vdo_drain_flusher(9)

🫶 vdo_drain_flusher(9) — Kernel API Manual 💅

okay bestie, this is the manual page for vdo_drain_flusher, and it is exactly what it sounds like: we're draining the flusher. No cap.

✨ NAME ✨

vdo_drain_flusher — Drain the flusher. That's the whole name, and honestly? Iconic.

🌸 SYNOPSIS 🌸

void vdo_drain_flusher (struct flusher *flusher , struct vdo_completion
       *completion );

🎀 ARGUMENTS 🎀

• flusher — the flusher to drain. Like, that's the whole assignment, bestie.
• completion — the completion to finish when the flusher has drained. It's giving "call me when you're done" energy.

🦋 DESCRIPTION 🦋

So here's the tea: vdo_drain_flusher drains the flusher by preventing any more VIOs from entering the flusher and then flushing. After all that, the flusher will be left in the suspended state — that's the ending, periodt.

👑 SEE ALSO 👑

Kernel file first, then the whole flusher friend group, fr fr:

• Kernel file: ./drivers/md/dm-vdo/flush.c
• assert_on_flusher_thread(9)
• as_flusher(9)
• completion_as_vdo_flush(9)
• vdo_waiter_as_flush(9)
• vdo_make_flusher(9)
• vdo_free_flusher(9)
• vdo_get_flusher_thread_id(9)
• finish_notification(9)
• flush_packer_callback(9)
• increment_generation(9)
• notify_flush(9)
• flush_vdo(9)
• check_for_drain_complete(9)
• vdo_complete_flushes(9)
• vdo_dump_flusher(9)
• initialize_flush(9)
• vdo_launch_flush(9)
• release_flush(9)
• vdo_complete_flush_callback(9)
• select_bio_queue(9)
• vdo_complete_flush(9)
• vdo_resume_flusher(9)

This cutie came from ./drivers/md/dm-vdo, dated October 2026 — vdo_drain_flusher(9) signing off, mwah 💖🎀