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CONFIG_MAX_PHYSMEM_BITS: Maximum size of supported physical memory in bits (42-53)

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The Linux kernel configuration item CONFIG_MAX_PHYSMEM_BITS:

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This option specifies the maximum supported size of physical memory in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB). Increasing the number of bits also increases the kernel image size. By default 46 bits (64TB) are supported.



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