Think about this from the OS point of view. When an interrupt comes in, where is the data? That is not the answer, but a good hint. Given what you know about interrupt processing, explain why it is critical to have both a user-mode stack and a kernel-mode stack. (This means that the stacks are separated by address space. The user stack is in user memory, and the kernel stack is in kernel memory). Note that "critical" does not mean "a good idea". Correct operation is at stake. It's critical to have both a user-mode stack and a kernal mode stack because when an interrupt occurs there needs to be a switch from of an the user-mode stack to Kernal mode stack to handle it. If there was only one stack between the usermode and kernal mode, during the processing interrupt, important information may be overwritten and the space in the stack may run out. Having a stack for each with its own information will help ensure data integrity.

Think about this from the OS point of view. When an interrupt comes in, where is the data? That is not the answer, but a good hint. Given what you know about interrupt processing, explain why it is critical to have both a user-mode stack and a kernel-mode stack. (This means that the stacks are separated by address space. The user stack is in user memory, and the kernel stack is in kernel memory). Note that "critical" does not mean "a good idea". Correct operation is at stake. It's critical to have both a user-mode stack and a kernal mode stack because when an interrupt occurs there needs to be a switch from of an the user-mode stack to Kernal mode stack to handle it. If there was only one stack between the usermode and kernal mode, during the processing interrupt, important information may be overwritten and the space in the stack may run out. Having a stack for each with its own information will help ensure data integrity.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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