netdev - Re: [PATCH v2 1/1] ice: Change assigning method of the CPU affinity masks

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Message-ID: <Y+5IWLpC1uTaa4Ks@smile.fi.intel.com>
Date:   Thu, 16 Feb 2023 17:14:32 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Pawel Chmielewski <pawel.chmielewski@...el.com>
Cc:     Jonathan.Cameron@...wei.com, baohua@...nel.org, bristot@...hat.com,
        bsegall@...gle.com, davem@...emloft.net, dietmar.eggemann@....com,
        gal@...dia.com, gregkh@...uxfoundation.org, hca@...ux.ibm.com,
        jacob.e.keller@...el.com, jesse.brandeburg@...el.com,
        jgg@...dia.com, juri.lelli@...hat.com, kuba@...nel.org,
        leonro@...dia.com, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux@...musvillemoes.dk, mgorman@...e.de, mingo@...hat.com,
        netdev@...r.kernel.org, peter@...jl.ca, peterz@...radead.org,
        rostedt@...dmis.org, saeedm@...dia.com, tariqt@...dia.com,
        tony.luck@...el.com, torvalds@...ux-foundation.org,
        ttoukan.linux@...il.com, vincent.guittot@...aro.org,
        vschneid@...hat.com, yury.norov@...il.com
Subject: Re: [PATCH v2 1/1] ice: Change assigning method of the CPU affinity
 masks

On Thu, Feb 16, 2023 at 03:54:55PM +0100, Pawel Chmielewski wrote:
> With the introduction of sched_numa_hop_mask() and for_each_numa_hop_mask(),
> the affinity masks for queue vectors can be conveniently set by preferring the
> CPUs that are closest to the NUMA node of the parent PCI device.

...

> +	v_idx = 0;

> +

Redundant blank line.

> +	for_each_numa_hop_mask(aff_mask, numa_node) {
> +		for_each_cpu_andnot(cpu, aff_mask, last_aff_mask) {
> +			if (v_idx >= vsi->num_q_vectors)

> +				goto out;

Useless. You can return 0; here.

> +			if (cpu_online(cpu)) {
> +				cpumask_set_cpu(cpu, &vsi->q_vectors[v_idx]->affinity_mask);
> +				v_idx++;
> +			}
> +		}
> +
> +		last_aff_mask = aff_mask;
> +	}
> +
> +out:
>  	return 0;

-- 
With Best Regards,
Andy Shevchenko