Date: Thu, 27 Sep 2007 09:48:40 -0500 From: Paul Schmehl <pauls@utdallas.edu> To: freebsd-questions@freebsd.org Subject: Re: Dual Opterons don't see all memory Message-ID: <5737E46D4EF6BA67336CF5DA@utd59514.utdallas.edu> In-Reply-To: <46FB4139.8020104@infracaninophile.co.uk> References: <DF52D4C2-523B-48E4-957A-01FB81C80FC3@CS.UCLA.EDU> <46FB2A26.8040507@pacific.net.sg> <74CB72FB-0B36-4945-B121-E61E07BAA4F5@CS.UCLA.EDU> <26F3B5E1A6FC015BDA8980FB@paul-schmehls-powerbook59.local> <46FB32B3.10800@pacific.net.sg> <46FB4139.8020104@infracaninophile.co.uk>
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--==========B8C2946E8B50B1C3E984========== Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: quoted-printable Content-Disposition: inline --On Thursday, September 27, 2007 06:35:53 +0100 Matthew Seaman=20 <m.seaman@infracaninophile.co.uk> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Erich Dollansky wrote: > >> Paul Schmehl wrote: >>> --On September 26, 2007 9:06:57 PM -0700 Eric Osterweil >>> <eoster@CS.UCLA.EDU> wrote: >>> >>>> On Sep 26, 2007, at 8:57 PM, Erich Dollansky wrote: >>>> >>>>> Eric Osterweil wrote: >>>>> >>>>>> make use of it's 6GB of memory, and FreeBSD can only see about 4GB >>>>>> of it. >>>>>> Can anyone help me figure out how to make use of the missing GB? >>>>>> FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 UTC 2007 >>>>> >>>>> this looks like a 32 bit binary to me. >>>>> >>>>> You either need a 64 bit binary or you need to enable PAE. >>>>> >>>>> Just build a custom kernel for 64 bits. >>>>> >>>> >>>> Ahh... To do this, do I just specify the CPUTYPE in the /etc/make.conf >>>> as: >>>> CPUTYPE=3Damd64 >>>> ? >>>> >>> No. Add options SMP to GENERIC or use the SMP conf file that's >>> already there (and includes GENERIC). Then recompile the kernel per >>> the handbook. >>> >> he still has to set the CPU type also in this config file to amd64. > > If the OP has installed FreeBSD i386 then changing the CPU type in > /etc/make.conf won't magically get him FreeBSD amd64 --- it will just > get him FreeBSD i386 optimized for AMD processors running in 32bit > mode. > > As far as I know, there is no simple way to start with a 32-bit > system and the FreeBSD sources and recompile and reinstall everything > into a 64-bit system. (Although the opposite direction is apparently > possible on 7-CURRENT, but it's a guru-only level of difficulty.) > > The best and most effective answer here is to start by downloading > an amd64 installation CD and redo the whole thing from scratch. > Thanks, Matthew. Guess I should stop assuming that the OP used the right=20 distro to begin with.... --=20 Paul Schmehl (pauls@utdallas.edu) Senior Information Security Analyst The University of Texas at Dallas http://www.utdallas.edu/ir/security/ --==========B8C2946E8B50B1C3E984==========--
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