Re: How to visit physical memory above 4G?

[Rik van Riel]

On Thu, 2 Aug 2001, Terry Lambert wrote:

> Original poster said he was working on it for Linux, which
> means it's not done, which means "not Linux".

It's been running for a while now, integrated
in the 2.4 kernel.

The way Linux manages to avoid the horrors you
describe is by simply not letting the kernel
use more than its 1GB (or 2GB) of KVA. No special
tricks to make the kernel use more memory, let it
go on a diet instead.

> FWIW, on the "Linux has it, so FreeBSD should have it"
> arguments:
>
>       "If all your friends jumped off a cliff..."

Fully agreed, but as long as you don't do any
weird tricks trying to let the kernel itself use
more memory, it's not at all like jumping from a
cliff ...

Rik
--
Virtual memory is like a game you can't win;
However, without VM there's truly nothing to lose...

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