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Crossing the user-kernel boundary is not a trivial task. Many mechanisms exist for this communication, and each one has specific advantages and disadvantages, depending on the environment and bandwidth requirements. Security is a constant concern to prevent inadvertently allowing one program to access data or files from another program or user. It is every kernel programmer’s personal responsibility to take security into account any time that data crosses the user-kernel boundary.
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Last updated: 2006-11-07
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