linux-kernel - Re: [origin tree build failure] Re: [PULL] Please pull hwpoison code for 2.6.32

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Message-ID: <20090926182043.GU30185@one.firstfloor.org>
Date:	Sat, 26 Sep 2009 20:20:43 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Andi Kleen <andi@...stfloor.org>, Ingo Molnar <mingo@...e.hu>,
	torvalds@...ux-foundation.org, fengguang.wu@...el.com,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [origin tree build failure] Re: [PULL] Please pull hwpoison code for 2.6.32

On Sat, Sep 26, 2009 at 11:15:23AM -0700, H. Peter Anvin wrote:
> We're definitely going to continue to have this problem until we decide we have hit the pain threshold either support external *zone* numbers or permit a 64-bit pageflags.

Yes I agree. I implemented a perfect hash scheme for the NUMA pfn->node
mapping a long time ago which is still there, that code could be probably
extended to support zones too. It would just make the hash slightly larger.

-Andi
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