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The book is available and called simply "Understanding The Linux Virtual Memory Manager". There is a lot of additional material in the book that is not available here, including details on later 2.4 kernels, introductions to 2.6, a whole new chapter on the shared memory filesystem, coverage of TLB management, a lot more code commentary, countless other additions and clarifications and a CD with lots of cool stuff on it. This material (although now dated and lacking in comparison to the book) will remain available although I obviously encourge you to buy the book from your favourite book store :-) . As the book is under the Bruce Perens Open Book Series, it will be available 90 days after appearing on the book shelves which means it is not available right now. When it is available, it will be downloadable from http://www.phptr.com/perens so check there for more information.
To be fully clear, this webpage is not the actual book.
Next: 5.3 Process Address Space Up: 5. Process Address Space Previous: 5.1 Linear Address Space   Contents   Index
Each address space consists of a number of page-aligned regions of memory
that are in use. They never overlap and represent a set of addresses
which contain pages that are related to each other in terms of protection
and purpose. These regions are represented by a
vm_area_struct and are roughly analogous to the
vm_map_entry struct in BSD. For clarity, a region may
represent the process heap for use with
malloc(), a memory mapped
file such as a shared library or a block of anonymous memory allocated with
mmap(). The pages for this region may still have to be allocated,
be active and resident or have been paged out.
If a region is backed by a file, its
vm_file field will be set. By traversing
address_space for the region may be
address_space has all the filesystem specific
information required to perform page-based operations on disk.
A number of system calls are provided which affect the address space and regions. These are listed in Table 5.1
Next: 5.3 Process Address Space Up: 5. Process Address Space Previous: 5.1 Linear Address Space   Contents   Index Mel 2004-02-15
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