Date: Wed, 17 Feb 2010 15:59:49 -0800 From: Yuri <yuri@rawbw.com> To: Erik Trulsson <ertr1013@student.uu.se> Cc: Bill Moran <wmoran@potentialtech.com>, freebsd-questions@freebsd.org Subject: Re: Is it possible to see memory over 3GB on 32-bit FreeBSD? Message-ID: <4B7C82F5.7030207@rawbw.com> In-Reply-To: <20100217202327.GA23365@owl.midgard.homeip.net> References: <4B7C493B.1060503@rawbw.com> <20100217150217.393724ed.wmoran@potentialtech.com> <20100217202327.GA23365@owl.midgard.homeip.net>
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Erik Trulsson wrote: > It very much depends on what hardware you have in the system. Just > about every expansion card or I/O device will reserve some of the > address space for its own use. Some devices will need a lot of space - > a graphics card with 256MB of RAM on it will use (at least) 256MB of > the address space for example. > This doesn't seem like a good idea that video memory is always mapped to system memory. What if one day graphics card gets 4GB RAM? Then we won't even be able to have 32-bit OS working with such card and in 64-bit OS 4GB of memory would be grossly wasted. Yuri
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