page_to_pgoff

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

Proto:static inline unsigned long page_to_pgoff(struct page *page)

Type:unsigned long

Parameter:

Type	Parameter	Name
struct page *	page

425

If Value for the false possibility is greater at compile time(PageHeadHuge() only returns true for hugetlbfs head page, but not for* normal or transparent huge pages.) Then Return Our offset within mapping. << compound_order(page)

428

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

**Caller**
Name	Describe
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.

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