The merging of anon_vma and 4G/4G
Posted Jun 3, 2004 15:59 UTC (Thu) by salex
Parent article: The merging of anon_vma and 4G/4G
> The real hope, however, is that a serious transition to 64-bit systems will happen before too long.
I'd suggest looking at the history of the PDP-11 for some idea of what "too long" might mean. Despite the various efforts that DEC made (notably compatability mode on the VAX), the 11s continued for many years and continued to have to deal with the limitations of a 16 bit address space. I certainly hope Linux doesn't ever have to deal with separate I+D or overlays, but if Linux is going to continue to keep an eye on making old and cheap hardware run fast, I would expect that the developers will be looking at how to shoehorn more into a 32 bit address space for years at least.
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