Commits on Mar 19, 2024

1. scx: Improve error behavior when p->scx.cgrp_moving_from is unexpecte… …

   …dly NULL
   
   Make the sanity check a bit more concise and ensure that ops.cgroup_move()
   is never called with NULL source cgroup.
   
   (cherry picked from commit 6d5da8c)

   

   htejun committed Mar 19, 2024
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2. scx: Fix ops.cgroup_move() not being called on a task which went thro… …

   …ugh ops.cgroup_prep_move()
   
   sched_move_task() takes an early exit if the source and destination are
   identical. This triggers the warning in scx_cgroup_can_attach() as it leaves
   p->scx.cgrp_moving_from uncleared.
   
   Update the cgroup migration path so that ops.cgroup_prep_move() is skipped
   for identity migrations so that its invocations always match
   ops.cgroup_move() one-to-one.
   
   (cherry picked from commit d439866)

   

   htejun committed Mar 19, 2024
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