Messages in this thread | | | Date | Thu, 28 Sep 2017 14:05:32 +0200 | From | Peter Zijlstra <> | Subject | Re: sched: serial port lockdep warning when offlining CPUs |
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On Thu, Sep 28, 2017 at 11:45:30AM +0000, Levin, Alexander (Sasha Levin) wrote: > Okay, that seems to have delt with the callbacks supressed issue. > > I also seem to be hitting it as a result of the scheduler triggering a > WARN, where print_stack_trace(), for example, just uses printk(). > > Now I'm not sure what's your approach here, do we keep converting > printk to printk_deferred one by one until we whacked every mole?
Nah.. WARN's _should_ not trigger. If they do we fix that.
Getting a lockdep splat after a WARN is something I can live with.
And you really don't want that deferred nonsense for WARNs, because that means you'll risk not over getting the output.
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