Re: lockdep: access percpu variable too early

From: Ingo Molnar
Date: Wed Mar 06 2013 - 05:34:16 EST



* Ming Lei <ming.lei@xxxxxxxxxxxxx> wrote:

> On Wed, Mar 6, 2013 at 6:20 PM, Ingo Molnar <mingo@xxxxxxxxxx> 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.

I suspect we could try to fix it - post-initializing it after percpu setup sounds
like a viable option, if it does not get too ugly.

Thanks,

Ingo
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