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Date: Wed, 13 Jan 2010 14:36:19 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Suresh Siddha <suresh.b.siddha@intel.com>
CC: Andi Kleen <andi@firstfloor.org>, Yinghai Lu <yinghai@kernel.org>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       "ananth@in.ibm.com" <ananth@in.ibm.com>, Ingo Molnar <mingo@elte.hu>,
       Thomas Gleixner <tglx@linutronix.de>,
       Andrew Morton <akpm@linux-foundation.org>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -v2 5/5] x86: use dmi check to treat disabled cpus as
 hotplug cpus.
References: <1263338274-6485-1-git-send-email-yinghai@kernel.org>	 <1263338274-6485-5-git-send-email-yinghai@kernel.org>	 <1263340563.2854.1011.camel@sbs-t61.sc.intel.com>	 <4B4D0E39.10200@kernel.org> <87tyupfzk8.fsf@basil.nowhere.org>	 <4B4E427D.9090207@zytor.com> <20100113222348.GE24818@basil.fritz.box>	 <4B4E48BB.5030902@zytor.com> <1263421753.2865.103.camel@sbs-t61.sc.intel.com>
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On 01/13/2010 02:29 PM, Suresh Siddha wrote:
>>
>> Well, that *is* working around broken code, in this case the broken code
>> is the percpu allocation strategy.
> 
> Andi, Recently percpu folks changed the per-cpu static first chunk to
> PMD SIZE right. I think that is what causing all this issue.
> 

Please don't tell me we're allocating 2 MB per CPU and throwing away
most of it...
	
	-hpa