Commit 7f5fcd47 authored Mar 06, 2026 by Tejun Heo

sched_ext: Add scx_sched back pointer to scx_sched_pcpu



Add a back pointer from scx_sched_pcpu to scx_sched. This will be used by
the next patch to make scx_bpf_reenqueue_local() sub-sched aware.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Andrea Righi <arighi@nvidia.com>

parent 337ec00b

kernel/sched/ext.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -5655,6 +5655,9 @@ static struct scx_sched scx_alloc_and_add_sched(struct sched_ext_ops ops,
		for_each_possible_cpu(cpu)
		init_dsq(bypass_dsq(sch, cpu), SCX_DSQ_BYPASS, sch);

		for_each_possible_cpu(cpu)
		per_cpu_ptr(sch->pcpu, cpu)->sch = sch;

		sch->helper = kthread_run_worker(0, "sched_ext_helper");
		if (IS_ERR(sch->helper)) {
		ret = PTR_ERR(sch->helper);

kernel/sched/ext_internal.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -933,6 +933,8 @@ struct scx_event_stats {
		s64 SCX_EV_SUB_BYPASS_DISPATCH;
		};

		struct scx_sched;

		enum scx_sched_pcpu_flags {
		SCX_SCHED_PCPU_BYPASSING = 1LLU << 0,
		};
		@@ -953,6 +955,7 @@ struct scx_dsp_ctx {
		};

		struct scx_sched_pcpu {
		struct scx_sched *sch;
		u64 flags; /* protected by rq lock */

		/*