函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\hung_task.c Create Date:2022-07-27 12:49:47
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：kthread which checks for tasks stuck in D state

函数原型：static int watchdog(void *dummy)

返回类型：int

参数：

类型参数名称
void *dummy
273  hung_last_checked等于jiffies
275  set_user_nice(当前进程, 0)
277  循环
278  timeout等于Zero means infinite timeout - no checking done:
279  interval等于Zero (default value) means use sysctl_hung_task_timeout_secs:
282  如果interval恒等于0则interval等于timeout
284  interval等于min_t - return minimum of two values, using the specified type*@type: data type to use*@x: first value*@y: second value(unsignedlong, interval, timeout)
285  t等于hung_timeout_jiffies(hung_last_checked, interval)
286  如果t小于等于0则
287  如果非atomic_xchg( & reset_hung_task, 0)且非hung_detector_suspended则Check whether a TASK_UNINTERRUPTIBLE does not get woken up for* a really long time (120 seconds). If that happens, print out* a warning.
290  hung_last_checked等于jiffies
291  继续下一循环
293  We can use __set_current_state() here because schedule_timeout() calls* schedule() unconditionally.
296  返回:0