On Fri, 2008-12-05 at 01:41 +0100, Sascha Silbe wrote: > On Thu, Dec 04, 2008 at 03:20:02PM -0800, Dave Hansen wrote: > > >> I don't think that's possible. Both 32bit and 64bit userspace and > >> emulation work with a 64bit kernel, but at least 64bit userspace on a > >> 32bit kernel isn't possible. > > Believe it or not, people actually do this on powerpc. > Interesting. Is it possible on AMD64 as well? How does the additional > address space get managed? > As this is getting off topic, I'd suggest to move to private mails.
It is possible, but not ever implemented. amd64 doesn't have the same disadvantages when you go 32->64 bits as ppc. The additional address space is managed no differently than it is on a normal 32-bit system with more physical memory than can be addressed in the normal kernel linear mapping. (That's 2GB on Windows and 1GB on most Linux systems). -- Dave _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
