Date: Sun, 17 Aug 2008 04:23:23 +0200
From: Andi Kleen <andi@firstfloor.org>
To: Greg KH <greg@kroah.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
       "Langsdorf, Mark" <mark.langsdorf@amd.com>,
       Andi Kleen <andi@firstfloor.org>, linux-kernel@vger.kernel.org,
       Ingo Molnar <mingo@elte.hu>, Andrew Morton <akpm@linux-foundation.org>
Subject: Re: Warning in during hotplug on 2.6.27-rc2-git5
Message-ID: <20080817022323.GN19125@one.firstfloor.org>
References: <200808141753.58547.rjw@sisk.pl> <20080814163450.GA13814@one.firstfloor.org> <6453C3CB8E2B3646B0D020C112613273C5AC71@sausexmb4.amd.com> <200808162128.25330.rjw@sisk.pl> <20080816201813.GA30715@kroah.com>
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> > > I'm still seeing it on 2.6.27-rc2, even with the 
> > > patch here http://lkml.org/lkml/2008/7/30/171 and the
> > > wbinvd_halt code patch applied.  Maybe something else
> > > broke in some of the recent hotplug changes?
> > 
> > My guess is that MCE does somthing that is not allowed by sysfs any more.
> 
> Hm, sysfs hasn't changed any in 2.6.27-rcX that I know of.

mce hasn't either in this regard. My current theory is that the CPU 
up/down notifiers are not balanced anymore (as in duplicated up events) 

Would need to add printk to verify that.

-Andi
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