On Thursday 12 July 2012 05:32:21 Jeff King wrote:

> [...] which means you are probably not even getting to use all 4Gb of your
> address space (my impression is that without special flags, 32-bit Windows
> processes are limited to 2Gb of address space).

Indeed, that's how windows partitions memory on 32-Bit Systems. See:


As it's always with that strange company, they don't spend a word about how 
they do it in the emulated 32 bit environment. However, a short testing 
reveals that a 32 bit process running on 64 bit Windows 7 with 6 GiB memory is 
not able to malloc() more than 1 GiB at once (which is not a big suprise at 
all - as malloc'ed memory has to be continuous inside the address space).

So one might guess that there is no difference in memory partitioning for 32 
bit processes running on 64 bit OS.


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