On Thu, May 27, 2010 at 11:01:58AM +0100, Peter Kay (Syllopsium) wrote:
> >From: "Siju George" <sgeorge...@gmail.com>
> >On Thu, May 27, 2010 at 3:22 PM, Peter Kay (Syllopsium)
> ><syllops...@syllopsium.com> wrote:
> >>
> >>>From: "Siju George" <sgeorge...@gmail.com>
> >>>but OpenBSD 4.7/amd64 SMP detects only 3 GB.
> >>>
> >>>Is there anything more I should do to get the other 1 GB of RAM
> >>>recognized by the System?
> >>>
> >>This is normal. Large memory support is not yet included in
> >>OpenBSD by default for amd64.
> >>
> >
> >Is there anything I can do to get this by recompiling the kernel
> >or something?
> Yes and no; google for 'bigmem' in the misc list for marc.info. You
> have to edit
> a source file and recompile the kernel.
>
> However, it won't work (to be precise, it will probably crash on
> boot, or possibly
> afterwards) unless you have an IOMMU, and most Intel systems don't.
Correct, it isn't recommended.
>
> OpenBSD doesn't support the AGP/PCI-e GART as an IOMMU,
Incorrect, that is all we support on amd64 right now.
there are a few machines where it mystically does not work, though. That
is amd only, though.
>and I'm not sure
> if it supports VT-d platforms (which you probably aren't running
> anyway).
Being worked on, needs some changes that hopefully will be done at
c2k10, we definitely have access to a machine with the intel VT stuff,
the amd64 new shiny iommu i'm not sure if we have hardware yet.
Similarly turning bigmem back on is one of my main goals.
>The only option here is AMD.
>
> Until the devs tell us it's working, it's not worth persevering with.
That is the best approach for now.
-0-
--
Stupid, adj.:
Losing $25 on the game and $25 on the instant replay.
