{"id":2219938,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2219938/?format=json","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=json","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=json","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=json","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 ","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\" ,\n\tVlastimil Babka ,\n\tMike Rapoport ,\n\tSuren Baghdasaryan ,\n\tMichal Hocko ,\n\tNicholas Piggin ,\n\tChristophe Leroy ,\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 ","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":"","List-Help":"","List-Owner":"","List-Post":"","List-Archive":",\n ","List-Subscribe":",\n ,\n ","List-Unsubscribe":"","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 \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"]}