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Re: 12GB RAM with DfBSD?

From: "Thomas E. Spanjaard" <tgen@xxxxxxxxxxxxx>
Date: Wed, 07 Sep 2005 13:47:01 +0200

Filip Wuytack wrote:
Emiel Kollof wrote:
On Wednesday 07 September 2005 11:22, Filip Wuytack wrote:
But I was wondering before I start playing around if DF can address the full 12GB at all in it's current state?
AFAICR, DragonFly doesn't do PAE, so more than 4 GB won't be addressable. I don't know of any plans to implement PAE though. It's kind of a bitch to do for IA32. It also doesn't do 64-bit long mode yet, but if we did, 12GB would be perfectly okay :)
Do know when DragonFly would support 64-bit? Can DF easily be ported to AMD64 (have any of the changes the DF team to their 4.x FBSD kernel made this step more trivial) or does it come down to a full rewrite of DF for 64bit?

As Matthew Dillon is getting more AMD64 machines, chances are he and Hiten Pandya will commence porting soon. There are obviously enough valid references to look at (FreeBSD/amd64, NetBSD/amd64), and a lot can be adapted from the i386 code, as the architectures aren't that much of a difference. It's going to be easier than porting to macppc, to say the least.

Also, PAE won't be implemented due to it not being worth the effort when compared to 64bit architectures. Even the PAE homestay, the Xeon, has turned to a 64bit addressing- and datapath.

		-- Thomas E. Spanjaard

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