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{ "id": 2225413, "url": "http://patchwork.ozlabs.org/api/1.2/covers/2225413/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/cover/20260421022044.1217503-1-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": "<20260421022044.1217503-1-songmuchun@bytedance.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260421022044.1217503-1-songmuchun@bytedance.com/", "date": "2026-04-21T02:20:40", "name": "[v3,0/4] mm: Fix vmemmap optimization accounting and initialization", "submitter": { "id": 78930, "url": "http://patchwork.ozlabs.org/api/1.2/people/78930/?format=api", "name": "Muchun Song", "email": "songmuchun@bytedance.com" }, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/cover/20260421022044.1217503-1-songmuchun@bytedance.com/mbox/", "series": [ { "id": 500709, "url": "http://patchwork.ozlabs.org/api/1.2/series/500709/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=500709", "date": "2026-04-21T02:20:40", "name": "mm: Fix vmemmap optimization accounting and initialization", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/500709/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2225413/comments/", "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19857-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=AZvTr4q6;\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", "Subject": "[PATCH v3 0/4] mm: Fix vmemmap optimization accounting and\n initialization", "Date": "Tue, 21 Apr 2026 10:20:40 +0800", "Message-Id": "<20260421022044.1217503-1-songmuchun@bytedance.com>", "X-Mailer": "git-send-email 2.20.1", "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": "The series fixes several bugs in vmemmap optimization, mainly about incorrect\npage accounting when vmemmap optimization is enabled for DAX and memory\nhotplug paths. Also fixes the pageblock migratetype initialization for\nZONE_DEVICE compound pages.\n\nv2 -> v3:\n- Drop patch 4 and patch 5 from v2 since the page table sync issue has\n already been fixed by Harry's series.\n- [Patch 1]: Remove an unintentionally left line.\n- [Patch 4 (previously Patch 6)]: Call cond_resched() every\n PAGES_PER_SECTION instead of every compound page, as suggested by\n Mike Rapoport.\n- Collect Acked-by and Reviewed-by tags from Mike Rapoport.\n\nMuchun Song (4):\n mm/sparse-vmemmap: Fix vmemmap accounting underflow\n mm/sparse-vmemmap: Pass @pgmap argument to memory deactivation paths\n mm/sparse-vmemmap: Fix DAX vmemmap accounting with optimization\n mm/mm_init: Fix pageblock migratetype for ZONE_DEVICE compound pages\n\n arch/arm64/mm/mmu.c | 5 +--\n arch/loongarch/mm/init.c | 5 +--\n arch/powerpc/mm/mem.c | 5 +--\n arch/riscv/mm/init.c | 5 +--\n arch/s390/mm/init.c | 5 +--\n arch/x86/mm/init_64.c | 5 +--\n include/linux/memory_hotplug.h | 8 +++--\n mm/memory_hotplug.c | 12 +++----\n mm/memremap.c | 4 +--\n mm/mm_init.c | 43 +++++++++++++++---------\n mm/sparse-vmemmap.c | 61 +++++++++++++++++++++++++---------\n 11 files changed, 104 insertions(+), 54 deletions(-)" }