函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\smpboot.c Create Date:2022-07-27 10:34:25
Last Modify:2020-03-12 14:18:49 Copyright©Brick
首页 函数Tree
注解内核,赢得工具下载SCCTEnglish

函数名称：smpboot_thread_fn - percpu hotplug thread loop function*@data: thread data pointer* Checks for thread stop and park conditions. Calls the necessary* setup, cleanup, park and unpark functions for the registered* thread.

函数原型：static int smpboot_thread_fn(void *data)

返回类型：int

参数：

类型参数名称
void *data
109  td等于data
110  ht等于ht
112  当1循环
113  set_current_state(睡眠态)
114  禁止抢占()
115  如果kthread_should_stop - should this kthread return now?* When someone calls kthread_stop() on your kthread, it will be woken* and this will return true. You should then return, and your return* value will be passed through to kthread_stop().则
116  set_current_state() includes a barrier so that the write of current->state* is correctly serialised wrt the caller's subsequent test of whether to* actually sleep:* for (;;) {* set_current_state(TASK_UNINTERRUPTIBLE);* if (!need_sleep)* break;* (就绪态)
117  禁用抢占和中断()
119  如果cleanup且status不等于HP_THREAD_NONE则cleanup(cpu, cpu_online(cpu))
121  释放内存
122  返回:0
125  如果kthread_should_park - should this kthread park now?* When someone calls kthread_park() on your kthread, it will be woken* and this will return true则
126  set_current_state() includes a barrier so that the write of current->state* is correctly serialised wrt the caller's subsequent test of whether to* actually sleep:* for (;;) {* set_current_state(TASK_UNINTERRUPTIBLE);* if (!need_sleep)* break;* (就绪态)
127  禁用抢占和中断()
128  如果park且status恒等于HP_THREAD_ACTIVE则
129  BUG_ON(cpu != 当前cpu ID())
130  park(cpu)
131  status等于HP_THREAD_PARKED
133  kthread_parkme()
135  继续下一循环
138  BUG_ON(cpu != 当前cpu ID())
142  当:status恒等于HP_THREAD_NONE
143  set_current_state() includes a barrier so that the write of current->state* is correctly serialised wrt the caller's subsequent test of whether to* actually sleep:* for (;;) {* set_current_state(TASK_UNINTERRUPTIBLE);* if (!need_sleep)* break;* (就绪态)
144  禁用抢占和中断()
145  如果setup则setup(cpu)
147  status等于HP_THREAD_ACTIVE
148  继续下一循环
150  当:status恒等于HP_THREAD_PARKED
151  set_current_state() includes a barrier so that the write of current->state* is correctly serialised wrt the caller's subsequent test of whether to* actually sleep:* for (;;) {* set_current_state(TASK_UNINTERRUPTIBLE);* if (!need_sleep)* break;* (就绪态)
152  禁用抢占和中断()
153  如果unpark则unpark(cpu)
155  status等于HP_THREAD_ACTIVE
156  继续下一循环
159  如果非thread_should_run(cpu)则
160  preempt_enable_no_resched()
161  schedule()
162  否则
163  set_current_state() includes a barrier so that the write of current->state* is correctly serialised wrt the caller's subsequent test of whether to* actually sleep:* for (;;) {* set_current_state(TASK_UNINTERRUPTIBLE);* if (!need_sleep)* break;* (就绪态)
164  禁用抢占和中断()
165  thread_fn(cpu)