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Date:      4 Sep 2011 05:24:04 -0000
From:      "John Levine" <johnl@iecc.com>
To:        freebsd-questions@freebsd.org
Cc:        brett@lariat.net
Subject:   Re: Huge interrupt overhead reported after RAM added to Atom-based system
Message-ID:  <20110904052404.79122.qmail@joyce.lan>
In-Reply-To: <201109040512.XAA29689@lariat.net>

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>I'd like to experiment with having FreeBSD try to use less than the 
>full 4 GB (e.g., to make it act as if memory ended at, say, 3 GB) 
>but I'm not sure how to tell the kernel to do that.

In /boot/loader.conf set "hw.physmem" to whatever size you want it to use.

"man loader" for more info

R's,
John



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