compound_mapcount

函数名称：compound_mapcount

函数原型：static inline int compound_mapcount(struct page *page)

返回类型：int

参数：

类型	参数	名称
struct page *	page

685

VM_BUG_ON_PAGE(!PageCompound(page), page)

686

page等于compound_head(page)

687

返回:atomic_read(compound_mapcount_ptr(page))加1

**调用者**
名称	描述
shrink_page_list	shrink_page_list() returns the number of reclaimed pages
__dump_page
free_tail_pages_check
page_trans_huge_map_swapcount
follow_trans_huge_pmd
__split_huge_pmd_locked
total_mapcount
page_trans_huge_mapcount	This calculates accurately how many mappings a transparent hugepage* has (unlike page_mapcount() which isn't fully accurate)
split_huge_page_to_list	This function splits huge page into normal pages. @page can point to any* subpage of huge page to split. Split doesn't change the position of @page.* Only caller must hold pin on the @page, otherwise split fails with -EBUSY.* The huge page must be locked.

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码