5.3.3. Enable Large Prefetchable BAR Support
The CN5000 VF BAR space is prefetchable and larger than the Linux default prefetch window. Add the following parameter to the kernel boot command line:
pci=hpmmioprefsize=1G,realloc
Notes:
Tune 1G upward if multiple adapters require large prefetchable BAR space.
Additional tuning may be required if other adapters consume a significant portion of the prefetchable space, affecting the CN5000 allocation due to alignment overhead.