Re: [RFC PATCH bpf-next v5 2/2] bpf: Call rcu_momentary_dyntick_idle() in task work periodically

[Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx>]

On Mon, Jun 19, 2023 at 7:00 AM Hou Tao <houtao@xxxxxxxxxxxxxxx> wrote:
>
> +static void bpf_rcu_gp_acc_work(struct callback_head *head)
> +{
> +       struct bpf_rcu_gp_acc_ctx *ctx = container_of(head, struct bpf_rcu_gp_acc_ctx, work);
> +
> +       local_irq_disable();
> +       rcu_momentary_dyntick_idle();
> +       local_irq_enable();

We discussed this with Paul off-line and decided to go a different route.
Paul prepared a patch for us to expose rcu_request_urgent_qs_task().
I'll be sending the series later this week.