Re: [gentoo-user] 2GB of RAM

[David Klempner <klempner@imsanet.org>]

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* Vladimir G. Ivanovic <vgivanovic@comcast.net> [2006-06-20 16:51]:
> I figured it out. The VMSPLIT options are *not* available on 64-bit
> systems. (Phew. It's neither encroaching madness nor Alzheimer's.)

Yeah... I suppose I wasn't paying close enough attention to what you
were saying. :-)

The VMSPLIT options are about how the kernel uses the 32 bit address
space (specifically, what fraction of the address space of each process
it reserves for its own use). A large portion of what a 64 bit system
gets you is more than 32 bits worth of address space, so I'm fairly sure
the entire issue is moot. :-)

(On the other hand, I have still yet to look really closely at the gory
details of how AMD64 works, and how linux uses it. I had a decent idea,
way back when the only implementations available were simulators, but
that was a while ago and I've forgotten a lot of it. As such, I might be
wrong.)

-- 
David Klempner

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