do I need to do something special to use more than 4 Gigs under Feisty?

[john]

Hi Simon,

I am pretty sure that there are kernel patches that allow 32 bit linux
to address more than 4 gigs of memory (see for ex:
http://lwn.net/Articles/75174/ ). Flash and such pretty much need to
work for this project to be a success, since I'll be replacing fat
clients where flash does work.

Thanks for your ideas, keep 'em coming, and don't hesitate to correct
me if I am off-base!

John

On 5/30/07, Simón Ruiz <simon.a.ruiz at gmail.com> wrote:
> The way I understand it, 32 bit kernels have 4 GB of addressable
> memory, but they need to set aside some of that to be able to use
> things like PCI slots and such, so you're not actually going to HAVE 4
> Gigs of RAM available.
>
> If you want to use your full 8 Gigs, you'll need to use the 64-bit
> kernel. On the server, you're not likely to see any of the downsides
> of using 64-bit (like getting Flash and media codecs and such to
> work).
>
> OTOH if you already knew that and DID use the 64-bit kernel, I'm flat
> out of ideas.
>
> HTH,
>
> Simón
>
> On 5/30/07, john <lists.john at gmail.com> wrote:
> > Hi all,
> >
> > I just installed Edubuntu 7.04 on Server running a dual opteron, dual
> > core setup. The mobo is a Tyan S3992G3NR. The kernel is setup as SMP
> > and all cores are recognized. My problem is that only 3 Gigs of memory
> > is recognized. That seems odd to me, as I would expect problems (if
> > they occurred) to start at 4G. Does anyone know if there is something
> > special one has to do to enable large memory support for Ubuntu
> > Feisty?
> >
> > The bios and MemTest86 both correctly recognize 8 Gigs.
> >
> > Any ideas would be appreciated!
> >
> > Thanks,
> >
> > John
> >
> > --
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> >
>
>
> --
> -Simón A. Ruiz
>