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| author | Muchun Song <songmuchun@bytedance.com> | 2026-09-10 14:32:49 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-10-06 17:38:51 -0700 |
| commit | b8abb1c0c40f1f82e8dbd7986a531d5229e62f01 (patch) | |
| tree | b41181fcc31e2f13701be2d754d36eb3568bb22b /include/linux | |
| parent | 74d2a4e89f19bac902d4139427143096ceeec60d (diff) | |
| download | linux-b8abb1c0c40f1f82e8dbd7986a531d5229e62f01.tar.gz linux-b8abb1c0c40f1f82e8dbd7986a531d5229e62f01.zip | |
mm/hugetlb: switch HugeTLB to section-based vmemmap optimization
HugeTLB bootmem vmemmap optimization still carries its own early setup
path, including pre-populating optimized mappings before the generic
sparse-vmemmap code runs.
Now that the section-based vmemmap optimization can derive HugeTLB vmemmap
deduplication from section metadata, HugeTLB only needs to mark the
bootmem huge page range with the appropriate order. The generic
sparse-vmemmap population path can then allocate and map the shared tail
vmemmap pages without any HugeTLB-specific early population code.
Do that by recording the compound page order when a bootmem huge page is
allocated and dropping the dedicated pre-HVO helpers and related
special-casing.
This removes duplicate early setup logic and switches HugeTLB to the
section-based vmemmap optimization path.
Link: https://lore.kernel.org/20260910063256.64386-11-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: Qi Zheng <qi.zheng@linux.dev>
Cc: David Hildenbrand (Arm) <david@kernel.org>
Cc: David Laight <david.laight.linux@gmail.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/hugetlb.h | 1 | ||||
| -rw-r--r-- | include/linux/mm.h | 3 |
2 files changed, 0 insertions, 4 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 16c4c4caa126..fe28f98e1b22 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -171,7 +171,6 @@ struct address_space *hugetlb_folio_mapping_lock_write(struct folio *folio); extern int movable_gigantic_pages __read_mostly; extern int sysctl_hugetlb_shm_group __read_mostly; -extern struct list_head huge_boot_pages[MAX_NUMNODES]; void hugetlb_bootmem_struct_page_init(void); void hugetlb_bootmem_alloc(void); diff --git a/include/linux/mm.h b/include/linux/mm.h index dd09c438fa23..441bd39eab73 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -5159,9 +5159,6 @@ int vmemmap_populate_hugepages(unsigned long start, unsigned long end, int node, struct vmem_altmap *altmap); int vmemmap_populate(unsigned long start, unsigned long end, int node, struct vmem_altmap *altmap); -int vmemmap_populate_hvo(unsigned long start, unsigned long end, - unsigned int order, struct zone *zone, - unsigned long headsize); void vmemmap_wrprotect_hvo(unsigned long start, unsigned long end, int node, unsigned long headsize); void vmemmap_populate_print_last(void); |