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    SubjectRe: [Lse-tech] Re: maximum possible memory limit ..
    Andi Kleen wrote:
    > > Linux supports up to 4 GB (~2^32 bytes) of memory on 32-bit
    > > architectures and 64 GB (~2^36 bytes) on x86 with PAE. No other
    > That's far too optimistic. 64GB will need patches, like the pgcl
    > patch. It is unlikely to work out of the box. Just do the math.

    [explanatory math snipped]

    > Realistic limit currently is ~16GB with an IA32 box. For more you need

    This means ~16GB is available on IA32 right now with vanilla kernels,
    and 64GB is available from vendors who are willing to apply the pgcl
    patch. Conclusion: Linux supports 64GB on IA32

    > an 64bit architecture.

    > > On 64-bit systems, Linux supports up to 16 EB (~2^64 bytes) of memory

    That statement is OK?


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