linux-kernel - [GIT PULL] sched_ext: Fixes for v6.12-rc3

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Message-ID: <Zw7Syx6dUES0a_R5@slm.duckdns.org>
Date: Tue, 15 Oct 2024 10:38:35 -1000
From: Tejun Heo <tj@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, sched-ext@...a.com,
	David Vernet <void@...ifault.com>
Subject: [GIT PULL] sched_ext: Fixes for v6.12-rc3

The following changes since commit e0ed52154e866a1e9e9b97ded50b164698f0a222:

  sched_ext: Documentation: Update instructions for running example schedulers (2024-10-08 08:49:18 -1000)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext.git/ tags/sched_ext-for-6.12-rc3-fixes

for you to fetch changes up to 60e339be100d7d49e13616bd8b4b1b864f0a64a0:

  sched_ext: Remove unnecessary cpu_relax() (2024-10-14 13:23:49 -1000)

----------------------------------------------------------------
sched_ext: Fixes for v6.12-rc3

- More issues reported in the enable/disable paths on large machines with
  many tasks due to scx_tasks_lock being held too long. Break up the task
  iterations.

- Remove ops.select_cpu() dependency in bypass mode so that a misbehaving
  implementation can't live-lock the machine by pushing all tasks to few
  CPUs in bypass mode.

- Other misc fixes.

----------------------------------------------------------------
Björn Töpel (1):
      selftests: sched_ext: Add sched_ext as proper selftest target

David Vernet (1):
      sched_ext: Remove unnecessary cpu_relax()

Honglei Wang (1):
      sched_ext: use correct function name in pick_task_scx() warning message

Tejun Heo (6):
      Revert "sched_ext: Use shorter slice while bypassing"
      sched_ext: Start schedulers with consistent p->scx.slice values
      sched_ext: Move scx_buildin_idle_enabled check to scx_bpf_select_cpu_dfl()
      sched_ext: bypass mode shouldn't depend on ops.select_cpu()
      sched_ext: Move scx_tasks_lock handling into scx_task_iter helpers
      sched_ext: Don't hold scx_tasks_lock for too long

 kernel/sched/ext.c                         | 186 ++++++++++++++++-------------
 tools/testing/selftests/Makefile           |   9 +-
 tools/testing/selftests/sched_ext/Makefile |  71 +++++------
 3 files changed, 138 insertions(+), 128 deletions(-)

-- 
tejun