Re: [PATCH] proposed addition of Documentation/bigmem.txt

Rogier Wolff (
Sun, 17 May 1998 08:00:32 -0400 (EDT)

On Sun, 17 May 1998, Myrdraal wrote:

> On Sun, May 17, 1998 at 08:13:15AM -0400, Peeter Joot wrote:
> Hi,
> > > Every so often, the question of how to run Linux on a machine with alot
> > > of memory (>900mb or so) comes up. Wouldn't it be nice if you could point
> > > them to a file in Documentation/? If this patch makes it into the kernel,
> > > you will be able to. Feedback? (Note, my email
> > > seems to be non-functional. So don't mail me there.)
> > As one of those people, I have some extra questions about this.
> >
> > Why is it that the default isn't to support (say) 2Gb by default?
> Hmm, I'm not sure, and I didn't save the old threads on this subject.
> > Are there some sort of disadvantages to machines with small
> > memories that make this undesirable?
> I would assume so. Perhaps it means that the machine can't have as much
> swap space. Does anyone who knows more about this want to speak up? :)
> -Myrdraal

There is a trade off between maximum physical memory and maximum virtual
memory (i.e. size per process and amount of swap.).

So with the default settings you have a max of 1gig physical with 3gigs
virtual. Setting the max to 3gigs would only allow 1gig virtual, so you'd
need multiple processes to actually use all that ram..

If you can afford 1gig+ ram? Why not use Alpha?

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