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Date: Tue, 24 Feb 2009 00:40:01 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Tilman Schmidt <t.schmidt@phoenixsoftware.de>,
       linux-kernel@vger.kernel.org, stable@kernel.org,
       Jeremy Fitzhardinge <jeremy@xensource.com>
Subject: Re: [2.6.28.7] BUG: using smp_processor_id() in preemptible
 [00000000] code: pageattr-test/207
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On Tue, 24 Feb 2009 09:30:28 +0100 Ingo Molnar <mingo@elte.hu> wrote:

> 
> * Tilman Schmidt <t.schmidt@phoenixsoftware.de> wrote:
> 
> > On Mon, 23 Feb 2009 15:13:31 -0800, Andrew Morton <akpm@linux-foundation.org> wrote:
> > > A 2.6.28.6 -> 2.6.28.7 regressionlet.
> > > 
> > > This, I bet:
> > > 
> > > commit 2cf155b300c4839a7238b825c7c5f417e9d7cc68
> > > Author: Jeremy Fitzhardinge <jeremy@goop.org>
> > > Date:   Wed Feb 11 09:32:19 2009 -0800
> > > 
> > >     x86/cpa: make sure cpa is safe to call in lazy mmu mode
> > >     
> > >     commit 4f06b0436b2ddbd3b67b10e77098a6862787b3eb upstream.
> > 
> > Jackpot! Reverted that commit on 2.6.28.7, and the BUG messages are gone.
> 
> should be fixed by this as well:
> 
> d85cf93: x86/paravirt: make arch_flush_lazy_mmu/cpu disable preemption
> 

Yup, that patch got lost.

commit d85cf93da66977dbc645352be1b2084a659d8a0b
Author: Jeremy Fitzhardinge <jeremy@goop.org>
Date:   Thu Feb 12 10:02:56 2009 -0800

    x86/paravirt: make arch_flush_lazy_mmu/cpu disable preemption

from Linus mainline is needed in 2.6.28.8, please.