linux-kernel - Re: [PATCHSET] percpu: generalize first chunk allocators and improve lpage NUMA support

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Message-ID: <4A4418EA.9000705@kernel.org>
Date:	Fri, 26 Jun 2009 09:40:10 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Andi Kleen <andi@...stfloor.org>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	linux-arch@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de,
	cl@...ux-foundation.org
Subject: Re: [PATCHSET] percpu: generalize first chunk allocators and improve
 lpage NUMA support

Andi Kleen wrote:
>> I don't know why, but in the configuration I saw each percpu area was
>> something like 1.8 MB.
> 
> That sounds like something that needs to be investigated and fixed then.
> In a sense per cpu space is precious like stack space and shouldn't 
> be wasted.

The large percpu space is most likely from lockdep.

Thanks.

-- 
tejun
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