Re: Process not given >890MB on a 4MB machine ?????????

[afei@jhu.edu]

The current Linux MM design is a 3:1 split of 4G virtual/physical memory.
So a process, under normal condition cannot get beyond 3G memory
allocated.

On Tue, 25 Sep 2001, Stephen C. Tweedie wrote:

> Hi,
>
> On Mon, Sep 24, 2001 at 09:16:58PM +0000, Joseph A Knapka wrote:
>
> > No. You still only get a maximum of 4GB of -virtual- space per
> > process. The machine can address up to 64GB of -physical- RAM,
> > but a single process (actually a single page directory) can
> > see only 4GB at a time. Sorry :-(
>
> There are hacks to work around this --- for example, you can set up
> large amounts of shared memory and map that on demand when you are
> looking up your dataset.  However, it's simply not possible for user
> space to refer to more than 3GB at once on Linux/Intel.  You *must* go
> to a 64-bit architecture if you want more than that.
>
> Cheers,
>  Stephen
>
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@kvack.org.  For more info on Linux MM,
> see: http://www.linux-mm.org/
>

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/