Re: How to use memory over 4GB

[li nux]

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.

-lnxluv.

--- Roberto Fichera <kernel@xxxxxxxxxxxxx> 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. 
> 
> -
> To unsubscribe from this list: send the line
> "unsubscribe linux-kernel" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at 
> http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
> 


		
__________________________________ 
Yahoo! Mail Mobile 
Take Yahoo! Mail with you! Check email on your mobile phone. 
http://mobile.yahoo.com/learn/mail 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/