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Update linux-interrupts-9.md

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Dou Liyang 2018-05-24 17:22:12 +08:00 committed by GitHub
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Interrupts/linux-interrupts-9.md
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@ -196,7 +196,7 @@ if (!in_interrupt() && local_softirq_pending())
invoke_softirq();
```
that executes the `__do_softirq` too. So what do we have in summary. Each `softirq` goes through the following stages: Registration of a `softirq` with the `open_softirq` function. Activation of a `softirq` by marking it as deferred with the `raise_softirq` function. After this, all marked `softirqs` will be r in the next time the Linux kernel schedules a round of executions of deferrable functions. And execution of the deferred functions that have the same type.
that executes the `__do_softirq` too. So what do we have in summary. Each `softirq` goes through the following stages: Registration of a `softirq` with the `open_softirq` function. Activation of a `softirq` by marking it as deferred with the `raise_softirq` function. After this, all marked `softirqs` will be triggered in the next time the Linux kernel schedules a round of executions of deferrable functions. And execution of the deferred functions that have the same type.
As I already wrote, the `softirqs` are statically allocated and it is a problem for a kernel module that can be loaded. The second concept that built on top of `softirq` -- the `tasklets` solves this problem.