On Thu, Feb 04, 2021 at 01:01:57AM +0000, Alexey Klimov wrote: > @@ -1281,6 +1282,11 @@ static int cpu_up(unsigned int cpu, enum cpuhp_state target) > err = _cpu_up(cpu, 0, target); > out: > cpu_maps_update_done(); > + > + /* To avoid out of line uevent */ > + if (!err) > + cpuset_wait_for_hotplug(); > + > return err; > } > > @@ -2071,14 +2075,18 @@ static void cpuhp_online_cpu_device(unsigned int cpu) > struct device *dev = get_cpu_device(cpu); > > dev->offline = false; > - /* Tell user space about the state change */ > - kobject_uevent(&dev->kobj, KOBJ_ONLINE); > } > One concequence of this is that you'll now get a bunch of notifications across things like suspend/hybernate.
