linux-kernel - Re: [patch] genapic: always use physical delivery mode on

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Message-ID: <20061128111414.A16460@unix-os.sc.intel.com>
Date:	Tue, 28 Nov 2006 11:14:15 -0800
From:	"Siddha, Suresh B" <suresh.b.siddha@...el.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	mm-commits@...r.kernel.org, ak@...e.de, ashok.raj@...el.com,
	akpm@...l.org, linux-kernel@...r.kernel.org
Subject: Re: [patch] genapic: always use physical delivery mode on > 8 CPUs

On Tue, Nov 28, 2006 at 07:33:46AM +0100, Ingo Molnar wrote:
> -	if (clusters <= 1 && max_cluster <= 8 && cluster_cnt[0] == max_cluster)
> +	if (max_apic < 8)

Patch mostly looks good.  Instead of checking for max_apic, can we use
	cpus_weight(cpu_possible_map) <= 8

This will help where initially system booted with <= 8 cpus and hotplug
potentially can bringup more cpus later..

thanks,
suresh
	
>  		genapic = &apic_flat;
>  	else
> -		genapic = &apic_cluster;
> +force_physflat:
> +		genapic = &apic_physflat;
-
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