Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
sched_ext/tools: Add compat wrapper for scx_bpf_task_set_slice/dsq_vtime()
for sub-scheduler authority checks. Add compat wrappers which fall back to
direct p->scx field writes on older kernels.
Suggested-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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-2
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tools/sched_ext/include/scx/common.bpf.h
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tools/sched_ext/include/scx/common.bpf.h
···
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s32 scx_bpf_pick_any_cpu(const cpumask_t *cpus_allowed, u64 flags) __ksym;
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bool scx_bpf_task_running(const struct task_struct *p) __ksym;
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s32 scx_bpf_task_cpu(const struct task_struct *p) __ksym;
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bool scx_bpf_task_set_slice(struct task_struct *p, u64 slice) __ksym __weak;
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bool scx_bpf_task_set_dsq_vtime(struct task_struct *p, u64 vtime) __ksym __weak;
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struct rq *scx_bpf_cpu_rq(s32 cpu) __ksym;
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struct rq *scx_bpf_locked_rq(void) __ksym;
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struct task_struct *scx_bpf_cpu_curr(s32 cpu) __ksym __weak;
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tools/sched_ext/include/scx/compat.bpf.h
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tools/sched_ext/include/scx/compat.bpf.h
···
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}
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/*
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* v6.19: scx_bpf_task_set_slice() and scx_bpf_task_set_dsq_vtime() added to for
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* sub-sched authority checks. Drop the wrappers and move the decls to
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* common.bpf.h after v6.22.
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*/
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bool scx_bpf_task_set_slice___new(struct task_struct *p, u64 slice) __ksym __weak;
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bool scx_bpf_task_set_dsq_vtime___new(struct task_struct *p, u64 vtime) __ksym __weak;
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static inline void scx_bpf_task_set_slice(struct task_struct *p, u64 slice)
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{
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if (bpf_ksym_exists(scx_bpf_task_set_slice___new))
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scx_bpf_task_set_slice___new(p, slice);
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else
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p->scx.slice = slice;
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}
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static inline void scx_bpf_task_set_dsq_vtime(struct task_struct *p, u64 vtime)
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{
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if (bpf_ksym_exists(scx_bpf_task_set_dsq_vtime___new))
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scx_bpf_task_set_dsq_vtime___new(p, vtime);
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else
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p->scx.dsq_vtime = vtime;
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}
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/*
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* Define sched_ext_ops. This may be expanded to define multiple variants for
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* backward compatibility. See compat.h::SCX_OPS_LOAD/ATTACH().
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*/