page_to_pgoff

函数名称：Get the offset in PAGE_SIZE.* (TODO: hugepage should have ->index in PAGE_SIZE)

函数原型：static inline unsigned long page_to_pgoff(struct page *page)

返回类型：unsigned long

参数：

类型	参数	名称
struct page *	page

425

如果此条件成立可能性小(为编译器优化)(PageHeadHuge() only returns true for hugetlbfs head page, but not for* normal or transparent huge pages.)则返回: Our offset within mapping. 左移compound_order(page)位

428

返回:Get index of the page with in radix-tree* (TODO: remove once hugetlb pages will have ->index in PAGE_SIZE)

**调用者**
名称	描述
find_lock_entry	d_lock_entry - locate, pin and lock a page cache entry@mapping: the address_space to search@offset: the page cache index* Looks up the page cache slot at @mapping & @offset. If there is a* page cache page, it is returned locked and with an increased
filemap_fault	lemap_fault - read in file data for page fault handling@vmf: struct vm_fault containing details of the fault filemap_fault() is invoked via the vma operations vector for a* mapped memory region to read in file data during a page fault
__dump_page
__page_check_anon_rmap	__page_check_anon_rmap - sanity check anonymous rmap addition@page: the page to add the mapping to@vma: the vm area in which the mapping is added*@address: the user virtual address mapped
rmap_walk_anon	map_walk_anon - do something to anonymous page using the object-based* rmap method@page: the page to be handled@rwc: control variable according to each walk type* Find all the mappings of a page using the mapping pointer and the vma chains
rmap_walk_file	map_walk_file - do something to file page using the object-based rmap method@page: the page to be handled@rwc: control variable according to each walk type* Find all the mappings of a page using the mapping pointer and the vma chains
collect_procs_anon	Collect processes when the error hit an anonymous page.
collect_procs_file	Collect processes when the error hit a file mapped page.
__vma_address	At what user virtual address is page expected in @vma?

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