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SubjectRe: large memory support for x86
BTW, this fork program did appear to kill about 2 sun servers here...
The linux kernel v2.2.16 that they were running survived fine.


On Thu, 12 Oct 2000, Richard B. Johnson wrote:

> On Thu, 12 Oct 2000, Oliver Xymoron wrote:
>
> > On Wed, 11 Oct 2000, Kiril Vidimce wrote:
> >
> > > My primary concern is whether a process can allocate more than 4 GB of
> > > memory, rather than just be able to use more than 4 GB of physical
> > > memory in the system.
> >
> > Define allocate. There are tricks you can play, but userspace is still a
> > flat 32-bit address space per-process.
> >
>
> --- per process. Which means, in principle, that one could have 100
> processes that are accessing a total of 400 Gb of virtual memory.
>
> It gets to be a bit less than that, though. Process virtual address
> space doesn't start at 0
>
> Script started on Thu Oct 12 13:25:45 2000
> cat xxx.c
> main()
> {
> printf("main() starts at %p\n", main);
> }
> # gcc -o xxx xxx.c
> # ./xxx
> main() starts at 0x8048488
> # exit
> exit
> Script done on Thu Oct 12 13:26:08 2000
>
>
>
> Cheers,
> Dick Johnson
>
> Penguin : Linux version 2.2.17 on an i686 machine (801.18 BogoMips).
>
> "Memory is like gasoline. You use it up when you are running. Of
> course you get it all back when you reboot..."; Actual explanation
> obtained from the Micro$oft help desk.
>
>
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