4rkVeX2jBYcg\n\tb9flBQGOk8XaoidcPn1xpY4XGvhy88CPJITjGRgTlXokARHrQ6h6m9R8GkPuRgTO\n\tjzpqef/ir04S1JjYZmv18kIFmH+IipYmEYWrdWSKcXBPRmhkgBA/Hqpgf6CD853F\n\tdPMXqTAdxMRVfEu6wrC0winXDsDKQInmIhm6JKzWyrK8jK7E4pkNXexgYERC3sBN\n\tUKZOdfBr5UZip5qPt4Ap6B5veoXYPTu4vyAHSkcUOvkSbZhmFl1S7kaZ+RveGtN5\n\tnyhIo3z46uThetBX6+oYEaHSH7cnqUX/bjOcWI2V/RAtVBP38zCqQ==", "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 10/15] selftests/mm: ensure destination is hugetlb-backed\n in hugepage-mremap", "Date": "Mon, 6 Apr 2026 14:49:29 +0530", "Message-ID": "\n <a4c1dd0e2b83cc06ea84bd04e6a86ca6d51efb67.1775466330.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-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDA2MDA5MCBTYWx0ZWRfX+HqQvBPdjI7l\n xJZzg1OYzfGqyyWy8z2HbMBNarIa5WnTMvJ939WW/jsPwV123cUm09LKGl0KuI41Ic2kxvHjefa\n jgzq96VCO6nWli5GgbySQsa14E5gxAZ6vbYBbFbAER4lRSUp6Af3c8Hz69/cRuXPbWIVOXCE3tt\n UZ0uVsei/lmKV8eXkBV27BononKdJR1dYATNTA1yDfgwVdSQT5YaAOFm+0CEmTSmihBzS25X5m7\n 2gYGFfR43ZoyG1cfk5Ub4XEedRx2rH8W97CkfvEr39N/ZK17dGxyQBoRa+V9xnj/N68kPIr7xM7\n BMrtS1ZLqrqXvHVpIqczlPAX1AFfRBjw0RD/+Kq+3KtkpkzNHX6hsO4ISsZQIXNRoUj4qSRzU4I\n K6pLThgKBUoiUP4dVITKKCgYRs0Qry+pNw/vrucArkMjAd38NRN/fkU/0+4hE/54UlxmPEENsas\n BXoK2x8SrUAIkI0eaqg==", "X-Proofpoint-GUID": "V2FNifgevaR4390n-0H9S2FXFBMEu_vI", "X-Proofpoint-ORIG-GUID": "gl3H62yxUwUu_yrP0KNZSQ1Ea8nJuzTm", "X-Authority-Analysis": "v=2.4 cv=HJvO14tv c=1 sm=1 tr=0 ts=69d37ad9 cx=c_pps\n a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17\n a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=KgDUTMtFSFkb7SMnqUgA: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=2026-04-06_02,2026-04-03_01,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n impostorscore=0 suspectscore=0 clxscore=1015 lowpriorityscore=0 adultscore=0\n malwarescore=0 spamscore=0 phishscore=0 priorityscore=1501 bulkscore=0\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 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\")\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": [ "v4", "10/15" ] }