*/
struct sched_ext_ops {
/**
- * select_cpu - Pick the target CPU for a task which is being woken up
+ * @select_cpu: Pick the target CPU for a task which is being woken up
* @p: task being woken up
* @prev_cpu: the cpu @p was on before sleeping
* @wake_flags: SCX_WAKE_*
s32 (*select_cpu)(struct task_struct *p, s32 prev_cpu, u64 wake_flags);
/**
- * enqueue - Enqueue a task on the BPF scheduler
+ * @enqueue: Enqueue a task on the BPF scheduler
* @p: task being enqueued
* @enq_flags: %SCX_ENQ_*
*
void (*enqueue)(struct task_struct *p, u64 enq_flags);
/**
- * dequeue - Remove a task from the BPF scheduler
+ * @dequeue: Remove a task from the BPF scheduler
* @p: task being dequeued
* @deq_flags: %SCX_DEQ_*
*
void (*dequeue)(struct task_struct *p, u64 deq_flags);
/**
- * dispatch - Dispatch tasks from the BPF scheduler and/or user DSQs
+ * @dispatch: Dispatch tasks from the BPF scheduler and/or user DSQs
* @cpu: CPU to dispatch tasks for
* @prev: previous task being switched out
*
void (*dispatch)(s32 cpu, struct task_struct *prev);
/**
- * tick - Periodic tick
+ * @tick: Periodic tick
* @p: task running currently
*
* This operation is called every 1/HZ seconds on CPUs which are
void (*tick)(struct task_struct *p);
/**
- * runnable - A task is becoming runnable on its associated CPU
+ * @runnable: A task is becoming runnable on its associated CPU
* @p: task becoming runnable
* @enq_flags: %SCX_ENQ_*
*
void (*runnable)(struct task_struct *p, u64 enq_flags);
/**
- * running - A task is starting to run on its associated CPU
+ * @running: A task is starting to run on its associated CPU
* @p: task starting to run
*
* See ->runnable() for explanation on the task state notifiers.
void (*running)(struct task_struct *p);
/**
- * stopping - A task is stopping execution
+ * @stopping: A task is stopping execution
* @p: task stopping to run
* @runnable: is task @p still runnable?
*
void (*stopping)(struct task_struct *p, bool runnable);
/**
- * quiescent - A task is becoming not runnable on its associated CPU
+ * @quiescent: A task is becoming not runnable on its associated CPU
* @p: task becoming not runnable
* @deq_flags: %SCX_DEQ_*
*
void (*quiescent)(struct task_struct *p, u64 deq_flags);
/**
- * yield - Yield CPU
+ * @yield: Yield CPU
* @from: yielding task
* @to: optional yield target task
*
bool (*yield)(struct task_struct *from, struct task_struct *to);
/**
- * core_sched_before - Task ordering for core-sched
+ * @core_sched_before: Task ordering for core-sched
* @a: task A
* @b: task B
*
bool (*core_sched_before)(struct task_struct *a, struct task_struct *b);
/**
- * set_weight - Set task weight
+ * @set_weight: Set task weight
* @p: task to set weight for
* @weight: new weight [1..10000]
*
void (*set_weight)(struct task_struct *p, u32 weight);
/**
- * set_cpumask - Set CPU affinity
+ * @set_cpumask: Set CPU affinity
* @p: task to set CPU affinity for
* @cpumask: cpumask of cpus that @p can run on
*
const struct cpumask *cpumask);
/**
- * update_idle - Update the idle state of a CPU
+ * @update_idle: Update the idle state of a CPU
* @cpu: CPU to udpate the idle state for
* @idle: whether entering or exiting the idle state
*
void (*update_idle)(s32 cpu, bool idle);
/**
- * cpu_acquire - A CPU is becoming available to the BPF scheduler
+ * @cpu_acquire: A CPU is becoming available to the BPF scheduler
* @cpu: The CPU being acquired by the BPF scheduler.
* @args: Acquire arguments, see the struct definition.
*
void (*cpu_acquire)(s32 cpu, struct scx_cpu_acquire_args *args);
/**
- * cpu_release - A CPU is taken away from the BPF scheduler
+ * @cpu_release: A CPU is taken away from the BPF scheduler
* @cpu: The CPU being released by the BPF scheduler.
* @args: Release arguments, see the struct definition.
*
void (*cpu_release)(s32 cpu, struct scx_cpu_release_args *args);
/**
- * init_task - Initialize a task to run in a BPF scheduler
+ * @init_task: Initialize a task to run in a BPF scheduler
* @p: task to initialize for BPF scheduling
* @args: init arguments, see the struct definition
*
s32 (*init_task)(struct task_struct *p, struct scx_init_task_args *args);
/**
- * exit_task - Exit a previously-running task from the system
+ * @exit_task: Exit a previously-running task from the system
* @p: task to exit
+ * @args: exit arguments, see the struct definition
*
* @p is exiting or the BPF scheduler is being unloaded. Perform any
* necessary cleanup for @p.
void (*exit_task)(struct task_struct *p, struct scx_exit_task_args *args);
/**
- * enable - Enable BPF scheduling for a task
+ * @enable: Enable BPF scheduling for a task
* @p: task to enable BPF scheduling for
*
* Enable @p for BPF scheduling. enable() is called on @p any time it
void (*enable)(struct task_struct *p);
/**
- * disable - Disable BPF scheduling for a task
+ * @disable: Disable BPF scheduling for a task
* @p: task to disable BPF scheduling for
*
* @p is exiting, leaving SCX or the BPF scheduler is being unloaded.
void (*disable)(struct task_struct *p);
/**
- * dump - Dump BPF scheduler state on error
+ * @dump: Dump BPF scheduler state on error
* @ctx: debug dump context
*
* Use scx_bpf_dump() to generate BPF scheduler specific debug dump.
void (*dump)(struct scx_dump_ctx *ctx);
/**
- * dump_cpu - Dump BPF scheduler state for a CPU on error
+ * @dump_cpu: Dump BPF scheduler state for a CPU on error
* @ctx: debug dump context
* @cpu: CPU to generate debug dump for
* @idle: @cpu is currently idle without any runnable tasks
void (*dump_cpu)(struct scx_dump_ctx *ctx, s32 cpu, bool idle);
/**
- * dump_task - Dump BPF scheduler state for a runnable task on error
+ * @dump_task: Dump BPF scheduler state for a runnable task on error
* @ctx: debug dump context
* @p: runnable task to generate debug dump for
*
#ifdef CONFIG_EXT_GROUP_SCHED
/**
- * cgroup_init - Initialize a cgroup
+ * @cgroup_init: Initialize a cgroup
* @cgrp: cgroup being initialized
* @args: init arguments, see the struct definition
*
struct scx_cgroup_init_args *args);
/**
- * cgroup_exit - Exit a cgroup
+ * @cgroup_exit: Exit a cgroup
* @cgrp: cgroup being exited
*
* Either the BPF scheduler is being unloaded or @cgrp destroyed, exit
void (*cgroup_exit)(struct cgroup *cgrp);
/**
- * cgroup_prep_move - Prepare a task to be moved to a different cgroup
+ * @cgroup_prep_move: Prepare a task to be moved to a different cgroup
* @p: task being moved
* @from: cgroup @p is being moved from
* @to: cgroup @p is being moved to
struct cgroup *from, struct cgroup *to);
/**
- * cgroup_move - Commit cgroup move
+ * @cgroup_move: Commit cgroup move
* @p: task being moved
* @from: cgroup @p is being moved from
* @to: cgroup @p is being moved to
struct cgroup *from, struct cgroup *to);
/**
- * cgroup_cancel_move - Cancel cgroup move
+ * @cgroup_cancel_move: Cancel cgroup move
* @p: task whose cgroup move is being canceled
* @from: cgroup @p was being moved from
* @to: cgroup @p was being moved to
struct cgroup *from, struct cgroup *to);
/**
- * cgroup_set_weight - A cgroup's weight is being changed
+ * @cgroup_set_weight: A cgroup's weight is being changed
* @cgrp: cgroup whose weight is being updated
* @weight: new weight [1..10000]
*
*/
/**
- * cpu_online - A CPU became online
+ * @cpu_online: A CPU became online
* @cpu: CPU which just came up
*
* @cpu just came online. @cpu will not call ops.enqueue() or
void (*cpu_online)(s32 cpu);
/**
- * cpu_offline - A CPU is going offline
+ * @cpu_offline: A CPU is going offline
* @cpu: CPU which is going offline
*
* @cpu is going offline. @cpu will not call ops.enqueue() or
*/
/**
- * init - Initialize the BPF scheduler
+ * @init: Initialize the BPF scheduler
*/
s32 (*init)(void);
/**
- * exit - Clean up after the BPF scheduler
+ * @exit: Clean up after the BPF scheduler
* @info: Exit info
*
* ops.exit() is also called on ops.init() failure, which is a bit
void (*exit)(struct scx_exit_info *info);
/**
- * dispatch_max_batch - Max nr of tasks that dispatch() can dispatch
+ * @dispatch_max_batch: Max nr of tasks that dispatch() can dispatch
*/
u32 dispatch_max_batch;
/**
- * flags - %SCX_OPS_* flags
+ * @flags: %SCX_OPS_* flags
*/
u64 flags;
/**
- * timeout_ms - The maximum amount of time, in milliseconds, that a
+ * @timeout_ms: The maximum amount of time, in milliseconds, that a
* runnable task should be able to wait before being scheduled. The
* maximum timeout may not exceed the default timeout of 30 seconds.
*
u32 timeout_ms;
/**
- * exit_dump_len - scx_exit_info.dump buffer length. If 0, the default
+ * @exit_dump_len: scx_exit_info.dump buffer length. If 0, the default
* value of 32768 is used.
*/
u32 exit_dump_len;
/**
- * hotplug_seq - A sequence number that may be set by the scheduler to
+ * @hotplug_seq: A sequence number that may be set by the scheduler to
* detect when a hotplug event has occurred during the loading process.
* If 0, no detection occurs. Otherwise, the scheduler will fail to
* load if the sequence number does not match @scx_hotplug_seq on the
u64 hotplug_seq;
/**
- * name - BPF scheduler's name
+ * @name: BPF scheduler's name
*
* Must be a non-zero valid BPF object name including only isalnum(),
* '_' and '.' chars. Shows up in kernel.sched_ext_ops sysctl while the
/**
* scx_task_iter_next_locked - Next non-idle task with its rq locked
* @iter: iterator to walk
- * @include_dead: Whether we should include dead tasks in the iteration
*
* Visit the non-idle task with its rq lock held. Allows callers to specify
* whether they would like to filter out dead tasks. See scx_task_iter_start()
* scx_prio_less - Task ordering for core-sched
* @a: task A
* @b: task B
+ * @in_fi: in forced idle state
*
* Core-sched is implemented as an additional scheduling layer on top of the
* usual sched_class'es and needs to find out the expected task ordering. For
/**
* scx_softlockup - sched_ext softlockup handler
+ * @dur_s: number of seconds of CPU stuck due to soft lockup
*
* On some multi-socket setups (e.g. 2x Intel 8480c), the BPF scheduler can
* live-lock the system by making many CPUs target the same DSQ to the point
/**
* scx_ops_bypass - [Un]bypass scx_ops and guarantee forward progress
+ * @bypass: true for bypass, false for unbypass
*
* Bypassing guarantees that all runnable tasks make forward progress without
* trusting the BPF scheduler. We can't grab any mutexes or rwsems as they might
}
/**
- * scx_bpf_dump - Generate extra debug dump specific to the BPF scheduler
+ * scx_bpf_dump_bstr - Generate extra debug dump specific to the BPF scheduler
* @fmt: format string
* @data: format string parameters packaged using ___bpf_fill() macro
* @data__sz: @data len, must end in '__sz' for the verifier
* scx_bpf_cpuperf_set - Set the relative performance target of a CPU
* @cpu: CPU of interest
* @perf: target performance level [0, %SCX_CPUPERF_ONE]
- * @flags: %SCX_CPUPERF_* flags
*
* Set the target performance level of @cpu to @perf. @perf is in linear
* relative scale between 0 and %SCX_CPUPERF_ONE. This determines how the
/**
* scx_bpf_put_idle_cpumask - Release a previously acquired referenced kptr to
* either the percpu, or SMT idle-tracking cpumask.
+ * @idle_mask: &cpumask to use
*/
__bpf_kfunc void scx_bpf_put_idle_cpumask(const struct cpumask *idle_mask)
{
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