Messages in this thread | | | Date | Wed, 8 Apr 2009 14:26:13 +0200 | From | Ingo Molnar <> | Subject | Re: pm-hibernate : possible circular locking dependency detected |
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* Rusty Russell <rusty@rustcorp.com.au> wrote:
> On Tuesday 07 April 2009 16:35:53 Peter Zijlstra wrote: > > On Tue, 2009-04-07 at 13:56 +0930, Rusty Russell wrote: > > > Looks like this will be fixed by Andrew's work-on-cpu-in-own-thread > > > patch which I just put out the pull request for. > > > > Would it make sense to teach it about a short-circuit like: > > > > work_on_cpu() { > > > > if (cpumask_weight(current->cpus_allowed) == 1 && > > smp_processor_id() == cpu) > > return do_work_right_here(); > > Does that happen much? I guess put a counter in and see?
a temporary tracepoint or trace_printk() for the workqueue tracer would also tell this, without any long-term overhead (it will be easy to remove it).
Ingo
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