linux-kernel - Re: [Patch v1] i40e: limit the msix vectors based on housekeeping CPUs

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Date:   Tue, 16 Jun 2020 01:03:09 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Nitesh Narayan Lal <nitesh@...hat.com>
Cc:     linux-kernel@...r.kernel.org, frederic@...nel.org,
        mtosatti@...hat.com, sassmann@...hat.com,
        jeffrey.t.kirsher@...el.com, jacob.e.keller@...el.com,
        jlelli@...hat.com
Subject: Re: [Patch v1] i40e: limit the msix vectors based on housekeeping
 CPUs

On Mon, Jun 15, 2020 at 04:21:25PM -0400, Nitesh Narayan Lal wrote:
> +	hk_flags = HK_FLAG_DOMAIN | HK_FLAG_WQ;
> +	mask = housekeeping_cpumask(hk_flags);
> +	cpus = cpumask_weight(mask);

Code like this has no business inside a driver.  Please provide a
proper core API for it instead.  Also please wire up
pci_alloc_irq_vectors* to use this API as well.