linux-kernel - Re: [rfc patch] x86,apic: fix DEBUG_PREEMPT gripe when booting with threadirqs=1

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Date:	Sun, 26 Jun 2011 12:45:21 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Mike Galbraith <mgalbraith@...e.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [rfc patch] x86,apic: fix DEBUG_PREEMPT gripe when booting with
 threadirqs=1


* Mike Galbraith <mgalbraith@...e.de> wrote:

> x86,apic: fix DEBUG_PREEMPT gripe when booting with threadirqs=1
> 
> If CONFIG_PREEMPT and CONFIG_INTR_REMAP are both set, and a box is
> booted with threadirqs, the gripe below is emitted.  It was suggested
> that native_smp_prepare_cpus() shouldn't need to be run with preemption
> disabled, and indeed, box boots with no hint of trouble.  Remove it.

Would also require a careful review of the code we take out of 
preempt protection now - have you done that by any chance? (if not, 
mind doing it?)

Thanks,

	Ingo
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