#Interrupts #OS Doubt.

Question

When an interrupt occurs, an operating system can ignore the interrupt?

Please tell the answer with reasoning? Thank you!

Comments

@Shaik bhai you know this one?

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When an interrupt occurs, an operating system can ignore the interrupt?

No, OS should be handle it.

But note that, OS handle it when after the completion of currently executing instruction only (i.e, fetch,decode,execute, write back of an instruction. )

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While an interrupt needs to be serviced, the OS can choose to disable interrupts (for eg: to implement a semaphore).

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@Shaik @goxul Thank you guys! :)

Answer 1

Interrupt in OS!

Interrupt means something needs immediate attention!

In OS, a signal with respect to interrupt is generated such that it can be handled or ignored.

The interrupt can be of maskable and non maskable. A maskable interrupt can be ignored. But  non maskable interrupt must be handled immediately.

When an interrupt is going to get processed, the current process state is saved. It will resume from where it was stopped.

Comments

@sarathijayaraman Thank you! :)