Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 28 Jul 2022 16:44:26 +0200 | From | Michal Koutný <> | Subject | Re: [PATCH 2/2] cgroup: Skip subtree root in cgroup_update_dfl_csses() |
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On Wed, Jul 27, 2022 at 08:58:15PM -0400, Waiman Long <longman@redhat.com> wrote: > The cgroup_update_dfl_csses() function updates css associations when a > cgroup's subtree_control file is modified. Any changes made to a cgroup's > subtree_control file, however, will only affect its descendants but not > the cgroup itself.
I find this correct.
> So there is no point in migrating csses associated with that cgroup. > We can skip them instead.
Alone it's not such a big win but it componds with the recent Tejun's threadgroup_rwsem elision.
> --- > kernel/cgroup/cgroup.c | 9 +++++++++ > 1 file changed, 9 insertions(+)
Feel free to have Reviewed-by: Michal Koutný <mkoutny@suse.com>
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