Re: Improved file handling mechanisms for 64-bit architectures

[Valdis . Kletnieks]

On Sun, 08 Feb 2004 19:37:45 +0100, "Vijolicni.oblak" <un.info@xxxxxxx>  said:

> I will make a suggestion on how to improve file handling performance:

> With AMD64 you are able to make 48-bit addresses, which amount to 256000
> gigabytes of virtual memory. When working with large (eg. 10GB) video or
> database files, Linux kernel could map the whole file into the virtual
> memory using processor's Page Translation Mechanism.
> 
> Those 10GB would then be mapped to a certain memory range. If a portion of
> file that is currently requested is in physical RAM the processor would
> handle it without OS intervention; if not, then a page fault (#PF, 14)
> exception would occur and read a missing page (a missing portion of file).
> 
> 
> 
> The application would see the file as a 10GB large array (or a string), or
> perhaps could map its own data structures into this memory space.

Congratulations... You've re-invented IBM's S/38 and AS/400 architecture. ;)

http://pages.sbcglobal.net/vleveque/AS400_Arch.doc

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