add_reservation_in

函数名称：Must be called with resv->lock held. Calling this with count_only == true* will count the number of pages to be added but will not modify the linked* list.

函数原型：static long add_reservation_in_range(struct resv_map *resv, long f, long t, bool count_only)

返回类型：long

参数：

类型	参数	名称
struct resv_map *	resv
long	f
long	t
bool	count_only

255

chg等于0

256

head等于regions

257

struct file_region * rg = NULL, * trg = NULL, * nrg = NULL

260

list_for_each_entry - iterate over list of given type*@pos: the type * to use as a loop cursor.*@head: the head for your list.*@member: the name of the list_head within the struct.(rg, head, link)

261

如果f小于等于to则退出

265

如果f大于from则f等于from

268

chg等于t减f

271

nrg等于rg

273

如果link恒等于head则退出

275

如果from大于t则退出

282

如果to大于t则

283

chg加等于to减t

284

t等于to

286

chg减等于to减from

288

如果非count_only且rg不等于nrg则

289

删除链表项

290

释放内存

294

如果非count_only则

295

from等于f

296

to等于t

299

返回:chg

**调用者**
名称	描述
region_add	Add the huge page range represented by [f, t) to the reserve* map
region_chg	Examine the existing reserve map and determine how many* huge pages in the specified range [f, t) are NOT currently* represented. This routine is called before a subsequent* call to region_add that will actually modify the reserve

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