linux-kernel - Re: Warning in during hotplug on 2.6.27-rc2-git5

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Date:	Sun, 17 Aug 2008 04:23:23 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Greg KH <greg@...ah.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Langsdorf, Mark" <mark.langsdorf@....com>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Warning in during hotplug on 2.6.27-rc2-git5

> > > 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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