try_to_merge_with_ksm

函数名称：ry_to_merge_with_ksm_page - like try_to_merge_two_pages,* but no new kernel page is allocated: kpage must already be a ksm page.* This function returns 0 if the pages were merged, -EFAULT otherwise.

函数原型：static int try_to_merge_with_ksm_page(struct rmap_item *rmap_item, struct page *page, struct page *kpage)

返回类型：int

参数：

类型	参数	名称
struct rmap_item *	rmap_item
struct page *	page
struct page *	kpage

1279

mm等于mm

1281

err等于负EFAULT

1283

lock for reading

1284

vma等于find_mergeable_vma(mm, + low bits used for flags below )

1285

如果非vma则转到:out

1288

err等于ry_to_merge_one_page - take two pages and merge them into one*@vma: the vma that holds the pte pointing to page*@page: the PageAnon page that we want to replace with kpage*@kpage: the PageKsm page that we want to map instead of page,

1289

如果err则转到:out

1293

Removing rmap_item from stable or unstable tree.* This function will clean the information from the stable/unstable tree.

1296

when stable 等于Serialized by page_table_lock

1297

get_anon_vma(Serialized by page_table_lock )

1298

out :

1299

lease a read lock

1300

返回:err

**调用者**
名称	描述
try_to_merge_two_pages	ry_to_merge_two_pages - take two identical pages and prepare them* to be merged into one page
cmp_and_merge_page	mp_and_merge_page - first see if page can be merged into the stable tree;* if not, compare checksum to previous and if it's the same, see if page can* be inserted into the unstable tree, or merged with a page already there and

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