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GET /api/1.2/patches/2219938/?format=api
{ "id": 2219938, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2219938/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260405125240.2558577-14-songmuchun@bytedance.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": "<20260405125240.2558577-14-songmuchun@bytedance.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260405125240.2558577-14-songmuchun@bytedance.com/", "date": "2026-04-05T12:52:04", "name": "[13/49] mm: integrate sparse_vmemmap_init_nid_late() into sparse_init_nid()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "34dddb3aaba74fa4496d9e2c377d24c489264174", "submitter": { "id": 78930, "url": "http://patchwork.ozlabs.org/api/1.2/people/78930/?format=api", "name": "Muchun Song", "email": "songmuchun@bytedance.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260405125240.2558577-14-songmuchun@bytedance.com/mbox/", "series": [ { "id": 498783, "url": "http://patchwork.ozlabs.org/api/1.2/series/498783/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=498783", "date": "2026-04-05T12:51:51", "name": "mm: Generalize vmemmap optimization for DAX and HugeTLB", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498783/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2219938/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2219938/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19343-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=bytedance.com header.i=@bytedance.com\n header.a=rsa-sha256 header.s=google header.b=Ar1A4Yy7;\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; 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Howlett\" <Liam.Howlett@oracle.com>,\n\tVlastimil Babka <vbabka@kernel.org>,\n\tMike Rapoport <rppt@kernel.org>,\n\tSuren Baghdasaryan <surenb@google.com>,\n\tMichal Hocko <mhocko@suse.com>,\n\tNicholas Piggin <npiggin@gmail.com>,\n\tChristophe Leroy <chleroy@kernel.org>,\n\taneesh.kumar@linux.ibm.com,\n\tjoao.m.martins@oracle.com,\n\tlinux-mm@kvack.org,\n\tlinuxppc-dev@lists.ozlabs.org,\n\tlinux-kernel@vger.kernel.org,\n\tMuchun Song <songmuchun@bytedance.com>", "Subject": "[PATCH 13/49] mm: integrate sparse_vmemmap_init_nid_late() into\n sparse_init_nid()", "Date": "Sun, 5 Apr 2026 20:52:04 +0800", "Message-Id": "<20260405125240.2558577-14-songmuchun@bytedance.com>", "X-Mailer": "git-send-email 2.20.1", "In-Reply-To": "<20260405125240.2558577-1-songmuchun@bytedance.com>", "References": "<20260405125240.2558577-1-songmuchun@bytedance.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-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "Move the call to sparse_vmemmap_init_nid_late() from mm_core_init_early()\ninto sparse_init_nid().\n\nSince sparse_init() has been deferred until after zone initialization,\nthe zone data structures are now available during sparse_init(). This\nsatisfies the requirements of sparse_vmemmap_init_nid_late(), allowing\nit to be moved safely.\n\nThis change unifies the vmemmap initialization steps by placing both\nsparse_vmemmap_init_nid_early() and sparse_vmemmap_init_nid_late()\nwithin the sparse memory initialization logic, making the code structure\nclearer.\n\nSigned-off-by: Muchun Song <songmuchun@bytedance.com>\n---\n mm/mm_init.c | 4 ----\n mm/sparse.c | 2 ++\n 2 files changed, 2 insertions(+), 4 deletions(-)", "diff": "diff --git a/mm/mm_init.c b/mm/mm_init.c\nindex 64363f35ad0d..7a710fcbe3c8 100644\n--- a/mm/mm_init.c\n+++ b/mm/mm_init.c\n@@ -2664,15 +2664,11 @@ void __init __weak mem_init(void)\n \n void __init mm_core_init_early(void)\n {\n-\tint nid;\n-\n \tfree_area_init();\n \t/* Zone data structures are available from here. */\n \thugetlb_cma_reserve();\n \thugetlb_bootmem_alloc();\n \tsparse_init();\n-\tfor_each_node_state(nid, N_MEMORY)\n-\t\tsparse_vmemmap_init_nid_late(nid);\n \tmemmap_init();\n }\n \ndiff --git a/mm/sparse.c b/mm/sparse.c\nindex 5fe0a7e66775..d940b973df66 100644\n--- a/mm/sparse.c\n+++ b/mm/sparse.c\n@@ -383,6 +383,8 @@ static void __init sparse_init_nid(int nid, unsigned long pnum_begin,\n \t}\n \tsparse_usage_fini();\n \tsparse_buffer_fini();\n+\n+\tsparse_vmemmap_init_nid_late(nid);\n }\n \n /*\n", "prefixes": [ "13/49" ] }