81,9 → 81,10 |
<para>Userspace tasks depend on support of address spaces provided by the |
kernel. Each address space is a set of mutually dijunctive address space |
areas that group pages of common attributes. An address space area is |
usually connected to, and backed by, an anonymous memory or an executable |
image of some program. Anonymous memory address space areas can be easily |
shared among address spaces.</para> |
usually connected to, and backed by, anonymous memory, executable image of |
some program or continuous region of physical memory. However, swapping |
pages in and out to external memory is not supported. Address space areas |
can be easily shared among address spaces.</para> |
</section> |
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<section> |