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VM limits on AMD64


Hello,

I have a few very simple questions:

1.) The current VM userspace limit for 2.4.x kernels on AMD64 systems in
64bit long mode is 512 G. What is the limit in the current 2.5.x kernels?

2.) If it is still 512G, will that change until 2.6 comes out?

3.) What is the exact usage of the rest (i.e. 16 Exabyte minus 512 Gig)? I
know of something like a split kernel mapping/direct mapping. What is
exactly is meant by that?

4.) Is the kernel VM permanently mapped as in IA32?


Many thanks and best regards

Oliver


		   Dr. Oliver Tennert

  		   +49 -7071 -9457-598

 		   e-mail: O.Tennert@science-computing.de
  		   science + computing AG
  		   Hagellocher Weg 71
   		   D-72070 Tuebingen


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