Re: [PATCH v2 1/2] genirq: Retain depth for managed IRQs across CPU hotplug

[Brian Norris]

On Wed, Jun 18, 2025 at 12:17:17PM +0200, Johan Hovold wrote:
> On Thu, Jun 12, 2025 at 11:40:38AM -0700, Brian Norris wrote:
> > For the record, I was reminded that DWC/pcie-qcom does not, in fact,
> > support irq_chip::irq_set_affinity(), which could perhaps be a unique
> > factor in his systems' behavior.
> 
> No, we use the GIC ITS for the NVMe interrupts on X1E so that should
> not be involved here.

Huh, interesting callout. I had looked at trying that previously on
another DWC-based platform, for the same reasons noted in that
switchover.

Anyway, all I can tell you is that Alex's logs clearly showed:

  set affinity failed(-22)

for what looked like the NVMe interrupts during CPU unplug / migration.

Brian