Wow, this is really amazing. I've always felt like 64-bit pointers were a huge waste of memory, since many small tools need well below 4 GB. Cache is always go

Wow, this is really amazing. I've always felt like 64-bit pointers were a huge waste of memory, since many small tools need well below 4 GB. Cache is always going be relatively small (unless semiconductor/transistor fabrication costs drop dramatically), and smaller pointers result in better cache usage, and consequently fewer cache misses. > Sadly, x32 was "very custom" and very hard to support. Last I heard x32 is being phased out from Linux kernel. This is really sad to hear. Do you happen to know of any kernel discussion threads on this besides this one[1]? (I'd love to chime in, in support of the X32 ABI.) I'm a little surprised honesty, as Linus has mentioned multiple times how important it is to him that the user-facing ABI remain stable. [1] https://lkml.org/lkml/2018/12/10/1145 https://lkml.org/lkml/2018/12/10/1145