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That file should not be empty. This is from a r80 open server mgmt server for the normal section of the boot loader.



title Start in normal mode
root (hd0,0)
kernel /vmlinuz...

Can you show where you did so? Just making sure you put it in the right spot. Should be on the kernel line.

I’m not sure it only effects boot up. None cachable ram is bad. The big posted made it sound like just about any data structure could end up in that range and have a performance impact.

Of course...

Something like /boot/grub/menu.1st

The red hat bug you posted says it needs to be enabled (which doesn’t seem to be default for red hat). What I don’t know is if the code to support it is there or...

Did you try setting acpi_mcfg_max_pci_bus_num=on in your menu.1st file?