Re: [PATCH] pci: irq: Add an early parameter to limit pci irq numbers

[Huacai Chen]

Hi, Jason,

On Thu, Jun 1, 2023 at 3:14 AM Jason Gunthorpe <jgg@xxxxxxxx> wrote:
>
> On Mon, May 29, 2023 at 02:52:29PM +0800, Huacai Chen wrote:
>
> > > But IMO what you are proposing seems like usecase driven and may not work all
> > > the time due to architecture limitation. This again proves that the existing
> > > solution is sufficient enough.
>
> > Yes, it's a usecase driven solution, so I provide a cmdline parameter
> > to let the user decide.
>
> The NIC drivers should be consuming interrupts based on the number of
> queues they are using, and that is something you can control from the
> command line, eg ethtool IIRC. Usually it defaults to the number of
> CPUs.
>
> Basically, you want to enable the user to configure the system with a
> user specified reduced number of NIC queues, and we already have way
> to do that.
Yes, ethtool is a possible way, thank you very much.

Huacai
>
> Jason