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From: koehler@eisner.nospam.encompasserve.org (Bob Koehler)
Newsgroups: comp.sys.dec,comp.os.vms
Subject: Re: RB730 Integrated Disk Controller (R80/RL02) usable with VAX-11/750?
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Date: 3 May 2011 12:36:03 -0500
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In article <ipp7s2$tig$1@Iltempo.Update.UU.SE>, Johnny Billquist <bqt@softjar.se> writes:
> 
> Not entirely true. Most the kernel needs to be in physical memory (even 
> if it is in virtual address space). It's just user processes that use 
> demand paging. (Virtual memory itself only means you are remapping one 
> set of addresses to another set, it does not reduce the memory 
> requirements at all, that's what the demand paging does for you.)

   Some of the kernel needs to be in RAM.  Although it's not
   particularly great for performance, you can tune VMS to get non-0
   kernel page faults for the rest.  And not all of the VMS executive
   is in the kernel.