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Re: How do I learn the Hurd stuff?

From: Almudena Garcia
Subject: Re: How do I learn the Hurd stuff?
Date: Thu, 30 Aug 2018 20:12:07 +0200

Yes, I know. But the processor scheduler is implemented yet in GNU Mach code. Also the Memory Management Unit.
Both components are duplicated its codes to run with a single processor and multiprocessor. May can be needed to do code fixes to repair any error, but these components exist.

Also, there is another problem with drivers, what aren't thread-safe. Then, we have to isolate these process to avoid concurrency problems

El jue., 30 ago. 2018 a las 19:54, Adam Van Ymeren (<adam@vany.ca>) escribió:

Enabling multicore support in the processor is only a small part of the problem.  The OS is still in charge of deciding how to utilize those multiple cores to run all its threads and processes.


From: Almudena Garcia
Sent: Thursday, August 30, 2018 1:36 PM
To: Richard Braun; bug-hurd@gnu.org; Joshua Branson
Subject: Re: How do I learn the Hurd stuff?


But... Why we can't implement this via hardware? Configuring multiprocessor in the CPU.
I don't know what is the problem to do this.


Also, this multiprocessor support can be optional, allowing the user to enable or disable It.






El jue., 30 ago. 2018 a las 19:01, Samuel Thibault (<samuel.thibault@gnu.org>) escribió:


Almudena Garcia, le jeu. 30 août 2018 18:58:19 +0200, a ecrit:
> Instead, It feels to use a strange implementation to do
> multithreading (not real multiprocessor) via software.

It's not "strange", it's what all OSes do. Even with multiple
processors, OSes do that, to schedule threads on the available
processors via software.



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