On 08/17/2018 11:59 AM, Tejun Heo wrote: > Hello, Waiman. > > On Mon, Aug 13, 2018 at 01:56:15PM -0400, Waiman Long wrote: >> The following restrictions are still imposed on a partition root wrt >> allowable changes in cpuset.cpus: >> 1) cpuset.cpus cannot be set to "". There must be at least 1 cpu there. >> 2) Adding cpus that are not in parent's cpuset.cpus (as well as >> cpuset.cpus.effective) or that will take all the parent's effective cpus >> away is not allowed. >> >> So are these limitations acceptable? >> >> The easiest way to remove those restrictions is to forcefully turn off >> the cpuset.sched.partition flag in the cpuset as well as any >> sub-partitions when the user try to do that. With that change, there >> will be no more new restriction on what you can do on cpuset.cpus. > I think that'd be the right thing to do. That's what we do with > cpuset.cpus and cpuset.mems too. If there's nothing available, we > ignore the config and show the settings which are currently in effect. > > Thanks. > Thanks! I will send out an updated patch after the 4.19 merge window closes. -Longman
