On Sat, Apr 5, 2008 at 13:48:47 +0000 (+0000), Andy Smith wrote:
> Hi Rob,
>
> On Sat, Apr 05, 2008 at 02:31:35PM +0100, Rob Malpass wrote:
> > Two related questions:
> > 1) I want to build a machine with a lot of RAM for virtualisation (I want
> > to run a handful of servers on one physical box) purposes - probably 8Gb -
> > the maximum the board supports. However I'm told I can't get at all of
> > this RAM unless I run in 64 bit mode. Is this true?
>
> Yes and no. Not in a single process. A PAE kernel will let you
> address up to 64G but each process only being able to address
> 3.mumbleG.
I know there is a 4+4 kernel now which lets both userspace and kernel
space use the full 4GB (at a small cost penalty). I'm not sure if
it's for PAE too.
http://lwn.net/Articles/74295/
Adrian
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