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| author | Yajun Deng <yajun.deng@linux.dev> | 2023-06-19 10:34:06 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-06-23 16:59:27 -0700 |
| commit | 61167ad5fecdeaa037f3df1ba354dddd5f66a1ed (patch) | |
| tree | b0e08754150ba76f267e9181f2a6173f2d99776c /include/linux/mm.h | |
| parent | 9883c7f84053cec2826ca3c56254601b5ce9cdbe (diff) | |
| download | linux-61167ad5fecdeaa037f3df1ba354dddd5f66a1ed.tar.gz | |
mm: pass nid to reserve_bootmem_region()
early_pfn_to_nid() is called frequently in init_reserved_page(), it
returns the node id of the PFN. These PFN are probably from the same
memory region, they have the same node id. It's not necessary to call
early_pfn_to_nid() for each PFN.
Pass nid to reserve_bootmem_region() and drop the call to
early_pfn_to_nid() in init_reserved_page(). Also, set nid on all reserved
pages before doing this, as some reserved memory regions may not be set
nid.
The most beneficial function is memmap_init_reserved_pages() if
CONFIG_DEFERRED_STRUCT_PAGE_INIT is enabled.
The following data was tested on an x86 machine with 190GB of RAM.
before:
memmap_init_reserved_pages() 67ms
after:
memmap_init_reserved_pages() 20ms
Link: https://lkml.kernel.org/r/20230619023406.424298-1-yajun.deng@linux.dev
Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index cf43deb25553d..9ecb8b9c07f6b 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2940,7 +2940,8 @@ extern unsigned long free_reserved_area(void *start, void *end, extern void adjust_managed_page_count(struct page *page, long count); -extern void reserve_bootmem_region(phys_addr_t start, phys_addr_t end); +extern void reserve_bootmem_region(phys_addr_t start, + phys_addr_t end, int nid); /* Free the reserved page into the buddy system, so it gets managed. */ static inline void free_reserved_page(struct page *page) |