do_page_add_anon

函数名称：Special version of the above for do_swap_page, which often runs* into pages that are exclusively owned by the current process.* Everybody else should continue to use page_add_anon_rmap above.

函数原型：void do_page_add_anon_rmap(struct page *page, struct vm_area_struct *vma, unsigned long address, int flags)

返回类型：void

参数：

类型	参数	名称
struct page *	page
struct vm_area_struct *	vma
unsigned long	address
int	flags

1121

compound等于flags按位与RMAP_COMPOUND

1124

如果compound则

1126

VM_BUG_ON_PAGE(!PageLocked(page), page)

1127

VM_BUG_ON_PAGE(!PageHuge() only returns true for hugetlbfs pages, but not for* normal or transparent huge pages.* PageTransHuge() returns true for both transparent huge and* hugetlbfs pages, but not normal pages. PageTransHuge() can only be, page)

1128

mapcount等于compound_mapcount_ptr(page)

1129

first等于atomic_inc_and_test(mapcount)

1130

否则

1131

first等于atomic_inc_and_test( & * If the page can be mapped to userspace, encodes the number * of times this page is referenced by a page table.)

1134

如果first则

1135

nr等于如果compound则hpage_nr_pages(page)否则1

1142

如果compound则__inc_node_page_state(page, NR_ANON_THPS)

1144

__mod_node_page_state(page_pgdat(page), Mapped anonymous pages , nr)

1146

如果此条件成立可能性小(为编译器优化)(A KSM page is one of those write-protected "shared pages" or "merged pages"* which KSM maps into multiple mms, wherever identical anonymous page content* is found in VM_MERGEABLE vmas. It's a PageAnon page, pointing not to any)则返回

1149

VM_BUG_ON_PAGE(!PageLocked(page), page)

1152

如果first则__page_set_anon_rmap - set up new anonymous rmap*@page: Page or Hugepage to add to rmap*@vma: VM area to add page to.*@address: User virtual address of the mapping *@exclusive: the page is exclusively owned by the current process

1155

否则__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

**调用者**
名称	描述
page_add_anon_rmap	page_add_anon_rmap - add pte mapping to an anonymous page@page: the page to add the mapping to@vma: the vm area in which the mapping is added@address: the user virtual address mapped@compound: charge the page as compound or small page* The caller
do_swap_page	We enter with non-exclusive mmap_sem (to exclude vma changes,* but allow concurrent faults), and pte mapped but not yet locked.* We return with pte unmapped and unlocked.* We return with the mmap_sem locked or unlocked in the same cases

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

函数逻辑报告