CONFIG_FT_FDC_THR: Default FIFO threshold (EXPERIMENTAL)

General informations

The Linux kernel configuration item CONFIG_FT_FDC_THR:

• prompt: Default FIFO threshold (EXPERIMENTAL)
• type: int
• depends on: CONFIG_FTAPE && CONFIG_EXPERIMENTAL
• defined in drivers/char/ftape/Kconfig
• found in Linux kernels: 2.5.45–2.5.75, 2.6.0–2.6.19

Help text

Set the FIFO threshold of the FDC. If this is higher the DMA controller may serve the FDC after a higher latency time. If this is lower, fewer DMA transfers occur leading to less bus contention. You may try to tune this if ftape annoys you with "reduced data rate because of excessive overrun errors" messages. However, this doesn't seem to have too much effect.

If unsure, don't touch the initial value, i.e. leave it at "8".

Hardware

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This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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