> * Marvell mv78xx0 and kirkwood (armv5 pj1) were fairly > powerful in 2008 and could support at least 1GB of RAM, > but I only found one machine (OpenBlocks A7) that does > this. It's unclear if anyone is still updating kernels > on this machine, but they could /probably/ use > VMSPLIT_3G_OPT if they do.
If i remember correctly, there was a design issue with the OpenBlocks A7, and it would not run with its full amount of memory. To get a stable system you had to limit the RAM. I don't remember if that was just with the NULL series, and it was fixed for mass production devices, or they are all broken. I doubt there are any mv78xx0 machines left, why where never very popular, but there are still Kirkwood NAS boxes around. I keep mine up to date, put an LTS kernel on it once a year, update to the latest debian sid. Andrew