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| author | Mark Brown <broonie@kernel.org> | 2026-05-29 23:00:10 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2026-05-29 23:00:10 +0100 |
| commit | e8b79e654b43e511a9ff0af1963f86718564c7d6 (patch) | |
| tree | 716d1d18f145b89bd61f852ef7ac0b94914f6e5a /Documentation | |
| parent | 8d353be232212e7e9a53c582d6cbc9570ad24ab8 (diff) | |
| parent | 1c24a913b8ebd4e7ef86e1259f3a77b06b4911b9 (diff) | |
| download | linux-next-history-e8b79e654b43e511a9ff0af1963f86718564c7d6.tar.gz | |
Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext.git
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/scheduler/sched-ext.rst | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/Documentation/scheduler/sched-ext.rst b/Documentation/scheduler/sched-ext.rst index 03d595d178ea4..c4f59c08d8a4f 100644 --- a/Documentation/scheduler/sched-ext.rst +++ b/Documentation/scheduler/sched-ext.rst @@ -339,6 +339,11 @@ The following briefly shows how a waking task is scheduled and executed. leaves (e.g., when ``ops.dispatch()`` moves it to a terminal DSQ, or on property change / sleep). + Note that ``ops.enqueue()`` can be called multiple times in a row without + an intervening call to ``ops.dequeue()``. This can happen, for example, + when a task on a user-created DSQ is re-enqueued using + ``scx_bpf_dsq_reenq()``. The task stays in BPF custody the entire time. + When a task leaves BPF scheduler custody, ``ops.dequeue()`` is invoked. The dequeue can happen for different reasons, distinguished by flags: @@ -503,7 +508,7 @@ Where to Look custom DSQ. * ``scx_qmap[.bpf].c``: A multi-level FIFO scheduler supporting five - levels of priority implemented with ``BPF_MAP_TYPE_QUEUE``. + levels of priority implemented with arena-backed doubly-linked lists. * ``scx_central[.bpf].c``: A central FIFO scheduler where all scheduling decisions are made on one CPU, demonstrating ``LOCAL_ON`` dispatching, |