On Fri, 05 Sep 2003 19:19:40 +0200, Helge Preuss <spam.preuss@fhi-berlin.mpg.de> wrote:
>
>> nbd:/usr/oboe/ptb% grep -i memory /usr/local/src/linux-2.4.20-xfs/Documentation/Configure.help
>> marketed by the Digital Equipment Corporation of blessed memory, now
> Nice one :-)
>> Linux can use up to 64 Gigabytes of physical memory on x86 systems.
>> physical memory, not all of it can be "permanently mapped" by the
>> kernel. The physical memory that's not permanently mapped is called
>> "high memory".
>> split: 3GB are mapped so that each process sees a 3GB virtual memory
>> space and the remaining part of the 4GB virtual memory space is used
>> by the kernel to permanently map as much physical memory as
>> The actual amount of total physical memory will either be auto
> Found that already. To ask you the same question as I asked David: can
> you confirm it really works for you? I.e., did you ever successfully
> allocate >2 GB in one process? The docs are ambiguous on that topic.

IIRC, support for >4GB is only for the total system.
You'll never address more than 4GB on a processor with 32 bit addressing
such as the intel x86 familly. Less (like 2GB) if the high address bit
is attached meaning like "system vs. user".