* Brian Martinez <brm (AT) msu (DOT) edu[2007-03-01 13:39:47]:

Hello folks,

I was curious about the maximum amount of RAM an BSD system will
recognize. Is there any way at all to get it to recognize more? Kernel
recompile? Sysctl options?

I've browsed through the archives here a bit and have found a few answers
relating to my question, but there were older. For instance, someone was
saying back in '03 that the maximum amount of RAM the S would recognize is
2GB. I happen to know that my amd64 system recognizes 4GB nowadays. But
the machine has 8GB of RAM.

Some other answers said it would never go higher than 2GB b/c it would
require an entire rewrite of the VM subcomponent (or something to that
effect). But again, my system currently recognizes 4GB, so it seems there
has been some progress.

Any definitive word on this? Thanks.

Well, if you want to get support for all that ram, well, the devs
are going to need access to such a system. They don't have that
stuff lying around.

From want.html An amd64 with more than 4 GB RAM for hacking on large
memory support in i386 and amd64, needed in London, UK. Contact
tom (AT) openbsd (DOT) org.