On Thu, 24 Sep 2020 10:34:14 +0200 pet...@infradead.org wrote: > On Wed, Sep 23, 2020 at 04:37:44PM -0700, Prasad Sodagudi wrote: > > There are all changes related to cpu hotplug path and would like to seek > > upstream review. These are all patches in Qualcomm downstream kernel > > for a quite long time. First patch sets the rt prioity to hotplug > > task and second patch adds cpuhp trace events. > > > > 1) cpu-hotplug: Always use real time scheduling when hotplugging a CPU > > 2) cpu/hotplug: Add cpuhp_latency trace event > > Why? Hotplug is a known super slow path. If you care about hotplug > latency you're doing it wrong.
I'd like to know the answer to Peter's question too. Why? -- Steve
