On Fri, Mar 26, 2010 at 5:02 AM, Paul Mundt [off-list ref] wrote:

On Fri, Mar 26, 2010 at 02:47:59AM +0000, Jamie Lokier wrote:

quoted

It's possible in principle to run many non-MMU binaries on MMU
kernels, but I've never heard of anyone doing it.

FDPIC supports running the same binaries with or without MMU depending on
your ABI, it's not really that uncommon, even if it's mostly just used
for prototyping.

I would imagine that the chance that a restart will fail anyway when
restoring an MMU process on a non-MMU kernel. However, as you suggest,
the other way around should be possible. Thanks for clearing that up.

Specifically, do you know the meaning of the end_brk field on the
mm_context_t struct and if I need to checkpoint it on restart for
non-MMU systems (and potentially do something more clever during
restart on an MMU kernel?)