Re: How to use memory over 4GB

[Roberto Fichera <kernel@tekno-soft.it>]

At 14.55 16/05/2005, li nux wrote:

>I guess u r on 32-bit platform.
>Then, u need to enable PAE ( if not enabled alredy)
>and rebuild the kernel.
>This will be transparent to the user space.
>Ur word size will still be 32-bit, only thing is PAE
>will change the way u translate the address by adding
>one more level of indexing to the page table.

Yes! It's already PAE enabled.


>-lnxluv.
>
>--- Roberto Fichera <kernel@tekno-soft.it> wrote:
> > Hi All,
> >
> > I've a dual Xeon 3.2GHz HT with 8GB of memory
> > running kernel 2.6.11.
> > I whould like to know the way how to use all the
> > memory in a single
> > process, the application is a big simulation which
> > needs big memory chuncks.
> > I have readed about hugetlbfs, shmfs and tmpfs, but
> > don't understand how I
> > can access
> > the whole memory. Ok! I can create a big file on
> > tmpfs using shm_open() and
> > than map it by using mmap() or mmap2() but how can I
> > access over 4GB using
> > standard pointers (if I had to use it)?
> >
> > So, please send me some url, documents etc and/or
> > piece
> > of source code that shows how to do it in user
> > space.
> >
> > Thanks _very much_ in advance,
> >
> > Roberto Fichera.
> >
> > -
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>
>
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Roberto Fichera.