add_to_page_cache_lru

函数名称：add_to_page_cache_lru

函数原型：int add_to_page_cache_lru(struct page *page, struct address_space *mapping, unsigned long offset, gfp_t gfp_mask)

返回类型：int

参数：

类型	参数	名称
struct page *	page
struct address_space *	mapping
unsigned long	offset
gfp_t	gfp_mask

939

void * shadow = NULL

942

__SetPageLocked(page)

943

ret等于__add_to_page_cache_locked(page, mapping, offset, gfp_mask, & shadow)

945

如果此条件成立可能性小(为编译器优化)(ret)则__ClearPageLocked(page)

947

否则

956

WARN_ON_ONCE(PageActive(page))

957

如果非gfp_mask按位与__GFP_WRITE的值且shadow则workingset_refault(page, shadow)

959

linux/mm/swap.c

961

返回:ret

**调用者**
名称	描述
pagecache_get_page	pagecache_get_page - find and get a page reference@mapping: the address_space to search@offset: the page index@fgp_flags: PCG flags@gfp_mask: gfp mask to use for the page cache data page allocation* Looks up the page cache slot at @mapping & @offset.
generic_file_buffered_read	generic_file_buffered_read - generic file read routine@iocb: the iocb to read@iter: data destination@written: already copied This is a generic file read routine, and uses the* mapping->a_ops->readpage() function for the actual low-level stuff.
do_read_cache_page
read_cache_pages	ad_cache_pages - populate an address space with some pages & start reads against them@mapping: the address_space@pages: The address of a list_head which contains the target pages. These* pages have their ->index populated and are otherwise uninitialised.
read_pages
iomap_next_page
ramfs_nommu_expand_for_mapping	add a contiguous set of pages into a ramfs inode when it's truncated from* size 0 on the assumption that it's going to be used for an mmap of shared* memory
mpage_readpages	mpage_readpages - populate an address space with some pages & start reads against them@mapping: the address_space@pages: The address of a list_head which contains the target pages. These

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