0x02 A glance into the kernel: Overview on kernel services

Wednesday, February 26, 2020


I’d write down my own answers, please point out my errors with no mercy.

I have to think more on these questions.


Describe a scenario in which the timer-wheel algorithm used for the callout queue does not work well. Suggest an alternative data structure that runs more quickly than does the timer-wheel algorithm for your scenario.


The SIGPROF profiling timer was originally intended to replace the profil system call to collect a statistical sampling of a program’s program counter. Give two reasons why thr profil facility had to be retained.


What weakness in the process-accounting mechanism makes the latter unsuitable for use in a commercial environment?

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0x03 A glance into the kernel: Proc source

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