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Date: Mon, 24 May 2010 20:26:03 +0200
From: Andi Kleen <andi@firstfloor.org>
To: Russ Anderson <rja@sgi.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
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Subject: Re: Hardware Error Kernel Mini-Summit
Message-ID: <20100524182603.GA3429@gargoyle.fritz.box>
References: <4BF2C3D1.10009@redhat.com> <1274204560.17703.82.camel@Joe-Laptop.home> <20100518185305.GA23921@elte.hu> <987664A83D2D224EAE907B061CE93D53C61D1C57@orsmsx505.amr.corp.intel.com> <20100518191802.GG25224@aftab> <m1k4r0c0y7.fsf@fess.ebiederm.org> <20100518222832.GJ22675@basil.fritz.box> <m1wrv0zo9q.fsf@fess.ebiederm.org> <20100519090323.GA18073@basil.fritz.box> <20100524162124.GB7145@sgi.com>
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> Having the infrastructure to automatically off-line pages
> is a good thing.  The details of where to set the predictive

It's already there with a modern mcelog in daemon mode 
and a recent kernel that supports soft offlining.

> threshold likely will be hardware specific (different DIMM
> types failing at different rates).  It needs to be adjustable.

The current default in mcelog is 10 corrected errors per 24h
per 4k page or 1 uncorrected error on the page (if your CPU
supports recovering from that).  It is on by default. 

You can configure it to be different if you want.

-Andi