hi, all
One line I often read is each process is given a unique 32-bit or 64-bit
flat address space, known as process address space.
So it sounds like a process have the whole space to itself and read or
write as it wants, but it is not entirely true since before it can read
or write, it must ask kernel for it, to get a so-called memory area
(represented by vm_area_struct), is this understanding correct?
Another related question is when people talks about 1G/3G split, 1G is
for kernel, 3G is for process, are they referring to the same process
address space?
For each process's address space, in addition to its own code, data,
shared library code and data etc. are there any kernel code in it? that
doesn't make much sense.
Hope someone can help me to clarify the thoughts.
thanks
ruby
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