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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
* Copyright (c) 2024 David Vernet <dvernet@meta.com>
* Copyright (c) 2024 Tejun Heo <tj@kernel.org>
*/
#include <scx/common.bpf.h>
char _license[] SEC("license") = "GPL";
UEI_DEFINE(uei);
s32 BPF_STRUCT_OPS(ddsp_bogus_dsq_fail_select_cpu, struct task_struct *p,
s32 prev_cpu, u64 wake_flags)
{
s32 cpu = scx_bpf_pick_idle_cpu(p->cpus_ptr, 0);
if (cpu >= 0) {
/*
* If we dispatch to a bogus DSQ that will fall back to the
* builtin global DSQ, we fail gracefully.
*/
scx_bpf_dispatch_vtime(p, 0xcafef00d, SCX_SLICE_DFL,
p->scx.dsq_vtime, 0);
return cpu;
}
return prev_cpu;
}
void BPF_STRUCT_OPS(ddsp_bogus_dsq_fail_exit, struct scx_exit_info *ei)
{
UEI_RECORD(uei, ei);
}
SEC(".struct_ops.link")
struct sched_ext_ops ddsp_bogus_dsq_fail_ops = {
.select_cpu = ddsp_bogus_dsq_fail_select_cpu,
.exit = ddsp_bogus_dsq_fail_exit,
.name = "ddsp_bogus_dsq_fail",
.timeout_ms = 1000U,
};
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