update_if_frozen

函数名称：pdate_if_frozen - update whether a cgroup finished freezing*@css: css of interest* Once FREEZING is initiated, transition to FROZEN is lazily updated by* calling this function

函数原型：static void update_if_frozen(struct cgroup_subsys_state *css)

返回类型：void

参数：

类型	参数	名称
struct cgroup_subsys_state *	css

246

freezer等于css_freezer(css)

251

lockdep_assert_held( & freezer_mutex)

253

如果非state按位与CGROUP_FREEZING的值或state按位与his and its descendants frozen 则返回

258

_read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other

260

child等于css_freezer(pos)

262

如果state按位与zer is fully online 且非state按位与his and its descendants frozen 的值则

264

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

265

268

271

ss_task_iter_start - initiate task iteration*@css: the css to walk tasks of*@flags: CSS_TASK_ITER_* flags*@it: the task iterator to use* Initiate iteration through the tasks of @css

273

当task等于ss_task_iter_next - return the next task for the iterator*@it: the task iterator being iterated* The "next" function for task iteration. @it should have been* initialized via css_task_iter_start(). Returns NULL when the iteration* reaches the end.循环

274

如果freezing(task)则

281

如果非frozen(task)且非freezer_should_skip(task)则转到:out_iter_end

286

state或等于his and its descendants frozen

287

out_iter_end :

288

ss_task_iter_end - finish task iteration*@it: the task iterator to finish* Finish task iteration started by css_task_iter_start().

**调用者**
名称	描述
freezer_read

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