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Merge tag 'sched_ext-for-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext

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Pull sched_ext updates from Tejun Heo:

 - Add support for cgroup "cpu.max" interface

 - Code organization cleanup so that ext_idle.c doesn't depend on the
   source-file-inclusion build method of sched/

 - Drop UP paths in accordance with sched core changes

 - Documentation and other misc changes

* tag 'sched_ext-for-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext:
  sched_ext: Fix scx_bpf_reenqueue_local() reference
  sched_ext: Drop kfuncs marked for removal in 6.15
  sched_ext, rcu: Eject BPF scheduler on RCU CPU stall panic
  kernel/sched/ext.c: fix typo "occured" -> "occurred" in comments
  sched_ext: Add support for cgroup bandwidth control interface
  sched_ext, sched/core: Factor out struct scx_task_group
  sched_ext: Return NULL in llc_span
  sched_ext: Always use SMP versions in kernel/sched/ext_idle.h
  sched_ext: Always use SMP versions in kernel/sched/ext_idle.c
  sched_ext: Always use SMP versions in kernel/sched/ext.h
  sched_ext: Always use SMP versions in kernel/sched/ext.c
  sched_ext: Documentation: Clarify time slice handling in task lifecycle
  sched_ext: Make scx_locked_rq() inline
  sched_ext: Make scx_rq_bypassing() inline
  sched_ext: idle: Make local functions static in ext_idle.c
  sched_ext: idle: Remove unnecessary ifdef in scx_bpf_cpu_node()
This commit is contained in:
Linus Torvalds
2025-07-31 16:29:46 -07:00
parent 6aee5aed2e ae96bba1ca
commit 6a68cec16b
12 changed files with 241 additions and 198 deletions
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11
Documentation/scheduler/sched-ext.rst
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@@ -313,16 +313,21 @@ by a sched_ext scheduler:
ops.runnable(); /* Task becomes ready to run */
while (task is runnable) {
if (task is not in a DSQ) {
if (task is not in a DSQ && task->scx.slice == 0) {
ops.enqueue(); /* Task can be added to a DSQ */
/* A CPU becomes available */
/* Any usable CPU becomes available */
ops.dispatch(); /* Task is moved to a local DSQ */
}
ops.running(); /* Task starts running on its assigned CPU */
ops.tick(); /* Called every 1/HZ seconds */
while (task->scx.slice > 0 && task is runnable)
ops.tick(); /* Called every 1/HZ seconds */
ops.stopping(); /* Task stops running (time slice expires or wait) */
/* Task's CPU becomes available */
ops.dispatch(); /* task->scx.slice can be refilled */
}
ops.quiescent(); /* Task releases its assigned CPU (wait) */