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Date: Mon, 15 Jun 2009 19:07:26 +0200
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH 00/22] HWPOISON: Intro (v5)
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Cc: Andi Kleen <andi@firstfloor.org>, Hugh Dickins <hugh.dickins@tiscali.co.uk>, Wu Fengguang <fengguang.wu@intel.com>, Balbir Singh <balbir@linux.vnet.ibm.com>, Andrew Morton <akpm@linux-foundation.org>, LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>, Mel Gorman <mel@csn.ul.ie>, Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>, Peter Zijlstra <a.p.zijlstra@chello.nl>, Nick Piggin <npiggin@suse.de>, "riel@redhat.com" <riel@redhat.com>, "chris.mason@oracle.com" <chris.mason@oracle.com>, "linux-mm@kvack.org" <linux-mm@kvack.org>
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> But then if you
> can't sort the resulting mess out because your patches are too limited
> its not useful yet is it.

With "too limited" you refer to unpoisioning?

Again very slowly:

- If you have a lot of errors you die eventually anyways.
- If you have a very low rate of errors (which is the normal case) you don't 
need unpoisioning because the memory lost for each error is miniscule.
- In the case of a hypervisor it's actually not memory lost, but only
guest physical address space, which is plenty on a 64bit system. You can 
eventually replace it by readding memory to a guest, but that's unlikely
to be needed.

-Andi
-- 
ak@linux.intel.com -- Speaking for myself only.

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