x32 abi support?

Frank Ch. Eigler fche at redhat.com
Wed May 16 14:20:45 UTC 2012

mjg59 wrote:

> [...]  If you have any applications that need to be 64-bit (ie,
> anything that is going to need more than 4GB of address space, which
> is very different from needing more than 4GB of RAM) then you need
> to have two copies of your libraries and suddenly your memory
> benefits have entirely vanished. [...]

This is not clear to me.  The unwelcome duplication for this case
would consist only of the 64-bit shared libraries' own text & data -
and not the data of the 64-bit apps themselves.  Thus having x32 on
the system is still a win *if* the memory savings from the x32 apps is
larger than the duplicated 64-bit shlib text/data.

- FChE

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