Re: Kernel vs user memory

sidc7
2009-01-17T06:42:42Z

One last question, which one of the two lowmem or highmem kernel is most
commonly used on contemporary linux boxes. I am guessing highmem kernel ?

Thanks for the quick replies, helped a lot

H. Peter Anvin wrote:
>
> sidc7 wrote:
>> If I am not mistaken, Linux kernel is a high memory kernel, hence for
>> Linux
>> kernel, nothing will be mapped to the kernel space, other than the memory
>> beyond 896MB which is the kernel's virtual address space. Am I right on
>> this?
>
> It's a compilation option, and depends on the architecture. What you
> described is true for an i386 kernel compiled as a highmem kernel. On
> the other hand, a 64 bit kernel is *never* highmem.
>
> -hpa
>
> --
> H. Peter Anvin, Intel Open Source Technology Center
> I work for Intel. I don't speak on their behalf.
>
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