Re: Affinity managed interrupts vs non-managed interrupts

[Dou Liyang]

Hi,
At 09/11/2018 05:13 PM, Christoph Hellwig wrote:
> On Thu, Sep 06, 2018 at 01:46:46PM +0200, Thomas Gleixner wrote:
> > I think the right solution for these pre/post vectors is to _NOT_ mark
> > them managed and leave them as regular interrupts which can be affinity
> > controlled and also can move freely on hotplug.
>
> Yes, agreed.  Marking the pre/post vector as managed was a mistake
> (and I don't think it even was intentional, at least on my part).
Got it !

And, I am trying to fix this by:

 -Don't set affinity for pre/post vectors in
  irq_create_affinity_masks().

 -And do not setup the desc->affinity of pre/post vectors in
  alloc_msi_entry().

So, the affinity in alloc_descs() will be NULL, and the interrupt won't
be marked as IRQD_AFFINITY_MANAGED.

Is it OK? and I will show the codes after testing it.

Thanks,
	dou