Questions tagged [os-kernel]

Questions about the fundamental component of an operating system, which manages the allocation of resources to applications.

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Are these modern operating systems monolithic or microkernel?

I know that (at least at its conception) Linux and Mac OS were both monolithic kernels. My question is, what kind of kernels are Linux, Mac OS, and Windows today and why?
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Why do we need volume as an abstraction on top of partition?

I'm curious about what do we need volume as an abstraction on top of hardware partition? What problem it tries to solve? What is the limitation of this concept?
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User-level threads and information available to the kernel

User-level threads are transparent to the kernel. How is htop able to show user-level threads running on my system? I know that those threads are user-level threads ...
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313 views

Do user level threads take advantage of multi processing?

I asked this question here on stackoverflow, but maybe because of off-topic over there, it didn't received proper response. Does user level threads take advantage of multiprocessing ? I read one such ...
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local addresses in segmentation

I'm reading "Understanding Linux Kernel 3rd edition" and it starts talking about memory segments. It says that a logical address is: Included in the machine language instructions to specify the ...
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Calculation of speed up of a program executed in multi-threaded system

Speed up of execution of a program is to be calculated within a multi-threading rather than a single thread system. The program's 30% instruction can be executed serially & rest can be executed ...
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8 views

need for an example of synchronous but non periodic interrupt

I know that synchronous interrupts are interrupts that occur with a clock tick (after finishing an instruction) and I think that periodic if they happen in every n ticks of the clock. To get a better ...
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34 views

How can an unstable kernel write a memory dump?

I always wondered how a kernel that became unstable, e.g. due to a BSOD or a kernel panic, is able to do specific tasks. For example, if a Windows driver corrupts the stack of the kernel. It leads to ...
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33 views

interrupts in operating system

Normally user programs are prevented from handling I/O directly by I/O instructions in them. For CPUs having explicit I/O instructions, such I/O protection is ensured by having the I/O instruction ...
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Operating Systems - Why Stack Growths For a Fixed Parameter N Are Inconsistent?

I am taking an Operating Systems course and as a project, we are printing the content of the PCB of a process from task_struct of that process and its mm_struct & vm_area_struct pointers. During ...
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291 views

What are disadvantages of a Operating System that recognise file extensions ?

When Operating system recognise the file types It has several advantages like 1. avoid mistakes like trying to print a object file that produce garbage output but I can't think about disadvantages ...