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    SubjectRe: Using >1GB RAM
    Hello!

    In article <Pine.LNX.3.95.980113215041.23894A-100000@nightshade.z.ml.org> you write:
    >[...]

    >Any datapoints on how other X86 OSes handle this?

    OpenBSD doesn't map the whole real memory into its kernel virtual
    address space. The kernel virtual addresses range from

    /* KPTDI<<PDSHIFT */
    #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xf0000000)

    to

    /* APTDPTDI<<PDSHIFT */
    #define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xffc00000)

    making up for a maximum of 0xfc (252) megabytes of kernel virtual address
    space. Access to physical memory (for /dev/mem or paging) is done
    using temporary mappings.

    Regards, Felix.

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