Re: [PATCH RFC] cpuset: Make cpusets get restored on hotplug

[Tejun Heo]

On Thu, Mar 26, 2020 at 03:44:48PM -0400, Joel Fernandes wrote:
> It is not really that big a change. Please go over the patch, we are not
> changing anything with how ->cpus_allowed works and interacts with the rest
> of the system and the scheduler. We have just introduced a new mask to keep
> track of which CPUs were requested without them being affected by hotplug. On
> CPU onlining, we restore the state of ->cpus_allowed as not be affected by
> hotplug.

It's not the code. It's the behavior. I'm not flipping the behavior for
the existing cgroup1 users underneath them at this point. As-is, it's a
hard nack. If you really really really want it, put it behind a mount
option.

-- 
tejun