Re: 4.13.0-rc4 sparc64: can't allocate MSI-X affinity masks for 2 vectors

[Christoph Hellwig]

On Tue, Aug 22, 2017 at 09:31:39AM -0700, David Miller wrote:
> > I fear my commit message (but not the code) might be wrong.
> > irq_create_affinity_masks can return NULL any time we don't have any
> > affinity masks.  I've already had a discussion about this elsewhere
> > with Bjorn, and I suspect we need to kill the warning or move it
> > to irq_create_affinity_masks only for genuine failure cases.
> 
> This is a rather large machine with 64 or more cpus and several NUMA
> nodes.  Why wouldn't there be any affinity masks available?

The drivers only asked for two MSI-X vectors, and marked bost of them
as pre-vectors that should not be spread.  So there is no actual
vector left that we want to actually spread.