On 04/03/2026 03:58, Waiman Long wrote:
...
It looks that -EBUSY was returned when the script tries to online/
offline a CPU. I ran a simple script to repetitively doing offline/
online operation and couldn't reproduce the problem. I don't have access
to the tegra board that you use for testing. Would you mind trying out
the following patch to see if it can get rid of the problem.
Thanks,
Longman
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index e200de7c60b6..5a5953fb391c 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -3936,8 +3936,10 @@ static void cpuset_handle_hotplug(void)
* previously queued work. Since hk_sd_workfn() doesn't use the
work
* item at all, this is not a problem.
*/
- if (update_housekeeping || force_sd_rebuild)
- queue_work(system_unbound_wq, &hk_sd_work);
+ if (force_sd_rebuild)
+ rebuild_sched_domains_cpuslocked();
+ if (update_housekeeping)
+ queue_work(system_dfl_wq, &hk_sd_work);
free_tmpmasks(ptmp);
}
Yes that did the trick. Works for me. Feel free to add my ...
Tested-by: Jon Hunter <[email protected]>
Thanks
Jon
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nvpublic
