Implementing file reading in C/Python

[Grant Edwards]

On 2009-01-13, Steve Holden <steve at holdenweb.com> wrote:
> sturlamolden wrote:
>> On Jan 12, 1:52 pm, Sion Arrowsmith <si... at chiark.greenend.org.uk>
>> wrote:
>> 
>>> And today's moral is: try it before posting. Yeah, I can map a 2GB
>>> file no problem, complete with associated 2GB+ allocated VM. The
>>> addressing is clearly not working how I was expecting it too.
>> 
>> The virtual memory space of a 32 bit process is 4 GB.
>> 
> I believe, though, that in some environments 2GB of that is mapped onto
> the operating system, to allow system calls to access OS memory
> structures without any VM remapping being required

IIRC, in Linux the default for the past several years has been
3GB user, 1GB kernel.  But, there are kernel configuration
options to enable different configurations.

> getting-sicker-of-vista-by-the-minute-ly yr's  - steve

Haven't had to touch Vista yet -- I'm annoyed enough by XP.

-- 
Grant