linux-kernel - Re: [PATCH] x86, acpi: Handle all SRAT cpu entries even have cpu num limitation

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Date:	Wed, 15 Dec 2010 14:57:00 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Nikanth Karthikesan <knikanth@...e.de>,
	David Rientjes <rientjes@...gle.com>,
	"Zheng, Shaohui" <shaohui.zheng@...el.com>,
	"linux-hotplug@...r.kernel.org" <linux-hotplug@...r.kernel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	Venkatesh Pallipadi <venki@...gle.com>,
	Nikhil Rao <ncrao@...gle.com>,
	Takuya Yoshikawa <yoshikawa.takuya@....ntt.co.jp>
Subject: Re: [PATCH] x86, acpi: Handle all SRAT cpu entries even have cpu
 num limitation

On 12/15/2010 02:53 PM, H. Peter Anvin wrote:
> On 12/15/2010 02:40 PM, Yinghai Lu wrote:
>> On 12/15/2010 02:01 PM, H. Peter Anvin wrote:
>>> On 11/13/2010 05:38 PM, Yinghai Lu wrote:
>>>> Index: linux-2.6/arch/x86/kernel/acpi/boot.c
>>>> ===================================================================
>>>> --- linux-2.6.orig/arch/x86/kernel/acpi/boot.c
>>>> +++ linux-2.6/arch/x86/kernel/acpi/boot.c
>>>> @@ -198,6 +198,13 @@ static void __cpuinit acpi_register_lapi
>>>>  {
>>>>  	unsigned int ver = 0;
>>>>  
>>>> +#ifdef CONFIG_X86_64
>>>> +	if (id >= (MAX_APICS-1)) {
>>>> +		printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
>>>> +		return;
>>>> +	}
>>>> +#endif
>>>> +
>>>>  	if (!enabled) {
>>>>  		++disabled_cpus;
>>>>  		return;
>>>
>>> Why the #ifdef?
>>
>> try to limit the affects to 32bit's bunch sub arch etc.
>>
> 
> I really, really don't like that... we want more unification, not less...

ok, will try to remove them.

Yinghai
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