I have been trying to reserve more bridge memory for PCI hot plug devices using the kernel command line option 'pci=hpmemsize=256M,realloc'. This ends up causing an issue for non-prefetchable memory where the kernel fails to assign memory due to the size used for hpmemsize.

I actually only need to reserve hotplug bridge memory for prefetchable memory and not non-prefetchable memory, but the hpmemsize option seems to apply to both. Is there any way to only reserve extra hotplug bridge prefetchable memory and use the default for non-prefetchable memory?