linux-kernel - Re: BUG: using smp_processor_id() in preemptible arch_trigger_all_cpu_backtrace

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Message-ID: <20101101153755.GB5985@lenovo>
Date:	Mon, 1 Nov 2010 18:37:55 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Jan Kiszka <jan.kiszka@....de>
Cc:	Don Zickus <dzickus@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Eric Paris <eparis@...hat.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: BUG: using smp_processor_id() in preemptible
	arch_trigger_all_cpu_backtrace_handler

On Mon, Nov 01, 2010 at 01:39:56PM +0100, Jan Kiszka wrote:
> Hi,
> 
> I was getting this BUG while running into a GPF:
> 
> BUG: using smp_processor_id() in preemptible [00000000] code: qemu-system-x86/2248
> caller is arch_trigger_all_cpu_backtrace_handler+0x1d/0xf7
> Pid: 2248, comm: qemu-system-x86 Not tainted 2.6.36+ #12
> Call Trace:
> [<ffffffff81203194>] debug_smp_processor_id+0xd8/0xf4
> [<ffffffff813803ab>] arch_trigger_all_cpu_backtrace_handler+0x1d/0xf7
...

 Thanks for report Jan. I'll take a look as only get ability.

 Cyrill
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