On Wed, Jun 04, 2014 at 10:27:25AM +0800, Lai Jiangshan wrote: > > Hmm, yes I think you're right. A queued wakeup can miss an affinity > > change like that. > > > > Something like the below ought to cure that I suppose.. > > As a non-scheduler developer, I can't find anything wrong with the patch > (I searched all on_rq in kernel/sched).
You did fine finding that hole, so who knows, you might become one real soon now ;-) > but I think __migrate_task() is slow path comparing to sched_ttwu_pending(). > So I prefer to change set_cpus_allowed_ptr() and __migrate_task() rather than > to sched_ttwu_pending(). Yes, I agree, something there would be better, but I couldn't find anything without holes in.
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