On Wed, Jun 19, 2024 at 12:56:44PM +1000, Dave Chinner wrote: > I'm not sure that the NFS server needs to reinvent the wheel here... > > > Network devices (and storage devices) are affined to one > > NUMA node. > > NVMe storage devices don't need to be affine to the node. They just > need to have a hardware queue assigned to each node so that > node-local IO always hits the same hardware queue and gets > completion interrupts returned to that same node. > > And, yes, this is something that still has to be configured > manually, too. For NVMe no manual configuration is required. It uses the blk_mq_pci_map_queues helper to spread the queues around optimally. If enough queues are available every core gets one, else they are spread so that close cores share queues.
