[Intel-wired-lan] [PATCH v4 4/4] PCI: Limit pci_alloc_irq_vectors() to housekeeping CPUs

Thomas Gleixner tglx at linutronix.de
Mon Oct 26 20:11:02 UTC 2020

On Mon, Oct 26 2020 at 12:21, Jacob Keller wrote:
> On 10/26/2020 12:00 PM, Thomas Gleixner wrote:
>> How does userspace know about the driver internals? Number of management
>> interrupts, optimal number of interrupts per queue?
> I guess this is the problem solved in part by the queue management work
> that would make queues a thing that userspace is aware of.
> Are there drivers which use more than one interrupt per queue? I know
> drivers have multiple management interrupts.. and I guess some drivers
> do combined 1 interrupt per pair of Tx/Rx..  It's also plausible to to
> have multiple queues for one interrupt .. I'm not sure how a single
> queue with multiple interrupts would work though.

For block there is always one interrupt per queue. Some Network drivers
seem to have seperate RX and TX interrupts per queue.



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