CONFIG_RISCV_EFFICIENT_UNALIGNED_ACCESS: Assume the system supports fast unaligned memory accesses

General informations

The Linux kernel configuration item CONFIG_RISCV_EFFICIENT_UNALIGNED_ACCESS has multiple definitions:

Assume the system supports fast unaligned memory accesses found in arch/riscv/Kconfig

The configuration item CONFIG_RISCV_EFFICIENT_UNALIGNED_ACCESS:

• prompt: Assume the system supports fast unaligned memory accesses
• type: bool
• depends on: CONFIG_NONPORTABLE
• defined in arch/riscv/Kconfig
• found in Linux kernels: 6.9–6.17, 6.18-rc+HEAD

Help text

Assume that the system supports fast unaligned memory accesses. When enabled, this option improves the performance of the kernel on such systems. However, the kernel and userspace programs will run much more slowly, or will not be able to run at all, on systems that do not support efficient unaligned memory accesses.

Assume the CPU supports fast unaligned memory accesses found in arch/riscv/Kconfig

The configuration item CONFIG_RISCV_EFFICIENT_UNALIGNED_ACCESS:

• prompt: Assume the CPU supports fast unaligned memory accesses
• type: bool
• depends on: CONFIG_NONPORTABLE
• defined in arch/riscv/Kconfig
• found in Linux kernels: 6.8

Help text

Say Y here if you want the kernel to assume that the CPU supports efficient unaligned memory accesses. When enabled, this option improves the performance of the kernel on such CPUs. However, the kernel will run much more slowly, or will not be able to run at all, on CPUs that do not support efficient unaligned memory accesses.

If unsure what to do here, say N.

Hardware

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Sources

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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