Just rebased on Linus's master and made adjustments. These patches have been complete for some time without any issues. I am hoping they are merged for 6.18. sched_ext tasks currently are starved by RT hoggers especially since RT throttling was replaced by deadline servers to boost only CFS tasks. Several users in the community have reported issues with RT stalling sched_ext tasks. Add a sched_ext deadline server as well so that sched_ext tasks are also boosted and do not suffer starvation. 2 kselftest are provided to verify the starvation fixes and bandwidth allocation is looking correct. Previous series: https://lore.kernel.org/all/20250702232944.3221001-1-joelagnelf@xxxxxxxxxx/ Andrea Righi (4): sched/deadline: Add support to remove DL server's bandwidth contribution sched/deadline: Account ext server bandwidth sched/deadline: Allow to initialize DL server when needed selftests/sched_ext: Add test for sched_ext dl_server Joel Fernandes (11): sched/debug: Fix updating of ppos on server write ops sched/debug: Stop and start server based on if it was active sched/deadline: Clear the defer params sched/deadline: Return EBUSY if dl_bw_cpus is zero sched: Add support to pick functions to take rf sched: Add a server arg to dl_server_update_idle_time() sched_ext: Add a DL server for sched_ext tasks sched/debug: Add support to change sched_ext server params sched_ext: Selectively enable ext and fair DL servers sched/deadline: Fix DL server crash in inactive_timer callback selftests/sched_ext: Add test for DL server total_bw consistency include/linux/sched.h | 2 +- kernel/sched/core.c | 19 +- kernel/sched/deadline.c | 144 +++++++-- kernel/sched/debug.c | 161 ++++++++-- kernel/sched/ext.c | 161 +++++++++- kernel/sched/fair.c | 15 +- kernel/sched/idle.c | 4 +- kernel/sched/rt.c | 2 +- kernel/sched/sched.h | 17 +- kernel/sched/stop_task.c | 2 +- kernel/sched/topology.c | 5 + tools/testing/selftests/sched_ext/Makefile | 2 + .../selftests/sched_ext/rt_stall.bpf.c | 23 ++ tools/testing/selftests/sched_ext/rt_stall.c | 213 +++++++++++++ tools/testing/selftests/sched_ext/total_bw.c | 282 ++++++++++++++++++ 15 files changed, 955 insertions(+), 97 deletions(-) create mode 100644 tools/testing/selftests/sched_ext/rt_stall.bpf.c create mode 100644 tools/testing/selftests/sched_ext/rt_stall.c create mode 100644 tools/testing/selftests/sched_ext/total_bw.c -- 2.34.1
