linux-kernel - Re: [PATCH v9 1/8] x86/apic/x2apic: Allow CPU cluster

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Date:   Thu, 16 Feb 2023 14:58:10 -0600
From:   Kim Phillips <kim.phillips@....com>
To:     Usama Arif <usama.arif@...edance.com>, dwmw2@...radead.org,
        tglx@...utronix.de
Cc:     arjan@...ux.intel.com, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, hpa@...or.com, x86@...nel.org,
        pbonzini@...hat.com, paulmck@...nel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        rcu@...r.kernel.org, mimoja@...oja.de, hewenliang4@...wei.com,
        thomas.lendacky@....com, seanjc@...gle.com, pmenzel@...gen.mpg.de,
        fam.zheng@...edance.com, punit.agrawal@...edance.com,
        simon.evans@...edance.com, liangma@...ngbit.com,
        David Woodhouse <dwmw@...zon.co.uk>
Subject: Re: [PATCH v9 1/8] x86/apic/x2apic: Allow CPU cluster_mask to be
 populated in parallel

On 2/15/23 8:54 AM, Usama Arif wrote:
> -
> -	cluster_hotplug_mask = kzalloc_node(sizeof(*cluster_hotplug_mask),
> -					    GFP_KERNEL, node);
> -	if (!cluster_hotplug_mask)
> -		return -ENOMEM;
> -	cluster_hotplug_mask->node = node;
> -	return 0;
> +	/*
> +	 * No CPU in the cluster has ever been initialized, so fall through to
> +	 * the boot time code which will also populate the cluster mask for any
> +	 * other CPU in the cluster which is (now) present.
> +	 */
> + alloc:
> +	cmsk = kzalloc_node(sizeof(*cmsk), GFP_KERNEL, node);
> +	if (!cmsk)
> + 		return -ENOMEM;

.git/rebase-apply/patch:167: space before tab in indent.
  		return -ENOMEM;

> +	per_cpu(cluster_masks, cpu) = cmsk;
> +	prefill_clustermask(cmsk, cpu, cluster);
> +
> + 	return 0;

.git/rebase-apply/patch:171: space before tab in indent.
  	return 0;
warning: 2 lines add whitespace errors.

Other than that:

Tested-by: Kim Phillips <kim.phillips@....com>

Thanks,

Kim