On Mar 30, 2018, at 03:11 PM, "Joao S. O. Bueno" <jsbueno@python.org.br> wrote:

Not only that, but afaik Linux could simply raise that 57bit virtual
to 64bit virtual without previous
warning on any version change.

The change from 48-bit to 57-bit virtual addresses was not done without any warning because that would have broken too much code (IIRC due to at least some JS environments assuming 48bit pointers).