i don't know the guts of fedora/rh... but i would imagine that a chunk of
the mem space is reserved for system operational functions. as a result, the
mem space that you, the app has, is the mem that's left over for apps to
play in..
the reserved mem space might be used for swap, mem checking, error checking,
os kernel functions, etc...
-----Original Message-----
From: fedora-list-bounces(a)redhat.com
[mailto:fedora-list-bounces@redhat.com]On Behalf Of Mike Chambers
Sent: Wednesday, October 01, 2008 9:33 AM
To: Community assistance, encouragement,and advice for using Fedora.
Subject: Re: Using all of 4GB RAM... questions and Vista versus Linux...
On Wed, 2008-10-01 at 11:17 -0500, Richard Shaw wrote:
Maybe someone can word this better than I but here it goes. The
memory
limit is not really tied to the OS "TYPE" (i.e. Windows XP/Vista,
Linux, etc) but more to the architecture (32-bit vs. 64-bit). As far
as I'm aware, all 32-bit OS's will have this limitation and all 64-bit
OS's will not. You can get Windows XP, Vista or Linux in both 32 and
64-bit flavors.
So to answer your question (c), yes, if you switch to a 64bit version
of Linux you will be able to use all 4GB.
Does that work on only 4Gb or more? I have 2Gb Ram, and running 64bit,
and still only see 1.8Gb of memory, as it did with 32bit as well.
--
Mike Chambers
Fedora Project - Ambassador, Bug Zapper, Tester, User, etc..
mikec302(a)fedoraproject.org
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