[okl4-developer] Address space concept

[aparna]

Hello,

The pd_create() function provided by Iguana is used to create a new
protection domain. A look at the code shows this function in turn calls
do_space_setup() in which new space is allocated. 
I am confused why do we need to allocate new space when creating protection
domains? I thought all protection domains reside in Iguana Address Space
which is a single address space? A search pointed me to the mail
http://lists.okl4.org/pipermail/developer/2007-November/000475.html which
says "... each Iguana protection domain is implemented by an underlying L4
address space." I fail to understand how iguana address space relates to L4
address space.

Many thanks for your help.
Aparna
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