count_mm_mlocked_page

函数名称：Go through vma areas and sum size of mlocked* vma pages, as return value.* Note deferred memory locking case(mlock2(,,MLOCK_ONFAULT)* is also counted.* Return value: previously mlocked page counts

函数原型：static unsigned long count_mm_mlocked_page_nr(struct mm_struct *mm, unsigned long start, size_t len)

返回类型：unsigned long

参数：

类型	参数	名称
struct mm_struct *	mm
unsigned long	start
size_t	len

643

count等于0

645

如果(mm == NULL)则mm等于mm

648

vma等于Look up the first VMA which satisfies addr < vm_end, NULL if none.

649

如果(vma == NULL)则vma等于 list of VMAs

652

以vma 循环

653

如果start大于等于The first byte after our end addresswithin vm_mm. 则继续下一循环

655

如果start加len小于等于Our start address within vm_mm. 则退出

657

如果Flags, see mm.h. 按位与VM_LOCKED则

658

如果start大于Our start address within vm_mm. 则count减等于start减Our start address within vm_mm.

660

如果start加len小于The first byte after our end addresswithin vm_mm. 则

661

count加等于start加len减Our start address within vm_mm.

662

退出

664

count加等于The first byte after our end addresswithin vm_mm. 减Our start address within vm_mm.

668

返回:count右移PAGE_SHIFT determines the page size 位

**调用者**
名称	描述
do_mlock

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