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Date:      26 Jan 2003 21:54:59 -0500
From:      Eric Jones <fpicard@bellsouth.net>
To:        Terry Lambert <tlambert2@mindspring.com>
Cc:        walt <wa1ter@hotmail.com>, freebsd-current@freebsd.org
Subject:   Re: Options MAXMEM added to GENERIC kernel config causes kernel panicin  -current
Message-ID:  <1043636098.15573.17.camel@griffin.webcoven.org>
In-Reply-To: <3E34917A.E8C421E5@mindspring.com>
References:  <b11r73$19r1$1@FreeBSD.csie.NCTU.edu.tw> <3E34787F.7020201@hotmail.com>  <3E34917A.E8C421E5@mindspring.com>

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On Sun, 2003-01-26 at 20:55, Terry Lambert wrote:
> walt wrote:
> > Steve Kargl wrote:
> > > On Sun, Jan 26, 2003 at 05:08:40PM -0500, Eric Jones wrote:
> > >>Is there any reason, on newer motherboards, to need the MAXMEM option?
> > >
> > > I don't know.  I've always used MAXMEM.  Guess it's
> > > time to remove it from my kernel config file.
> > 
> > FWIW, I've been using FBSD -stable and -current for about 3 years
> > on five different machines and I've never used MAXMEM.  Never had
> > any problems recognizing memory, either -- guess I've been luckier
> > than some.
> 
> MAXMEM is useful for testing configurations with less memory,
> without having to open up your box and yank SIMMs, or to have
> a bunch of different sized pairs of SIMMs lying around.
> 
> -- Terry
> 

For uses such as testing I can understand, but I don't see a use under
normal conditions, at least on newer systems.  I haven't dug into the
source yet today, but there must be a reason why ACPI doesn't play nice
on certain systems when MAXMEM is specified.  

I wonder if it is just AMD systems?  Mine's a 900MHz Duron, and IIRC I
think someone else in earlier in the thread was using an AMD also.

-- 
Eric Jones <fpicard@bellsouth.net>


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