From 61167ad5fecdeaa037f3df1ba354dddd5f66a1ed Mon Sep 17 00:00:00 2001 From: Yajun Deng Date: Mon, 19 Jun 2023 10:34:06 +0800 Subject: 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 Reviewed-by: Mike Rapoport (IBM) Signed-off-by: Andrew Morton --- mm/mm_init.c | 30 +++++++++++++++++------------- 1 file changed, 17 insertions(+), 13 deletions(-) (limited to 'mm/mm_init.c') diff --git a/mm/mm_init.c b/mm/mm_init.c index 122e9bf3fa73..7ffa609673ea 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -646,10 +646,8 @@ static inline void pgdat_set_deferred_range(pg_data_t *pgdat) } /* Returns true if the struct page for the pfn is initialised */ -static inline bool __meminit early_page_initialised(unsigned long pfn) +static inline bool __meminit early_page_initialised(unsigned long pfn, int nid) { - int nid = early_pfn_to_nid(pfn); - if (node_online(nid) && pfn >= NODE_DATA(nid)->first_deferred_pfn) return false; @@ -695,15 +693,14 @@ defer_init(int nid, unsigned long pfn, unsigned long end_pfn) return false; } -static void __meminit init_reserved_page(unsigned long pfn) +static void __meminit init_reserved_page(unsigned long pfn, int nid) { pg_data_t *pgdat; - int nid, zid; + int zid; - if (early_page_initialised(pfn)) + if (early_page_initialised(pfn, nid)) return; - nid = early_pfn_to_nid(pfn); pgdat = NODE_DATA(nid); for (zid = 0; zid < MAX_NR_ZONES; zid++) { @@ -717,7 +714,7 @@ static void __meminit init_reserved_page(unsigned long pfn) #else static inline void pgdat_set_deferred_range(pg_data_t *pgdat) {} -static inline bool early_page_initialised(unsigned long pfn) +static inline bool early_page_initialised(unsigned long pfn, int nid) { return true; } @@ -727,7 +724,7 @@ static inline bool defer_init(int nid, unsigned long pfn, unsigned long end_pfn) return false; } -static inline void init_reserved_page(unsigned long pfn) +static inline void init_reserved_page(unsigned long pfn, int nid) { } #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ @@ -738,7 +735,8 @@ static inline void init_reserved_page(unsigned long pfn) * marks the pages PageReserved. The remaining valid pages are later * sent to the buddy page allocator. */ -void __meminit reserve_bootmem_region(phys_addr_t start, phys_addr_t end) +void __meminit reserve_bootmem_region(phys_addr_t start, + phys_addr_t end, int nid) { unsigned long start_pfn = PFN_DOWN(start); unsigned long end_pfn = PFN_UP(end); @@ -747,7 +745,7 @@ void __meminit reserve_bootmem_region(phys_addr_t start, phys_addr_t end) if (pfn_valid(start_pfn)) { struct page *page = pfn_to_page(start_pfn); - init_reserved_page(start_pfn); + init_reserved_page(start_pfn, nid); /* Avoid false-positive PageTail() */ INIT_LIST_HEAD(&page->lru); @@ -2572,8 +2570,14 @@ void __init set_dma_reserve(unsigned long new_dma_reserve) void __init memblock_free_pages(struct page *page, unsigned long pfn, unsigned int order) { - if (!early_page_initialised(pfn)) - return; + + if (IS_ENABLED(CONFIG_DEFERRED_STRUCT_PAGE_INIT)) { + int nid = early_pfn_to_nid(pfn); + + if (!early_page_initialised(pfn, nid)) + return; + } + if (!kmsan_memblock_free_pages(page, order)) { /* KMSAN will take care of these pages. */ return; -- cgit v1.2.3