Messages in this thread | | | Subject | Linux and lots of memory: documentation? | Date | Thu, 17 Dec 1998 11:56:01 -0500 | From | Lars Kellogg-Stedman <> |
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Howdy,
I'm trying to track down information regard how Linux handles memory. I've got a 4GB system, and the stock 2.1.131 kernel only uses about 970M of that memory. I'd like Linux to be able to access as much of that physical memory as possible.
I've been able to find very little information regarding this topic, other than the comments in include/asm-i386/page.h. I was hoping you could point me towards a resource that might answer the following questions:
(1) How is __PAGE_OFFSET actually used? The page.h comments aren't clear on this. They suggest *how* to change the value, but not *why*.
(2) Is it possible, under Linux, to access 4GB of physical of memory? Or is some of that address space always required for memory mapped i/o?
(3) Is it possible to make this process more modular? That is, is there any way to make Linux happily support whatever memory happens to be available?
Thanks for your help,
-- Lars
-- Lars Kellogg-Stedman * lars@bu.edu * (617)353-5228 Department of Computer Science, Boston University
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