I'm really unsure CFQ is the (only ?) culprit. I've met the same behaviour using deadline and a 3ware 9650, and the fix was a completely other thing (pci_set_mwi). See https://bugzilla.redhat.com/show_bug.cgi?id=444759 for more details.
I'm really unsure CFQ is the (only ?) culprit. /bugzilla. redhat. com/show_ bug.cgi? id=444759 for more details.
I've met the same behaviour using deadline and a 3ware 9650, and the fix was a completely other thing (pci_set_mwi).
See https:/