Question

What do you mean by u-area (user area) or u-block?

Answer 1

This contains the private data that is manipulated only by 
the Kernel. This is local to the Process, i.e. each process 
is allocated a u-area(user area).


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Answer 2

This contains the private data that is manipulated only by the kernel. This is local to the process, i.e. each process is allocated a u -area.