Date: Wed, 26 Apr 2000 10:07:08 -0700 From: Mike Smith <msmith@freebsd.org> To: Stephen Hocking <shocking@prth.pgs.com> Cc: msmith@freebsd.org, hackers@freebsd.org Subject: Re: Using the boot loader to set maximum memory size? Message-ID: <200004261707.KAA03050@mass.cdrom.com> In-Reply-To: Your message of "Wed, 26 Apr 2000 23:28:48 %2B0800." <200004261528.XAA12560@bloop.craftncomp.com>
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> Is there any chance of extending the loader so that it can set the memory > size, rather than hard coding it into the kernel config file? This would be > quite useful for testing things which like a large amount of memory set aside > exclusively for hardware's use (I'm thinking of Utah-GLX's DMA buffers for > G400 cards here). There are better ways to achieve that, but you can use: set hw.physmem=<value> MAXMEM (i386 only) Limits the amount of physical memory space available to the system to <value> bytes. <value> may have a k, M or G suffix to indicate kilobytes, megabytes and gigabytes respectively. Note that the current i386 architecture limits this value to 4GB. On systems where memory cannot be accurately probed, this option provides a hint as to the actual size of system memory (which will be tested before use). -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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