[PATCH v5 0/4] Fix some warnings about rq clock

[Hao Jia]

These four patches fix some warnings about rq clock.

Patch1 fixes the warning of using the old rq clock caused by
missing update rq clock.

Patch2-4 fixes the warning that the rq clock was updated multiple
times while holding the rq lock.

v4->v5:
    - Benjamin Segall suggested adding update_rq_clock() to set_rq_offline()
      instead of calling update_rq_clock() before set_rq_offline() runs.

v3->v4:
    - Add Reviewed-by: Vincent Guittot <vincent.guittot@xxxxxxxxxx> for
      all patches.

v2->v3:
    - Modify the commit information of patch1 to make the description clearer.
    - Split v2 patch2 into 3 separate patches.

v1->v2:
    - Vincent Guittot suggested using rq_clock_start_loop_update()
      to prevent multiple calls to update_rq_clock() in unthrottle_cfs_rq()
      instead of removing update_rq_clock() from unthrottle_cfs_rq()
      and updating the rq clock before unthrottle_cfs_rq() for patch2.

[v4] https://lore.kernel.org/all/20230608063312.79440-1-jiahao.os@xxxxxxxxxxxxx
[v3] https://lore.kernel.org/all/20230515063848.77947-1-jiahao.os@xxxxxxxxxxxxx
[v2] https://lore.kernel.org/all/20230510083450.62334-1-jiahao.os@xxxxxxxxxxxxx
[v1] https://lore.kernel.org/all/20230410081206.23441-1-jiahao.os@xxxxxxxxxxxxx


Hao Jia (4):
  sched/core: Fixed missing rq clock update before calling
    set_rq_offline()
  sched/core: Avoid double calling update_rq_clock() in
    __balance_push_cpu_stop()
  sched/core: Avoid multiple calling update_rq_clock() in
    __cfsb_csd_unthrottle()
  sched/core: Avoid multiple calling update_rq_clock() in
    unthrottle_offline_cfs_rqs()

 kernel/sched/core.c     |  9 +++++----
 kernel/sched/fair.c     | 18 ++++++++++++++++++
 kernel/sched/sched.h    | 21 +++++++++++++++++++++
 kernel/sched/topology.c |  6 +++---
 4 files changed, 47 insertions(+), 7 deletions(-)

-- 
2.20.1