函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\cgroup\legacy_freezer.c Create Date:2022-07-27 12:16:25
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Tasks can be migrated into a different freezer anytime regardless of its* current state. freezer_attach() is responsible for making new tasks* conform to the current state.* Freezer state changes and task migration are synchronized via*@freezer->lock

函数原型：static void freezer_attach(struct cgroup_taskset *tset)

返回类型：void

参数：

类型参数名称
struct cgroup_taskset *tset
163  mutex_lock( & freezer_mutex)
176  freezer等于css_freezer(new_css)
178  如果非state按位与CGROUP_FREEZING的值则
179  __thaw_task(task)
180  否则
181  ze_task - send a freeze request to given task*@p: task to send the request to* If @p is freezing, the freeze request is sent either by sending a fake* signal (if it's not a kernel thread) or waking it up (if it's a kernel* thread)
183  当freezer且state按位与his and its descendants frozen 循环
184  state与等于his and its descendants frozen 的反
185  freezer等于parent_freezer(freezer)
190  mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.