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

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Message-ID: <20080411113746.GV10019@one.firstfloor.org>
Date:	Fri, 11 Apr 2008 13:37:46 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Pavel Machek <pavel@....cz>, Jiri Kosina <jkosina@...e.cz>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andi Kleen <andi@...stfloor.org>,
	Zdenek Kabelac <zdenek.kabelac@...il.com>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: BUG: using smp_processor_id() during suspend with 2.6.25-rc8

> thanks Pavel, i picked this up into sched-devel.git - it makes sense 
> independently of whether it solves the warning.

This means the CPU preempt sanity checking is effectively disabled
on UP kernels. Even though more and more people should run multi-core
now there is still a sizeable user base left on single core.

Don't think this is a good idea. We need even the UP testers.

If he wants this for suspend or machine check/oops (always useful there
to disable such warnings) then there should
be separate checks for this. Perhaps system_state could be enhanced for this?

-Andi

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