First Post.... I have a dual P4 with 2Gb memory, and a VMIC Reflective memory card that has 128Mb memory. To get this to work on RH7.3, I had to turn on HI mem 4GB and reduce the Virtual memory to 1GB. I have upgraded to Redhat 8.0 and tried to reconfig the kernel with HI Mem4GB ON, but I cannot open the reflective memory device /dev/rfmg2, after recompiling/installing the driver software from VMIC.
Can anyone explain what I need to do to get the memory mapped correctly so that this device will be seen by the kernel? It is listed in /proc/iomem and the driver "module" is loaded and running. The diag utility (recompiled) terminates with an error "Can't open device".

By the way, the VMIC reflective memory is on a PCI card.

Thanks in advance for your help!!
Merlin53