CONFIG_STRAM_SWAP: Support for ST-RAM as swap space

General informations

The Linux kernel configuration item CONFIG_STRAM_SWAP:

• prompt: Support for ST-RAM as swap space
• type: bool
• depends on: CONFIG_ATARI && CONFIG_BROKEN
• defined in arch/m68k/Kconfig
• found in Linux kernels: 2.5.45–2.5.75, 2.6.0–2.6.14

Help text

Some Atari 68k machines (including the 520STF and 1020STE) divide their addressable memory into ST and TT sections. The TT section (up to 512MB) is the main memory; the ST section (up to 4MB) is accessible to the built-in graphics board, runs slower, and is present mainly for backward compatibility with older machines.

This enables support for using (parts of) ST-RAM as swap space, instead of as normal system memory. This can first enhance system performance if you have lots of alternate RAM (compared to the size of ST-RAM), because executable code always will reside in faster memory. ST-RAM will remain as ultra-fast swap space. On the other hand, it allows much improved dynamic allocations of ST-RAM buffers for device driver modules (e.g. floppy, ACSI, SLM printer, DMA sound). The probability that such allocations at module load time fail is drastically reduced.

Hardware

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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