read_swap_cache

函数名称：Locate a page of swap in physical memory, reserving swap cache space* and reading the disk if it is not already cached.* A failure return means that either the page allocation failed or that* the swap entry is no longer in use.

函数原型：struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask, struct vm_area_struct *vma, unsigned long addr, bool do_poll)

返回类型：struct page

参数：

类型	参数	名称
swp_entry_t	entry
gfp_t	gfp_mask
struct vm_area_struct *	vma
unsigned long	addr
bool	do_poll

452

retpage等于__read_swap_cache_async(entry, gfp_mask, vma, addr, & page_was_allocated)

455

如果page_was_allocated则swap_readpage(retpage, do_poll)

458

返回:retpage

**调用者**
名称	描述
swap_cluster_readahead	swap_cluster_readahead - swap in pages in hope we need them soon@entry: swap entry of this memory@gfp_mask: memory allocation flags@vmf: fault information Returns the struct page for entry and addr, after queueing swapin.
swap_vma_readahead	swap_vma_readahead - swap in pages in hope we need them soon@entry: swap entry of this memory@gfp_mask: memory allocation flags@vmf: fault information Returns the struct page for entry and addr, after queueing swapin.* Primitive swap readahead code

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