Did you do that with e820 ( via the coreboot table)? I think you could reserve the stack area with E820. That would at least give back some of the memory.
Well linux cannot do ACPI reclaim. I simply supplied memory map from CMDline check the original patch. I had in plan to enable memory hotplug in ACPI so it would gain back the memory.
It also looks like we need a s3 aware CAR
Yes please check mine second link. There was lengthy discussion. I dont know how is it now but imho when CAR is not flushed back to main memory we have no problem?
Libo and Co. are working on the dbm690t platform K8 revf/g and rs690/sb600.
Thanks,
Rudolf