On 16 May 2005, Roberto Fichera whispered secretively:
> At 16.17 16/05/2005, Eric Dumazet wrote:
>>If your process is cpu bounded (and not issuing too many system calls),
>> then 4GB/4GB split let it address more ram, reducing the need to shift windows in
>>mmaped files for example.
>
> ... any source code that explain better what you say ;-)!
<http://lkml.org/lkml/2003/7/8/246> perhaps?
(In a nutshell: it gives processes an extra 1Gb of virtual memory, at
the cost of making system calls --- and everything else that must
transition to kernel space --- *much* slower.)
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