Le Thu, Jun 25, 2026 at 01:27:54AM -0400, Waiman Long a écrit : > On 6/24/26 2:34 AM, Jing Wu wrote: > > 3. Are there specific patches in your series where you would welcome > > our contribution directly? > > I have broken down the shutdown callback into separate portions as suggested > by Thomas. The other major change that I am working on is to try to shutdown > to only CPUHP_AP_OFFLINE state instead of all the way down to CPUHP_OFFLINE.
What was the reason for that already? Can we perhaps ask the user to offline the target CPUs before toggling isolation on them? > That will require some adjustments to the nohz_full related hotplug > functions. I have some ideas of what needs to be done. However, I haven't > looked into RCU yet. I know RCU support changing the nocb mask for fully > offline CPUs, I will need to find out if it possible to do that for > partially offline CPUs. No because callbacks can still be enqueued at this stage. But we could manage to make it work with CPUHP_AP_IDLE_DEAD. Thanks. -- Frederic Weisbecker SUSE Labs
