linux-kernel - Re: lockdep: access percpu variable too early

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Message-ID: <CACVXFVMN8=6aLf2NGaLCiLjH+yy7wSmWyRG0w09--0au1vGnLg@mail.gmail.com>
Date:	Wed, 6 Mar 2013 18:30:41 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: lockdep: access percpu variable too early

On Wed, Mar 6, 2013 at 6:20 PM, Ingo Molnar <mingo@...nel.org> wrote:
>
> What's the practical effect of it? Do we copy the value from the boot CPU and thus
> the secondary CPUs start with slightly increased stats?

Yes, it is the major effect.

Also the arch dependent __my_cpu_offset might be initialized a bit late.

Thanks,
--
Ming Lei
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