linux-kernel - Re: [PATCH 6/9] x86: only call smp_processor

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Message-ID: <20101201180724.GA6478@lenovo>
Date:	Wed, 1 Dec 2010 21:07:24 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Don Zickus <dzickus@...hat.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>,
	Robert Richter <robert.richter@....com>, ying.huang@...el.com,
	Andi Kleen <andi@...stfloor.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 6/9] x86: only call smp_processor_id in non-preempt
	cases

On Tue, Nov 30, 2010 at 05:27:27PM -0500, Don Zickus wrote:
> There are some paths that walk the die_chain with preemption on.
> Make sure we are in an NMI call before we start doing anything.
> 
> This was triggered by do_general_protection calling notify_die with
> DIE_GPF.
> 
> Reported-by: Jan Kiszka <jan.kiszka@....de>
> Signed-off-by: Don Zickus <dzickus@...hat.com>
> ---
>  arch/x86/kernel/apic/hw_nmi.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)

yup, thanks Don!
 
  Cyrill
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