[PATCH 6.12.y 0/3] backport missing dependencies of d66792919d4f

Commit d66792919d4f ("sched/deadline: Use revised wakeup rule for
dl_server") in the 6.12.y stable tree (upstream commit 14a857056466)
depends on three upstream commits that were not backported:

  commit cccb45d7c429 ("sched/deadline: Less agressive dl_server handling")
  commit 4ae8d9aa9f9d ("sched/deadline: Fix dl_server getting stuck")
  commit a3a70caf7906 ("sched/deadline: Fix dl_server behaviour")

Without these, cyclictest under load reports latencies up to ~50ms on 
PREEMPT_RT.

For context, see the regression report:
https://lore.kernel.org/regressions/[email protected]

Testing:
Tested on two different machines with Debian's PREEMPT_RT config for about 
10 hours.
Without these patches cyclictest under load spikes to ~50ms in less than 
30 minutes, with the series applied the latency spikes are gone.

Thanks,
Lukas

Peter Zijlstra (3):
  sched/deadline: Less agressive dl_server handling
  sched/deadline: Fix dl_server getting stuck
  sched/deadline: Fix dl_server behaviour

 include/linux/sched.h   |  1 -
 kernel/sched/deadline.c | 16 +++-------------
 kernel/sched/fair.c     | 16 +---------------
 kernel/sched/sched.h    | 37 +++++++++++++++++++++++++++++++------
 4 files changed, 35 insertions(+), 35 deletions(-)

-- 
2.54.0