Re: [PATCH v3 08/13] sched: Export hidden tracepoints to modules

Phil Auld
2025-12-05T13:36:05Z

On Fri, Dec 05, 2025 at 02:16:16PM +0100 Gabriele Monaco wrote:
> The tracepoints sched_entry, sched_exit and sched_set_need_resched
> are not exported to tracefs as trace events, this allows only kernel
> code to access them. Helper modules like [1] can be used to still have
> the tracepoints available to ftrace for debugging purposes, but they do
> rely on the tracepoints being exported.
>
> Export the 3 not exported tracepoints.
> Note that sched_set_state is already exported as the macro is called
> from modules.
>
> [1] - https://github.com/qais-yousef/sched_tp.git
>
> Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>

This makes sense.

Reviewed-by: Phil Auld <pauld@redhat.com>

Cheers,
Phil

> ---
> kernel/sched/core.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index 41ba0be16911..5516778c19eb 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -119,6 +119,9 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(sched_util_est_cfs_tp);
> EXPORT_TRACEPOINT_SYMBOL_GPL(sched_util_est_se_tp);
> EXPORT_TRACEPOINT_SYMBOL_GPL(sched_update_nr_running_tp);
> EXPORT_TRACEPOINT_SYMBOL_GPL(sched_compute_energy_tp);
> +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_entry_tp);
> +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_exit_tp);
> +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_set_need_resched_tp);
>
> DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues);
> DEFINE_PER_CPU(struct rnd_state, sched_rnd_state);
> --
> 2.52.0
>
>

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