Re: [PATCH v2] block: fix rdma queue mapping

Christoph Hellwig
2018-10-18T00:33:51Z

On Wed, Oct 03, 2018 at 02:05:16PM -0500, Steve Wise wrote:
> Christoph, Sagi: it seems you think /proc/irq/$IRP/smp_affinity
> shouldn't be allowed if drivers support managed affinity. Is that correct?

Not just shouldn't, but simply can't.

> But as it stands, things are just plain borked if an rdma driver
> supports ib_get_vector_affinity() yet the admin changes the affinity via
> /proc...

I think we need to fix ib_get_vector_affinity to not return anything
if the device doesn't use managed irq affinity.