Date: Thu, 14 Sep 2006 13:54:09 -0400 From: Martin Cracauer <cracauer@cons.org> To: RJ45 <rj45@slacknet.com> Cc: freebsd-questions@freebsd.org Subject: Re: memory problem Message-ID: <20060914175409.GB16873@cons.org> In-Reply-To: <Pine.LNX.4.61.0609140220420.18820@slacknet.com> References: <Pine.LNX.4.61.0609140220420.18820@slacknet.com>
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RJ45 wrote on Thu, Sep 14, 2006 at 02:24:43AM -0600: > > > Hello, > I am running FreeBSD 6.1-RELEASE-p6 build with buildworld. > > THe system has exactly 4GB of memory but the memory is not complitely > seen by the system. > > At boot thime I Get this warning > > 524288Kb of memory above 4GB ignored > > and then if I check > > real memory = 3757965312 (3583 MB) > avail memory = 3678597120 (3508 MB) You need to enable remapping in the BIOS. The memory between 3-4 GB is partly taken by device space. So you have to re-map that actual RAM there to a position above 4 GB - which is what the BIOS does. Once the memory is above 4 GB you need a 64 bit kernel or a 32 bit kernel with PAE enabled to use it. Works fine for me on several machines, BTW. But the remapping options in the BIOSes are often broken. Martin -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Martin Cracauer <cracauer@cons.org> http://www.cons.org/cracauer/ FreeBSD - where you want to go, today. http://www.freebsd.org/
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