On 11/14/2017 07:17 PM, Peter Zijlstra wrote: > On Tue, Nov 14, 2017 at 07:01:55PM +0100, Daniel Bristot de Oliveira wrote: >> On 11/14/2017 06:40 PM, Peter Zijlstra wrote: >>> On Tue, Nov 14, 2017 at 06:17:13PM +0100, Daniel Bristot de Oliveira wrote: >>> >>>> IIRC, if the dest cpu is idle and the system is with idle=poll, no IPI >>>> is fired as well, but that is not a very common case. >>> >>> You're thinking about wake from idle? That is almost always without IPI, >>> even without idle=poll. >>> >> >> I meant the resched_curr(rq) of an rq on another CPU. If the dest is >> idle && idle=poll, the IPI will not be send. > > I'm saying the IPI will not be send even without idle=poll. MWAIT based > idle will also have TIF_POLLING_NRFLAG set. > Yeah! you are right! I missed that point... sorry :-) -- Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
