linux-kernel - [GIT PULL] sched_ext: Fixes for v6.14-rc2

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Message-ID: <Z696A62FFj_UkApm@slm.duckdns.org>
Date: Fri, 14 Feb 2025 07:14:43 -1000
From: Tejun Heo <tj@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, David Vernet <void@...ifault.com>,
	Andrea Righi <arighi@...dia.com>,
	Changwoo Min <changwoo@...lia.com>
Subject: [GIT PULL] sched_ext: Fixes for v6.14-rc2

The following changes since commit ab18b8fff124c9b76ea12692571ca822dcd92854:

  Merge tag 'auxdisplay-v6.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-auxdisplay (2025-01-24 08:03:52 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext.git/ tags/sched_ext-for-6.14-rc2-fixes

for you to fetch changes up to f5717c93a1b999970f3a64d771a1a9ee68cc37d0:

  sched_ext: Use SCX_CALL_OP_TASK in task_tick_scx (2025-02-13 06:57:33 -1000)

----------------------------------------------------------------
sched_ext: Fixes for v6.14-rc2

- Fix lock imbalance in a corner case of dispatch_to_local_dsq().

- Migration disabled tasks were confusing some BPF schedulers and its
  handling had a bug. Fix it and simplify the default behavior by
  dispatching them automatically.

- ops.tick(), ops.disable() and ops.exit_task() were incorrectly disallowing
  kfuncs that require the task argument to be the rq operation is currently
  operating on and thus is rq-locked. Allow them.

- Fix autogroup migration handling bug which was occasionally triggering a
  warning in the cgroup migration path.

- tools/sched_ext, selftest and other misc updates.

----------------------------------------------------------------
Andrea Righi (5):
      sched_ext: Include task weight in the error state dump
      selftests/sched_ext: Fix enum resolution
      tools/sched_ext: Add helper to check task migration state
      sched_ext: selftests/dsp_local_on: Fix selftest on UP systems
      sched_ext: Fix lock imbalance in dispatch_to_local_dsq()

Atul Kumar Pant (1):
      sched_ext: Fixes typos in comments

Changwoo Min (1):
      sched_ext: Fix incorrect time delta calculation in time_delta()

Chuyi Zhou (2):
      sched_ext: Fix the incorrect bpf_list kfunc API in common.bpf.h.
      sched_ext: Use SCX_CALL_OP_TASK in task_tick_scx

Devaansh Kumar (1):
      sched_ext: selftests: Fix grammar in tests description

Tejun Heo (5):
      sched_ext: selftests/dsp_local_on: Fix sporadic failures
      sched_ext: Fix incorrect autogroup migration detection
      sched_ext: Implement auto local dispatching of migration disabled tasks
      sched_ext: Fix migration disabled handling in targeted dispatches
      sched_ext: Fix incorrect assumption about migration disabled tasks in task_can_run_on_remote_rq()

 kernel/sched/autogroup.c                           |   4 +-
 kernel/sched/core.c                                |   7 +-
 kernel/sched/ext.c                                 | 113 ++++++++++++++-------
 kernel/sched/ext.h                                 |   4 +-
 kernel/sched/sched.h                               |   2 +-
 tools/sched_ext/include/scx/common.bpf.h           |  25 ++++-
 tools/testing/selftests/sched_ext/create_dsq.c     |  10 +-
 .../selftests/sched_ext/ddsp_bogus_dsq_fail.c      |   7 +-
 .../selftests/sched_ext/ddsp_vtimelocal_fail.c     |   7 +-
 .../testing/selftests/sched_ext/dsp_local_on.bpf.c |   2 +-
 tools/testing/selftests/sched_ext/dsp_local_on.c   |   1 +
 .../selftests/sched_ext/enq_last_no_enq_fails.c    |  10 +-
 .../selftests/sched_ext/enq_select_cpu_fails.c     |  10 +-
 tools/testing/selftests/sched_ext/exit.c           |   1 +
 tools/testing/selftests/sched_ext/hotplug.c        |   6 +-
 .../selftests/sched_ext/init_enable_count.c        |  27 ++---
 tools/testing/selftests/sched_ext/maximal.c        |   7 +-
 tools/testing/selftests/sched_ext/maybe_null.c     |   2 +-
 tools/testing/selftests/sched_ext/minimal.c        |  10 +-
 tools/testing/selftests/sched_ext/prog_run.c       |  10 +-
 tools/testing/selftests/sched_ext/reload_loop.c    |   9 +-
 tools/testing/selftests/sched_ext/select_cpu_dfl.c |   7 +-
 .../sched_ext/select_cpu_dfl_nodispatch.c          |   7 +-
 .../selftests/sched_ext/select_cpu_dispatch.c      |   7 +-
 .../sched_ext/select_cpu_dispatch_bad_dsq.c        |   7 +-
 .../sched_ext/select_cpu_dispatch_dbl_dsp.c        |   7 +-
 .../testing/selftests/sched_ext/select_cpu_vtime.c |   7 +-
 27 files changed, 198 insertions(+), 118 deletions(-)

-- 
tejun