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Re: Why "high memory" in x86?


What am I missing?

Thanks,

Rajat


Sorry & thanks every one ... I missed out that the kernel is actually
executing on the behalf of a user process only, and is hence sharing
its virtual address space with a user process all the time. My doubts
are clarified.

However, what is meant when we that the 1 GB of physical memory is
"identity mapped" to 1 GB kernel virtual address space? I think it
means that all the user processes have have the 3GB->4GB virtual
addresses mapped to the kernel code & data. Is this right?

Thanks,

Rajat

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