do_mincore

函数名称：Do a chunk of "sys_mincore()". We've already checked* all the arguments, we hold the mmap semaphore: we should* just return the amount of info we're asked for.

函数原型：static long do_mincore(unsigned long addr, unsigned long pages, unsigned char *vec)

返回类型：long

参数：

类型	参数	名称
unsigned long	addr
unsigned long	pages
unsigned char *	vec

213

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

214

如果非vma或addr小于Our start address within vm_mm. 则返回:负ENOMEM

216

end等于两数取小(The first byte after our end addresswithin vm_mm. , addr + (pages << PAGE_SHIFT determines the page size ))

217

如果非can_do_mincore(vma)则

218

pages等于DIV_ROUND_UP(end - addr, PAGE_SIZE)

219

memset(vec, 1, pages)

220

返回:pages

222

err等于walk_page_range(The address space we belong to. , addr, end, & mincore_walk_ops, vec)

223

如果err小于0则返回:err

225

返回:end减addr右移PAGE_SHIFT determines the page size 位

**调用者**
名称	描述
SYSCALL_DEFINE3	The mincore(2) system call

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