hugetlbfs_pagecache

函数名称：Return whether there is a pagecache page to back given address within VMA.* Caller follow_hugetlb_page() holds page_table_lock so we cannot lock_page.

函数原型：static bool hugetlbfs_pagecache_present(struct hstate *h, struct vm_area_struct *vma, unsigned long address)

返回类型：bool

参数：

类型	参数	名称
struct hstate *	h
struct vm_area_struct *	vma
unsigned long	address

3756

mapping等于f_mapping

3757

idx等于Convert the address within this vma to the page offset within* the mapping, in pagecache page units; huge pages here.

3759

page等于d_get_page - find and get a page reference*@mapping: the address_space to search*@offset: the page index* Looks up the page cache slot at @mapping & @offset. If there is a* page cache page, it is returned with an increased refcount.

3760

如果page则Perform a free_page(), also freeing any swap cache associated with* this page if it is the last user of the page.

3762

返回:page != NULL

**调用者**
名称	描述
follow_hugetlb_page

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