From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ashok Raj <ashok.raj@intel.com>
Date: Thu, 14 Jul 2005 18:03:43 +0000
Subject: Re: [RFC][patch 2/10] Multiple vector domain support - cpu and domain management
Message-Id: <20050714110342.B2630@unix-os.sc.intel.com>
List-Id: <linux-ia64.vger.kernel.org>
References: <42D62E73.1050108@jp.fujitsu.com>
In-Reply-To: <42D62E73.1050108@jp.fujitsu.com>
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To: linux-ia64@vger.kernel.org

On Thu, Jul 14, 2005 at 06:20:51PM +0900, Kenji Kaneshige wrote:
> 
> This patch add the code to handle the relationship between cpu and
> domains. We need more consideration about how to separate vector
> domains.
> 
> Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
> 
> ---
> 

Should we consider this based on some mach-* like schemes, so for e.g in
NUMA case we could use node as a VECTOR_DOMAIN? ... or maybe we could
somehow tie this into CPUSETS?..
 
> +
> +#ifdef CONFIG_VECTOR_DOMAIN
> +int ia64_cpu_domain_map[NR_CPUS];
> +cpumask_t ia64_domain_cpumask[NR_VECTOR_DOMAINS];
> +
> +void __devinit
> +ia64_attach_cpu_to_domain (int cpu)
> +{
> +	static int domain = -1;
> +
> +	/* Simple Round Robin for now */
> +	if (++domain >= NR_VECTOR_DOMAINS)
> +		domain = 0;
> +	ia64_cpu_domain_map[cpu] = domain;
> +	cpu_set(cpu, ia64_domain_cpumask[domain]);
> +}
> +#endif /* CONFIG_VECTOR_DOMAIN */

-- 
Cheers,
Ashok Raj
- Open Source Technology Center