On Wed, Jun 03, 2015 at 08:40:51AM +0900, Hiraku Toyooka wrote: > Hello, Russell, > > On 2015/06/02 17:38, Russell King - ARM Linux wrote: > > I wasn't thinking of SPIs and PPIs, but SGIs - the IPI interrupts coming > > from the boot CPU. > > All tasks in a CPU going offline are migrated to other CPUs(finally > CPU0) and the rq is marked with offline before the CPU entering WFI > loop. So IPI is not sent to the secondary CPU. > > > If you have a way to reset CPU0, why are you not using this for hotplug > > when a CPU is hot-unplugged? > > I think you mean "way to reset CPU1". If so, the reason is an increase > in power consumption in usual hotplug. This is discussed before between > Alan Tull and you. (https://lkml.org/lkml/2014/9/25/37)
Please put a comment in your hotplug code describing this, so I'm not likely to ask again (and I don't have to remember that I've asked the question.) Thanks. -- FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
