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. -- 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
