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User pages accounting

1 byte removed, 13:57, 4 September 2006
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Use * in Terms
=== Terms ===
The following terms are used by UBC
# * ''shmem mapping'' — a mapping of file belonging to <code>tmpfs</code>. UBC accounts these pages separately and the description below doesn't take such pages into account;# * ''private mapping'' — this includes the following types of mappings:## ** writable anonymous mappings## ** writable private file mappings#: Both types are not backed by disk file and thus may not be just freed. These mappings are charged with possible reject right when they are made — in <code>sys_mmap()</code>/<code>sys_brk()</code>.# * ''unused pages'' — this is the number of pages which belong to private mapping, but are not yet touched.
=== Math model ===