中断处理程序可以被抢占吗? [英] Can an interrupt handler be preempted?

问题描述

我知道 linux 执行嵌套中断，其中一个中断可以抢占"另一个中断，但是其他任务呢.

I know that linux does nested interrupts where one interrupt can "preempt" another interrupt, but what about with other tasks.

我只是想了解 linux 如何处理中断.它们可以被其他用户任务/内核任务抢占吗.

I am just trying to understand how linux handles interrupts. Can they be preempted by some other user task/kernel task.

推荐答案

简单回答:一个中断只能被更高优先级的中断中断.

Simple answer: An interrupt can only be interrupted by interrupts of higher priority.

因此中断可以被内核或用户任务中断如果中断的优先级低于内核调度程序中断优先级或用户任务中断优先级.

Therefore an interrupt can be interrupted by the kernel or a user task if the interrupt's priority is lower than the kernel scheduler interrupt priority or user task interrupt priority.

请注意，用户任务"是指用户定义的中断.

Note that by "user task" I mean user-defined interrupt.

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