函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\swap_state.c Create Date:2022-07-27 16:44:52
Last Modify:2020-03-17 22:02:06 Copyright©Brick
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函数名称：add_to_swap - allocate swap space for a page*@page: page we want to move to swap* Allocate swap space for the page and add the page to the* swap cache. Caller needs to hold the page lock.

函数原型：int add_to_swap(struct page *page)

返回类型：int

参数：

类型参数名称
struct page *page
193  VM_BUG_ON_PAGE(!PageLocked(page), page)
194  VM_BUG_ON_PAGE(!PageUptodate(page), page)
196  entry等于get_swap_page(page)
197  如果非val则返回:0
211  err等于add_to_swap_cache resembles add_to_page_cache_locked on swapper_space,* but sets SwapCache flag and private instead of mapping and index.
213  如果err则转到:fail
229  Dirty a page
231  返回:1
233  fail :
234  put_swap_page(page, entry)
235  返回:0
调用者
名称描述
shrink_page_listshrink_page_list() returns the number of reclaimed pages