vdo_schedule_action(9)

💅 vdo_schedule_action(9) — the kernel API manual, but make it cute

okay so bestie, you found vdo_schedule_action and you're like "what does this even do" — don't worry, i got you. this is from the Kernel API Manual, and honestly? it's giving "queue up a little task for every zone" and i'm kinda obsessed. ✨

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🌸 NAME 🌸

vdo_schedule_action — schedule an action to be applied to all zones. literally what it says on the tin, no cap.

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🎀 SYNOPSIS 🎀

bool vdo_schedule_action (struct action_manager *manager ,
vdo_action_preamble_fn preamble , vdo_zone_action_fn action ,
vdo_action_conclusion_fn conclusion , struct vdo_completion *parent );

like, five whole arguments. slay. let's meet them 💅

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🦋 ARGUMENTS 🦋

• manager — the action manager you're scheduling the action on. this is the main character that runs the whole show 👑
• preamble — a method that gets invoked on the initiator thread once this action is started, but before it's applied to each zone; may be NULL. so it's the lil pre-game hype moment, and yes she can ghost you.
• action — the actual action to apply to each zone; may be NULL. the main event, but also optional, no pressure 🫶
• conclusion — a method invoked back on the initiator thread once the action has been applied to all zones; may be NULL. the cool-down, the afters, the "we did that."
• parent — the object to notify once the action is complete, or if the action can not be scheduled; may be NULL. your emotional support notification object 💖

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✨ DESCRIPTION ✨

so here's the tea 🍓: the action gets launched immediately if there's no current action, or as soon as the current action completes. like, she's ready when you're ready.

but — and this is the important bit — if there is already a pending action, this action will not be scheduled, and if it has a parent, that parent will be notified. so no cutting in line, bestie. 😭

also fr fr: at least one of the preamble, action, or conclusion must not be NULL. all three being NULL is a vibe check that does not pass. 💀

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⭐ RETURN ⭐

true if the action was scheduled. that's it. that's the whole mood. ✅

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/md/dm-vdo/action-manager.c
• struct action(9)
• struct action_manager(9)
• vdo_make_action_manager(9)
• vdo_schedule_default_action(9)
• vdo_schedule_operation(9)
• vdo_schedule_operation_with_context(9)

go read those too, iykyk 🧚

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and that's the page, bestie! 🎀 it lives over in ./drivers/md/dm-vdo, dated October 2026, and it's part of the Kernel API Manual. mwah, go schedule something iconic 💅🔥👑