Messages in this thread | | | Date | Thu, 16 Dec 2021 10:28:37 +0100 | From | Michal Koutný <> | Subject | Re: [PATCH v9 3/7] cgroup/cpuset: Refining features and constraints of a partition |
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On Wed, Dec 15, 2021 at 11:29:41AM -0500, Waiman Long <longman@redhat.com> wrote: > There are additional checks for the member to partition transition which > requires that the target cpuset shouldn't have child cpuset.
Ah, I forgot the transition condition no. 4 will apply here. Clear.
So, currently full bottom up + top down walk is needed in (rare?) case the switch from root partition to member and back.
> That prevents the recovering of a invalid partition root under a > member cpuset. We could certainly remove that restriction by adding > additional code as well as additional tests to verify it works. I > haven't done that simply to avoid adding more complexity to the > current code.
I agree this restriction can be lifted later independently when the rest settles. (It's not so different from controllers disabling on the unified hierarchy after all.)
Thanks, Michal
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