Solaris Zones & IBM Mainframe LPARs on Large Systems, Solaris With Linux & MxN Thread - IT Assignment Help

Assignment Task

Question 1 
Solaris and Linux have recently moved from an MxN thread model to a 1-1 thread model. Why? What are the advantages and disadvantages of each model? 

Question 2 
Some operating systems can run other operating systems as guests or as "virtual machines". Examples include Solaris Zones and IBM mainframe LPARs on large systems,  and VMware, WINE, and Windows on smaller systems. How is this accomplished? How do the virtual environment map memory, interrupts, processes, etc to those on the host OS? 

Question 3 
a. Give a solution to the dining philosophers’ problem using semaphores b. Give a solution to readers' and writers' problems using semaphores.
 

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