On Wed, 15 Jul 2015, Christoph Hellwig wrote: > Many years ago we decided to move setting of IRQ to core affnities to > userspace with the irqbalance daemon. > > These days we have systems with lots of MSI-X vector, and we have > hardware and subsystem support for per-CPU I/O queues in the block > layer, the RDMA subsystem and probably the network stack (I'm not too > familar with the recent developments there). It would really help the > out of the box performance and experience if we could allow such > subsystems to bind interrupt vectors to the node that the queue is > configured on. > > I'd like to discuss if the rationale for moving the IRQ affinity setting > fully to userspace are still correct in todays world any any pitfalls > we'll have to learn from in irqbalanced and the old in-kernel affinity > code. I think setting an initial affinity is not going to create the horror of the old in-kernel irq balancer again. It still could be changed from user space and does not try to be smart by moving interrupts around in circles all the time. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
