On Tue, 12 Aug 2014, Stephen Boyd wrote: > On 08/05/14 19:34, Nicolas Pitre wrote: > > > >> It allows us to synchronize with another CPU that may be inside > >> gic_raise_softirq(). If the other CPU was in that function then this CPU > >> would wait until it was done sending the IPI to continue along and > >> reroute them. If the other CPU was just about to grab the sgi lock then > >> we would guarantee that the CPU would see the new gic_cpu_map value and > >> thus any redirection is not necessary. > > OK I get it now. > > > >> I hoped that the commit text explained this. > > I'm possibly not bright enough to get it the first time. > > > >> Honestly it probably isn't a noticeable performance boost either way > >> but I think this is the best we can do. > > Sure, agreed. > > > > > > > > Ok, so which patch is preferred? I'd say the later. Nicolas -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
