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| author |   Andrea Righi <arighi@nvidia.com> | 2025-01-06 18:03:09 +0100 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2025-01-06 08:56:00 -1000 |
| commit | e4975ac5353395978a7dc49a656adbe6ef9ad063 (patch) | |
| tree | 511e9aec7c65be78677cd3ac961a046abd8ebd5c | |
| parent | sched_ext: idle: small CPU iteration refactoring (diff) | |
| download | wireguard-linux-e4975ac5353395978a7dc49a656adbe6ef9ad063.tar.xz wireguard-linux-e4975ac5353395978a7dc49a656adbe6ef9ad063.zip | |
sched_ext: update scx_bpf_dsq_insert() doc for SCX_DSQ_LOCAL_ON
With commit 5b26f7b920f7 ("sched_ext: Allow SCX_DSQ_LOCAL_ON for direct
dispatches"), scx_bpf_dsq_insert() can use SCX_DSQ_LOCAL_ON for direct
dispatch from ops.enqueue() to target the local DSQ of any CPU.
Update the documentation accordingly.
Fixes: 5b26f7b920f7 ("sched_ext: Allow SCX_DSQ_LOCAL_ON for direct dispatches")
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | Documentation/scheduler/sched-ext.rst | 6 | ||||
| -rw-r--r-- | kernel/sched/ext.c | 4 |
2 files changed, 4 insertions, 6 deletions
diff --git a/Documentation/scheduler/sched-ext.rst b/Documentation/scheduler/sched-ext.rst index 6cb8b676ce03..a8ceaad63b6a 100644 --- a/Documentation/scheduler/sched-ext.rst +++ b/Documentation/scheduler/sched-ext.rst @@ -242,9 +242,9 @@ The following briefly shows how a waking task is scheduled and executed. task was inserted directly from ``ops.select_cpu()``). ``ops.enqueue()`` can make one of the following decisions: - * Immediately insert the task into either the global or local DSQ by - calling ``scx_bpf_dsq_insert()`` with ``SCX_DSQ_GLOBAL`` or - ``SCX_DSQ_LOCAL``, respectively. + * Immediately insert the task into either the global or a local DSQ by + calling ``scx_bpf_dsq_insert()`` with one of the following options: + ``SCX_DSQ_GLOBAL``, ``SCX_DSQ_LOCAL``, or ``SCX_DSQ_LOCAL_ON | cpu``. * Immediately insert the task into a custom DSQ by calling ``scx_bpf_dsq_insert()`` with a DSQ ID which is smaller than 2^63. diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 0ce116e0f67c..f408aa5d1efc 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -6406,9 +6406,7 @@ __bpf_kfunc_start_defs(); * ops.select_cpu(), and ops.dispatch(). * * When called from ops.select_cpu() or ops.enqueue(), it's for direct dispatch - * and @p must match the task being enqueued. Also, %SCX_DSQ_LOCAL_ON can't be - * used to target the local DSQ of a CPU other than the enqueueing one. Use - * ops.select_cpu() to be on the target CPU in the first place. + * and @p must match the task being enqueued. * * When called from ops.select_cpu(), @enq_flags and @dsp_id are stored, and @p * will be directly inserted into the corresponding dispatch queue after |