linux-kernel - Re: [PATCH 08/10] x86: Change NR_CPUS arrays in numa

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Date:	Mon, 14 Jan 2008 09:17:19 -0800
From:	Mike Travis <travis@....com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Andrew Morton <akpm@...ux-foundation.org>, Andi Kleen <ak@...e.de>,
	Christoph Lameter <clameter@....com>,
	Jack Steiner <steiner@....com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/10] x86: Change NR_CPUS arrays in numa_64

Ingo Molnar wrote:
> * travis@....com <travis@....com> wrote:
> 
>> Change the following static arrays sized by NR_CPUS to
>> per_cpu data variables:
>>
>> 	char cpu_to_node_map[NR_CPUS];
> 
> x86.git randconfig testing found the !NUMA build bugs below.
> 
> 	Ingo

Thanks!  I'll add this in.

Mike

> 
> --------------->
> ---
>  arch/x86/kernel/setup_64.c   |    2 ++
>  arch/x86/kernel/smpboot_64.c |    4 ++++
>  2 files changed, 6 insertions(+)
> 
> Index: linux/arch/x86/kernel/setup_64.c
> ===================================================================
> --- linux.orig/arch/x86/kernel/setup_64.c
> +++ linux/arch/x86/kernel/setup_64.c
> @@ -379,7 +379,9 @@ void __init setup_arch(char **cmdline_p)
>  #ifdef CONFIG_SMP
>  	/* setup to use the early static init tables during kernel startup */
>  	x86_cpu_to_apicid_early_ptr = (void *)&x86_cpu_to_apicid_init;
> +#ifdef CONFIG_NUMA
>  	x86_cpu_to_node_map_early_ptr = (void *)&x86_cpu_to_node_map_init;
> +#endif
>  	x86_bios_cpu_apicid_early_ptr = (void *)&x86_bios_cpu_apicid_init;
>  #endif
>  
> Index: linux/arch/x86/kernel/smpboot_64.c
> ===================================================================
> --- linux.orig/arch/x86/kernel/smpboot_64.c
> +++ linux/arch/x86/kernel/smpboot_64.c
> @@ -864,8 +864,10 @@ void __init smp_set_apicids(void)
>  		if (per_cpu_offset(cpu)) {
>  			per_cpu(x86_cpu_to_apicid, cpu) =
>  						x86_cpu_to_apicid_init[cpu];
> +#ifdef CONFIG_NUMA
>  			per_cpu(x86_cpu_to_node_map, cpu) =
>  						x86_cpu_to_node_map_init[cpu];
> +#endif
>  			per_cpu(x86_bios_cpu_apicid, cpu) =
>  						x86_bios_cpu_apicid_init[cpu];
>  		}
> @@ -876,7 +878,9 @@ void __init smp_set_apicids(void)
>  
>  	/* indicate the early static arrays are gone */
>  	x86_cpu_to_apicid_early_ptr = NULL;
> +#ifdef CONFIG_NUMA
>  	x86_cpu_to_node_map_early_ptr = NULL;
> +#endif
>  	x86_bios_cpu_apicid_early_ptr = NULL;
>  }
>  

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