linux-kernel - Re: BUG: using smp_processor_id() during suspend with 2.6.25-rc8

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Message-ID: <87abk5qq6u.fsf@basil.nowhere.org>
Date:	Tue, 08 Apr 2008 00:02:17 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Zdenek Kabelac <zdenek.kabelac@...il.com>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: BUG: using smp_processor_id() during suspend with 2.6.25-rc8

Jiri Kosina <jkosina@...e.cz> writes:
>
> It is not safe to call smp_processor_id() in cases we are not sure someone 
> will not reschedule us.

We are sure. Machine checks always run with interrupts off.

Also BTW in a non preempt-rt kernel all exceptions run non preemptable
anyways.

-Andi
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