CONFIG_DEBUG_ATOMIC_SLEEP选项主要用来排查是否在一个ATOMIC操作的上下文中有函数发生sleep行为,关于什么是 ATOMIC操作,内核源码在might_sleep函数前也有一段注释:this macro will print a stack trace if it is executed in an atomic context (spinlock, irq-handler, ...) 所以,一个进程获得了spinlock之后(进入...
所以让CONFIG_DEBUG_ATOMIC_SLEEP选项打开,可以捕捉到在一个atomic context中是否发生了sleep,如果你的代码不小心在某处的确出现了这种情形,那么might_sleep会通过后续的printk以及 dump_stack来协助你发现这种情形。 至于__might_sleep函数中的system_state,它是一个全局性的enum型变量,主要用来记录当前系统的状态: enum...
__might_sleep正是根据这些信息来判断当前正在执行的代码上下文是否是个atomic,如果不是,那么函数就直接返回了,因为一切正常。如果是,那么代码下行。 所以让CONFIG_DEBUG_ATOMIC_SLEEP选项打开,可以捕捉到在一个atomic context中是否发生了sleep,如果你的代码不小心在某处的确出现了这种情形,那么might_sleep会通过后续的pr...
() might sleep。...如果你想看源码,我把它列在下面: # define might_resched() do { } while (0) # define might_sleep() do { might_resched(...所以对于release版的kernel image而言,might_sleep的作用仅仅是一个annotation,提醒使用者,一个使用might_sleep的函数在其后的代码执行中可能会sleep。......
简单地说,如果没有调试的需求(绝大多数下你平常跑的系统都是release版本的kernel),那么这个宏(或者函数,称谓并不重要)什么实质性的活都不干,内核只是用它来做一件事,就是提醒你,调用该函数的函数可能会sleep,这个跟其名字也是匹配的: The function calling might_sleep() might sleep。如果你想看源码,我把它列...
It's important to note that during testing, you shouldn't merely usetokio::spawn + tokio::time::sleepfor concurrency testing. For simple memory structures, the system can sometimes recover memory, but when dealing with complex coroutines in hyper or axum, you can't guarantee memory contraction...
源码中在postgres.c文件的errdetail_recovery_conflict函数,可以看到比上面要多一种冲突类型。 static int errdetail_recovery_conflict(void) { switch (RecoveryConflictReason) { case PROCSIG_RECOVERY_CONFLICT_BUFFERPIN: errdetail("User was holding shared buffer pin for too long."); ...
a上课的时候老是想睡觉 Attends class time always wants to sleep[translate] a制定并落实"四面一关怀"政策。保护艾滋病病人合法权益,有效进行医疗救治,改善生活条件,防止艾滋病传播。 正在翻译,请等待...[translate] a吃中饭了吗 Had the lunch[translate] ...
(her heart fluttering in her chest) 原文摘 分享103 怡衣日记吧 winganglener may 13th 2015 sunday but it is wednesdayI wake up around 5:15AM ,but i sitll want to get some sleep.At time is 7:10 Am i rise my body who have a seat on the floor to play computer 分享25赞 柳柳说吧...
ain perceiving what is beyond the classical formulation of utility functions, one might even introduce happiness attributes in transport models, in order to better understand the decision process of users 在察觉什么是在效用函数的古典公式化之外,你在运输模型也许甚而介绍幸福属性,为了更好了解用户的判定过程...