Messages in this thread | | | Date | Thu, 20 Nov 2014 16:49:32 +0800 | From | Wanpeng Li <> | Subject | Re: [PATCH v5] sched/deadline: support dl task migration during cpu hotplug |
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Hi Peterz, Juri, On Thu, Nov 13, 2014 at 01:21:31PM +0300, Kirill Tkhai wrote: >> > Also, we should think about the following situation. >> > >> > DL task is left on dead rq. In your scheme it will be moved by the timer. >> > But what will be if somebody changes the class of the task (before timer)? >> >> I think timer will be cancelled in switched_from_dl(). > >Yeah, but nobody will move this task to alive rq. > >> > In this case the task still remains on dead rq. >> > >> > We should handle this situation in some way.
I think pang's patch handle the exclusive cpusets rd->span issue, the concern which Kirill mentioned above maybe the last one block the patch merged, is there any idea or proposal from you experts?
Regards, Wanpeng Li
>> > >> > Kirill >> > >> > >> > -- >> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >> > the body of a message to majordomo@vger.kernel.org >> > More majordomo info at http://vger.kernel.org/majordomo-info.html >> > Please read the FAQ at http://www.tux.org/lkml/ >> >
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