Understanding the Linux Kernel

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18.4. Anticipating Linux 2.4

Static arrays used to represent semaphores and messages have been removed and replaced by dynamic data structures. Larger IPC messages can now be handled.

IPC shared memory regions are implemented in a different way: a new /proc filesystem, denoted as sysvipc, has been introduced. It currently includes only one directory called shm containing a virtual file for each IPC shared memory region.

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