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/Linux-v6.1/mm/
Dpage_alloc.c9598 struct page *page_head = page - (pfn & ((1 << order) - 1)); in is_free_buddy_page() local
9600 if (PageBuddy(page_head) && in is_free_buddy_page()
9601 buddy_order_unsafe(page_head) >= order) in is_free_buddy_page()
9657 struct page *page_head = page - (pfn & ((1 << order) - 1)); in take_page_off_buddy() local
9658 int page_order = buddy_order(page_head); in take_page_off_buddy()
9660 if (PageBuddy(page_head) && page_order >= order) { in take_page_off_buddy()
9661 unsigned long pfn_head = page_to_pfn(page_head); in take_page_off_buddy()
9662 int migratetype = get_pfnblock_migratetype(page_head, in take_page_off_buddy()
9665 del_page_from_free_list(page_head, zone, page_order); in take_page_off_buddy()
9666 break_down_buddy_pages(zone, page_head, page, 0, in take_page_off_buddy()
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Dhugetlb.c1905 int PageHeadHuge(struct page *page_head) in PageHeadHuge() argument
1907 if (!PageHead(page_head)) in PageHeadHuge()
1910 return page_head[1].compound_dtor == HUGETLB_PAGE_DTOR; in PageHeadHuge()
1936 struct page *page_head = compound_head(page); in hugetlb_basepage_index() local
1937 pgoff_t index = page_index(page_head); in hugetlb_basepage_index()
1940 if (compound_order(page_head) >= MAX_ORDER) in hugetlb_basepage_index()
1941 compound_idx = page_to_pfn(page) - page_to_pfn(page_head); in hugetlb_basepage_index()
1943 compound_idx = page - page_head; in hugetlb_basepage_index()
1945 return (index << compound_order(page_head)) + compound_idx; in hugetlb_basepage_index()