Messages in this thread | | | Subject | Re: PATCH: Fix race in cpu_down (hotplug cpu) | From | Nigel Cunningham <> | Date | Mon, 19 Sep 2005 15:35:22 +1000 |
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On Mon, 2005-09-19 at 15:28, Srivatsa Vaddagiri wrote: > On Mon, Sep 19, 2005 at 03:23:01PM +1000, Nigel Cunningham wrote: > > Maybe I'm just an ignoramus, but I was thinking (without being a > > scheduler expert at all) that if the idle thread was already running, > > trying to set it up to run next might possibly have zero effect. I've > > sched_idle_next actually adds the idle task to its runqueue (normally > it is not present in a runqueue while running) and as well changes its > priority/policy. So it does have *some* effect!
Ok.
> > added a bit of debugging code to try and see in better detail what's > > happening. > > Could you elaborate (with some stack traces maybe) on the deadlock you are > seeing during resume? Maybe that can throw some light.
I'll try. I'm having trouble reproducing it now (yes, having reversed my patch!).
Regards,
Nigel --
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