Hello. On Sat, May 21, 2022 at 01:02:00AM +0800, shisiyuan <shisiyuan19870131@xxxxxxxxx> wrote: > In function cgroup_migrate_add_src(), if dst_cgrp > equals to src_cgroup which the tasks link, dont > go on migrating tasks to another css_set. Do you have an example which operations lead to this situation? > This can save the cost of unnecessary migration. How much are the savings visible? (Note, I suspect the shortcut on `src_cgrp == dst_cgrp` might not be always correct when called from cgroup_update_dfl_csses() but not 100% sure now.) Thanks, Michal
