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CONFIG_ARM64_USE_LSE_ATOMICS: Atomic instructions

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The Linux kernel configuration item CONFIG_ARM64_USE_LSE_ATOMICS:

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As part of the Large System Extensions, ARMv8.1 introduces new atomic instructions that are designed specifically to scale in very large systems.

Say Y here to make use of these instructions for the in-kernel atomic routines. This incurs a small overhead on CPUs that do not support these instructions and requires the kernel to be built with binutils >= 2.25 in order for the new instructions to be used.



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